Aeroseal Frequently Asked Questions

aeroseal_logo_500

Aspen Air Duct Cleaning is an approved Aeroseal Dealer, licensed and ensured, and a member of the National Air Duct Cleaners Association (NADCA) and National Organization of Remediators and Mold Inspectors (NORMI). Following are some of our most frequently asked questions.

Aeroseal Frequently Asked Questions

Why should ducts in commercial buildings be sealed?  How much energy does the sealing process save?  How does Aeroseal work?  These are the questions we hear a lot and you’ll find the answers below.  If you have any other questions please do not hesitate to contact us – we’re here to help!

Why should ducts in commercial buildings be sealed?
Duct sealing in commercial buildings cost-effectively saves energy, improves air balance and thermal distribution (comfort and ventilation), and helps comply with building codes and specification for air distribution effectiveness.

How much energy does the sealing process save?
Energy savings are different for each building and HVAC system and obviously depend upon the initial air duct tightness. The Aeroseal Energy Savings Excel spreadsheet can be used to estimate the savings for most types of buildings.

In smaller commercial buildings with air ducts outside the insulation barrier of the building, energy savings can be as much as 30% of HVAC energy use. In large buildings Aeroseal duct sealing can reduce fan-system energy use by as much as 40% and reduce heating and cooling costs by as much as 10%.

As a rough estimate, simple paybacks typically range from 3 to 7 years. In some cases building owners have recovered the investment in Aeroseal duct sealing in less than 18 months.

Is the sealant used in Aeroseal safe?
The sealant material has been certified to UL1381, the industry standard for aerosol duct sealants. It is tested to rigorous requirements for flammability, smoke inhibition, mold growth and durability. The sealant has no OSHA Exposure Limit and no special precautions are required during application. It cures in less than two hours and meets LEED requirements for low VOC emissions.

The dried sealant material is primarily vinyl acetate polymer (VAP), which has been used in chewing gums, latex paints and hair sprays.

How long will the seals last?
The sealant has a life of over 30 years. Scientists at Lawrence Berkeley National Laboratory tested the performance of Aeroseal seals for 4 years under accelerated conditions, and were never able to observe a failure. This corresponds to 100,000 cycles under more severe temperatures and pressures than are found in duct systems.

How do I know if the ducts in my building need to be sealed?
The duct leaks can be uncovered several ways. Aeroseal has developed a simple survey (link) that can accurately predict if an air distribution system is leaking excessively. Another method is to review a Test and Balance Report and compare the flow at the HVAC system supply or return fans and sum of the flows measures at the supply diffusers or return grilles. Testing a sample of duct sections for leakage is an accurate way to identify if ducts are too leaky. Aeroseal technicians regularly perform this test.

How does the Aeroseal process work?
The Aeroseal process seals duct leaks from the inside, using small sealant particles that deposit at the leaks without coating the interior of the duct system.

This is accomplished by pressurizing the duct system with a fog of sealant particles sized to stay suspended in the air until they try to exit the duct system. By blocking all of the intentional openings in the duct system (i.e., diffusers or grilles), all of the sealant-laden air is forced out through to the leaks. As the duct pressure causes the particles to accelerate through the leaks, they stick to the edge and build upon each other until the leaks are sealed. By constantly monitoring the duct pressure and flow, the process-control computer calculates and the displays the remaining leakage in real time. When the sealing is finished, a complete minute-by-minute record of the process is printed, stored on the local computer, and then uploaded over the internet for archival on the Aeroseal server.

How large of a leak can be sealed?
Aeroseal recommends sealing the leaks up to 5/8 inches across. Leaks more than one inch across can be sealed, however the sealing rate varies with the size of the leak times itself. In other words, the sealing time for a 1″ leak is 64 times longer than that for a leak 1/8″ across.

Practically speaking, leaks larger than about 5/8″ across are better suited to be sealed manually if possible.

What types of ducts can be sealed?
Aeroseal is capable of sealing all types of ductwork. It has been successfully applied in rigid metal and flexible air ducts. It has been applied in duct with internal insulation. It has also been installed in duct systems fabricated of ductboard, drywall or masonry blocks.

Aeroseal avoids sealing through VAV boxes or fire/smoke dampers.

What about VAV boxes and fire/smoke dampers?
Aeroseal generally avoids blowing sealant materiel through VAV boxes or fire/smoke dampers, however laboratory and field testing have shown that under the right circumstances this can be done without adverse consequences.

Under no circumstances can sealant material be blown through VAV boxes with reheat coils. Should it be more practical to blow sealant through VAV boxes or fire/smoke dampers, it is recommended to consult with the engineers at Aeroseal LLC.

Do ducts need to be cleaned prior to sealing?
Extremely dirty ducts should be cleaned.  We recommend that the technician assess the condition of ducts prior to beginning to Aeroseal process.

Can I clean my ducts if they are sealed by Aeroseal?
Ducts of all material types can be successfully cleaned after they have been sealed with Aeroseal.

Can Aeroseal be used to seal air leaks in exhaust duct systems serving Type I (grease) commercial kitchen hoods?
We do not recommend Aeroseal to seal air leaks in exhaust ducts serving commercial kitchen grease & heat removal hoods (Type I hoods).  The sealant is not listed or rated for use as a duct sealant for these types of systems, and harsh cleaning chemicals used to clean the ducts could remove or degrade the performance of any seals.

Don’t see the answer to your question? Let’s talk!

Source: Aeroseal

Please contact Aspen Air Duct Cleaning at 1-800-931-6653 for an Air Duct System Inspection and to learn more about how sealing air duct leaks can improve indoor air quality and reduce energy costs. Or email info@aspenenvironmentalservices.com.

nadca-logo    normi-logo

Duct Leakage Testing is a Must

886 copy

A recent survey of the building construction industry by the Building Commissioning Association (BCA) on the issue of duct leakage resulted in some startling statistics. Seventy-five percent of the approximately 300 respondents felt that duct leakage contributes substantially to energy loss in commercial buildings. And, 74% of the respondents also believed most of the buildings in the U.S. have significant duct leakage (greater than 15%). Duct leakage can significantly increase the energy consumption of a building, leading to increased energy bills for the owner. It increases energy costs and can result in occupant discomfort and lower productivity. This combination can transform a building intended to be a high performing building into a building that is not. So, what can be done to combat duct leakage? Test early and test often.

As a commissioning provider for high performing buildings, we observe many instances of duct leakage in both new and existing buildings. The top factors for duct leakage issues are inadequate sealing of duct joints and access doors or panels, which are related to quality of duct installation workmanship, and over-pressurization of the air distribution system resulting in duct seam separation, which is related to HVAC system control. Many owners do not include commissioning, which can identify performance issues such as lack of testing requirements in the design specifications and building performance issues that occur during the design, construction, and operational phases of a project.

947 copy

Where new building codes (2010 and later) have been adopted, some duct leakage testing requirements exist. However, many states have yet to adopt the newer codes. While these new codes are beginning to require duct leakage testing, they only require 25% of the high- and medium-pressure duct be tested. As a result, duct leakage testing appears to be hit or miss when it comes to newly | Duct Leakage Testing is a Must http://www.hpbmagazine.org/Duct-Leakage-Testing-is-a-Must/index.ph… 1 of 2 12/6/2016 3:03 PM constructed buildings. Though a project designer can specify the required sealing level for each duct type, the only way to verify the effectiveness of the duct sealing is by duct leak testing.

It is important that design professionals specify duct leakage testing and have the commissioning provider observe duct leak testing of high- and medium-pressure ductwork in accordance with SMACNA’s HVAC Air Duct Leakage Test Manual. It is also important that the commissioning provider evaluate the building’s controls.

Allowable duct leakage rates specified are around 10%. However, for high performing buildings, designers may elect to reduce the allowable leakage amount in an effort to further reduce the energy consumption of the air moving systems. By specifying SMACNA duct leakage testing for medium- and high-pressure air duct systems integrated with commissioning in their projects, design professionals can be confident that their building will meet the high performing requirements of the owner.

The survey by the BCA also noted that a majority of respondents felt duct leakage is most prevalent in existing buildings. This should come as no surprise to individuals in the building industry. Many of the existing buildings that are prime candidates for services such as energy audits or retro-commissioning were built 15 or more years ago. Even if duct leakage testing was performed when the buildings were constructed, the sealant materials can be either near the end of their useful life or have begun to deteriorate, which leads to increased duct leakage.

843 copy

Typical building maintenance programs do not include observations and maintenance of the duct sealants, and even if they did it would be nearly impossible for all seams and joints to be evaluated, let alone resealed from the exterior. What is the answer? Very cost-effective products that can be applied to the interior of the air distribution system that can seal most air loss paths. Maintaining a sealed air distribution system should be included in a building’s operation and maintenance (O&M) budgets, similar to sealants for the building enclosure. This is a simple way for building owners to keep their buildings’ energy consumption low.

If owners elect to have energy audit or retro-commissioning services performed on their building, they should require that these professionals evaluate the leakage of the existing ductwork. This can provide the owner with a low-cost energy measure that can potentially have a very low payback period.

833 copy

It is clear to the building industry that duct leakage is an issue. For buildings looking to be labeled as high performing buildings, it can be a significant issue. Therefore, it is imperative that engineers require duct leak testing and that commissioning providers ensure duct leakage is minimized. The simplest way to stop or significantly reduce duct leakage is to require testing and verification of the air distribution and exhaust systems’ installation and HVAC control function through the design and commissioning process.

Source: Aeroseal; authors H. Jay Enck, Member ASHRAE, HBDP, BEAP, CPMP, CxAP, LEED Fellow, cofounder/chief technical officer and David Cantrill, P.E., Member ASHRAE, BEAP, CCP, branch manager/commissioning authority/project manager, both with Commissioning and Green Building Solutions, Inc.

Aspen Air Duct Cleaning is an approved Aeroseal Dealer, licensed and ensured, and a member of the National Air Duct Cleaners Association (NADCA) and National Organization of Remediators and Mold Inspectors (NORMI).

Please contact Aspen Air Duct Cleaning at 1-800-931-6653 for an Air Duct System Inspection and to learn more about how sealing air duct leaks can improve indoor air quality and reduce energy costs. Or email info@aspenenvironmentalservices.com.

nadca-logo    normi-logo

See how Aeroseal works:

https://www.youtube.com/watch?v=heLz6bR_uYw&feature=youtu.be

Game-Changing Study Finds Aeroseal a Cost-Effective Solution for Duct Leakage in Commercial Buildings

buildings

Historically, duct leakage has often been viewed as a performance issue rather than an energy efficiency issue. Not anymore! As noted in a recent Building Solutions blog post, duct leakage is actually the Number 1 culprit when it comes to energy waste in commercial buildings. The growing recognition of duct leakage as a major cause of HVAC energy waste provided the impetus for a study on retrofit duct sealing conducted by the Center for Energy Efficiency (CEE) in Minnesota.

CEE

This four-year study and pilot project had several phases, beginning with the characterization and measurement of duct leakage in several types of Minnesota commercial and institutional (C&I) buildings. In the next phase, a subset of the C&I duct systems were sealed using both conventional and aerosol sealing methods. Finally the estimated energy savings and cost effectiveness of retrofit sealing measures were analyzed in order to develop screening criteria to identify cost-effective duct sealing opportunities.

The recently released study findings confirm that duct leakage in existing buildings has emerged as a new energy savings opportunity.  In fact, about 10% to 15% of Minnesota C&I buildings were found to have appropriate operational characteristics and leakage rates that are high enough to justify retrofit duct sealing work with a moderate to good payback of less than 7 years. In addition, the study found that duct sealing from the inside using the aerosol sealing method was effective in a variety of scenarios, often reducing leakage effectively to zero including:

  • Initially tight and leaky ductwork
  • Supply and exhaust ductwork
  • Upstream and downstream ductwork

The Center for Energy and Environment conducts technology and market assessments to identify tomorrow’s best clean energy strategies. This retrofit duct leakage study was conducted for the benefit of Minnesota’s Conservation Improvement Program (CIP) with funding from the Department of Commerce, Division of Energy Resources.

Source: Aeroseal

Aspen Air Duct Cleaning is an approved Aeroseal Dealer, licensed and ensured, and a member of the National Air Duct Cleaners Association (NADCA) and National Organization of Remediators and Mold Inspectors (NORMI).

Please contact Aspen Air Duct Cleaning at 1-800-931-6653 for an Air Duct System Inspection and to learn more about how sealing air duct leaks can improve indoor air quality and reduce energy costs. Or email info@aspenenvironmentalservices.com.

nadca-logo   normi-logo

Medical Center Saves Significant “Green” by Addressing Top Commercial Building Fault

healthcare-image-600width

Mom always scolded us not to leave the refrigerator door open (or we’d let all the cold out AND raise our electric bill). And everyone knows you should turn off the lights before you leave a room to save energy. But let’s magnify little house-based issues to the larger scope of commercial buildings. What do you think the top commercial building fault when it comes to energy waste/loss?  The answer is clear: Duct Leakage.

Berkeley National Labs did a study of the Top Ten building faults by cost (Figure 1), and the faults you would expect are on the list – the lights and HVAC left on when the building is unoccupied, not balanced airflow, dampers not working, etc. However, duct leakage tops the list, with an estimated annual cost of over $2.9 billion per year (which is 53% more than the second most expensive fault).

Figure 1

Figure 1 – Source: Building Commissioning: A Golden Case for Reducing Energy Costs, E Mills, 7/09

Duct Leakage Low-hanging Fruit for ESCOs
A good Energy Services Company (ESCO) is always on the lookout for new ways to save clients’ money. They have lots of choices when it comes to sustainability and energy conservation measures (ECMs). Assessing operating budgets, reviewing overall building performance and evaluating energy usage are just a few. As seen in Figure 1, duct leakage is the “low-hanging fruit” with the biggest, and quickest opportunity for payback.
That’s what was discovered recently at New York State medical center. Aeroseal came to the center and conducted a preliminary analysis of the 100+ year-old facility. The facility manager was aware the hospital had air flow issues, and thus the potential for significant energy savings. The question was how much savings would Aerosealing provide, and how viable would it be to do the work in a 24/7 hospital environment?

Luckily both of these questions were answered affirmatively… and the results were nothing short of astonishing.

Armed with an Energy Model and a Plan
After a close and thorough inspection of the duct systems and sample static pressure testing, the Aeroseal team had the raw data it needed to make its savings calculations and return on investment estimations using a proprietary energy model. (Figure 2)

Figure 2
Figure 2 – Return on Investment graph

“The veracity of Aeroseal’s energy model and the leakage rates they were able to obtain through computerized testing gave us confidence that the estimated savings would be on target. Watching the process, we felt it was less about typical guesswork as it was about experienced testing and extrapolations – and it was backed up with a guarantee that we would get the level of ROI estimated by the final calculations” (ESCO/facility management).

But estimated energy savings was only half the battle. The duct sealing work also had to be performed safely with little to no disruption to the hospital’s day-to-day operations. After reviewing the patented Aeroseal process, including safety, longevity, results, and impact on their operations, hospital administrators gave the green light. The Aeroseal team constructed a plan of attack for the sealing five separate duct systems, and they consulted with hospital personnel every step along the way.

Staff from each unit involved knew when and where the work was taking place well in advance of any activity. They received continual updates throughout the project and were kept abreast of any new developments that might have arisen. Effective and ongoing communication with the administration and the facility managers as well as the staff was key to the project’s success.

Another big advantage to the Aeroseal approach is that it makes the entire duct system easy to access. Sealing from the inside-out eliminates the need to tear down walls, expose ceilings or tear off insulation in order to access the leaks. Not only does this account for the highly effective nature of Aerosealing when compared to tape or mastic, but it also eliminates the majority of disruptions associated with traditional duct sealing activity. In the hospital environment, minimizing the risks associated with such structural demolition was key.

The Results Are In!
When the project was complete, Aeroseal provided facility management with a detailed report of the results. Data taken before, during and after the sealing project showed an original leakage rate of 29,836 CFM (cubic feet per minute), which was reduced to a low 870 CFM. This represented a 97% reduction – 4% more than the originally modeled estimate. Based upon the report provided by Aeroseal, the facility manager was able to show his clients an annual cost savings of $22,694, based upon reduced air loss and lower fan speeds. Payback for the project would be well under seven years.

In addition, the sealing process provided immediate improvements to the comfort level within the hospital. Doctors and other staff members commented on the positive change that the Aerosealing had on ventilation and temperature control.

“There were two primary things that made this project such a success. First, flexibility. The Aeroseal team knew they couldn’t just come in and shut down equipment or section off the hospital to get their work done. Second, was planning. The preparation put into this project before the sealing even began was extraordinary and reflected the team’s understanding of the special requirements demanded by this unique environment. All of the advantages of the technology itself, implemented by a team that understood and met the unique requirements of a hospital environment made this a tremendous success.” – ESCO/Facility director

Source: Aeroseal

Aspen Air Duct Cleaning is an approved Aeroseal Dealer, licensed and ensured, and a member of the National Air Duct Cleaners Association (NADCA) and National Organization of Remediators and Mold Inspectors (NORMI).

Please contact Aspen Air Duct Cleaning at 1-800-931-6653 for an Air Duct System Inspection and to learn more about how sealing air duct leaks can improve indoor air quality and reduce energy costs. Or email info@aspenenvironmentalservices.com.

nadca-logo    normi-logo

Attention Commercial Building Owners and Facility Managers: About Ventilation for Commercial Buildings

aeroseal_logo_500
Chances are, your building’s ventilation system is broken.  According to the EPA and others, 80% of today’s buildings have ventilation shafts that leak an average of 15% or more. These leaks are the primary cause of ineffective building exhaust.

Like sucking air through a straw with holes in it, no matter how hard you try, getting the straw to work can be an impossible feat…until you seal those holes.

Symptoms of Poor Building Ventilation

Unfortunately, poor building ventilation can cost you plenty. Research has clearly linked faulty building ventilation to higher energy costs, added maintenance costs, chronic health issues, reduced worker productivity, increased absenteeism, lower student scores, and indoor comfort problems. Some common signs of poor ventilation include:

  • Persistent Mold & Mildew – Especially in Bathrooms
  • Chronic Odor Issues
  • Higher than Normal Energy Bills
  • High Rate of Worker Illness & Absenteeism
  • Noisy Exhaust Systems

An Easy Solution to Poor Building Ventilation

Most experts agree, the reason most U.S. buildings today are plagued with poor ventilation is because there simply wasn’t a practical solution. With most ventilation ductwork hidden behind walls or otherwise hard to access, finding and sealing the leaks responsible for the problem was just too expensive and too disruptive to even consider – so for decades, ventilation issues were simply ignored.

Aeroseal duct sealing technology changed that. Now, sealing the leaks that cause poor ventilation is a straightforward, cost-effective process. Since Aeroseal is applied from the inside of the ductwork, finding and sealing leaks is done with minimal if any disruption to existing structures. Projects can often be completed in as short as a single afternoon. A computerized report shows the actual before and after results.

capital-plaza-hotel
A Proven Strategy for Ventilation Issues

Aerosealing ventilation shafts solved chronic mold issues at the Capital Plaza Hotel in Frankfort, KY. It reduced energy costs for the Carlyle Towers High-Rise in Caldwell, NJ, and allowed Condell Hospital in Libertyville, IL to meet pharmacy exhaust regulations.

Source: Aeroseal

Aspen Air Duct Cleaning is an approved Aeroseal Dealer, licensed and ensured, and a member of the National Air Duct Cleaners Association (NADCA) and National Organization of Remediators and Mold Inspectors (NORMI).

Please contact Aspen Air Duct Cleaning at 1-800-931-6653 for an Air Duct System Inspection and to learn more about how sealing air duct leaks can improve indoor air quality and reduce energy costs. Or email info@aspenenvironmentalservices.com.

nadca-logonormi-logo

Duct Sealing a Logical Add-On to Duct Cleaning, Officials Say

aeroseal_logo_500

At Aeroseal, we pride ourselves on the “1-2 punch” that cleaning and sealing ductwork offers homeowners and business owners.

You probably already know the benefits of cleaning air duct systems in homes and buildings. Unfortunately, cleaning a duct system alone is only “fixing the symptom” (e.g. the ducts are dirty). It does not prevent the ducts from getting dirty AGAIN.

Good news! Aeroseal makes it extremely easy to effectively clean ducts AND prevent them from getting dirty again, leading to improved air quality (less dust and airborne allergens) in homes and buildings.

ductwork

Furthermore, SNIPS magazine recently published “Duct Sealing a Logical Add-On to Duct Cleaning, Officials Say,” by Michael McConnell.

In the article, McConnell writes, “For a growing number of duct cleaning companies, a project isn’t finished until that newly scrubbed ductwork and its HVAC system have been sealed. Sealing ductwork involves applying products such as tapes, coatings and sprays to the ductwork’s exterior or interior to ensure homeowners and building owners get all the HVAC performance they expect.”

NADCA Executive Director Kristy Cohen adds, “[Duct Sealing] is a service that’s growing in popularity.”

She points out, “We’re seeing an increase in the number of our NADCA members who are in that duct-sealing space. It’s something that they are looking at as a natural progression.”

Source: Jonathan Tharp, for Duct News and Aeroseal

Aspen Air Duct Cleaning is an approved Aeroseal Dealer, licensed and ensured, and a member of the National Air Duct Cleaners Association (NADCA) and National Organization of Remediators and Mold Inspectors (NORMI).

Please contact Aspen Air Duct Cleaning at 1-800-931-6653 for an Air Duct System Inspection and to learn more about how sealing air duct leaks can improve indoor air quality and reduce energy costs. Or email info@aspenenvironmentalservices.com.

normi-logonadca-logo

You can read the original full SNIPS magazine article at: http://www.snipsmag.com/articles/92554-duct-sealing-a-logical-add-on-service-to-cleaning-officials-say

The Importance of Spring Duct Cleaning

aeroseal_logo_500

If you’re like everyone else in New England, you can’t wait for spring to arrive. While we all look forward to the warm, sunny days, most of us dread time-consuming seasonal tasks like spring cleaning. At Aeroseal Solutions, we look forward to spring because it’s one of the best times to perform duct cleanings that help home and business owners enjoy the many benefits of enhanced indoor air quality. If you’re planning a thorough home or business cleaning, consider having your ducts cleaned as well.

Duct Cleaning Recommendations

Spring is the perfect season for duct cleaning because there’s a small window between the height of the heating season and the beginning of the cooling season.

dust

Industry associations and government agencies like the EPA recommend duct cleanings in specific circumstances. You don’t need to have a problem with mold, pests or construction debris to benefit. Cleanings are recommended if you can see dust coming from your vents. A thorough cleaning will also address stale or unpleasant odors that are noticeable when the system in running.

Benefits of Duct Cleaning and Sealing
If you or anyone in your family has experienced itchy, watery eyes, coughing, choking or respiratory discomfort this winter, dirty ducts could be the culprits. Families with asthma or allergy sufferers can benefit the most from a thorough duct cleaning. Pet owners will also notice a dramatic improvement in indoor air quality.

Aeroseal at work(1)

Before we begin the cleaning, our experts will assess your entire HVAC system. We pay extra attention to the supply and return ducts. The return is especially vulnerable because debris is pulled into the system where it coats fans and air handling components. On the other side, debris from the ducts is ejected into your living space, which can trigger allergy symptoms and fuel your discomfort.

before-after

Duct sealing is another thing to consider. This process can increase efficiency significantly while sealing cracks and gaps that allow pollutants to enter and contaminate your ductwork. Experts estimate that 20 percent of conditioned air escapes through cracks and loose fittings. If that much air can get out, you can imagine how much dirt and dust can enter.

Ways to Improve Indoor Air Quality
In addition to having your ducts cleaned and sealed, you can improve your air quality by adopting these smart habits.

  • Dust and vacuum regularly
  • Replace return filters monthly
  • Minimize the use of chemical cleansers
  • Have your HVAC system serviced annually
  • Hire a professional to inspect your ducts
  • Increase ventilation

Source: Aeroseal

Aspen Air Duct Cleaning is an approved Aeroseal Dealer, licensed and ensured, and a member of the National Air Duct Cleaners Association (NADCA) and National Organization of Remediators and Mold Inspectors (NORMI).

Please contact Aspen Air Duct Cleaning at 1-800-931-6653 for an Air Duct System Inspection and to learn more about how sealing air duct leaks can improve indoor air quality and reduce energy costs. Or email info@aspenenvironmentalservices.com.

normi-logonadca-logo

The Blizzard And Blocked Gas-Furnace Vents

aeroseal_logo_500

In light of the severe snowstorm recently experienced in the Northeast, Aspen Air Duct Cleaning Services would like to provide this helpful article from our fellow professionals in Connecticut as a service to our customers, colleagues, and the general public.

Gas furnaces, carbon monoxide and rotten eggs: Homes heated by natural gas vent a byproduct, carbon monoxide, to the outside of the house. A sidewall vent blocked by drifting snow, trapping carbon monoxide in the home, could be deadly.

Connecticut Natural Gas and Southern Connecticut Gas responded to about 250 reports of gas leaks caused by clogged sidewall vents or buried meter and regulator sets during a weekend blizzard, says spokesman Michael West.
Carbon monoxide, like natural gas, is odorless. Gas companies add mercaptan to their product, creating the signature rotten-egg smell. Carbon monoxide produced by burning that fuel will not smell like rotten eggs, but it’s not odorless, either.

“The clogged sidewall vents cause incomplete combustion,” says West, “and do create odors in the basement. Your equipment might start malfunctioning and people think they might smell something and that something’s odd. We get calls of concern and it’s really not a gas leak. It’s just your vents trying to vent. That backup will create a smell.”

Don’t let it get that far. Clear the vent and the meter area, says West, with something other than a shovel or snow blower, which can cause damage. Use a broom, he says. And don’t wait.
“Some people are still waiting for their street to be plowed,” he says. “What we’re saying is if you have gas heating in your home you just need to do this. There’s no need to wait. There’s no need to think about timing. There’s no need to try to figure that out. You just want to clear a path so you can vent properly.”

The weekend blizzard, and drifting, was fiercest at night. That’s when a working carbon monoxide detector, which every home heated by natural gas should have, becomes a potential lifesaving monitor.

If you smell an unusual odor, report it to your gas company.

Source: Kevin Hunt for the Hartford Courant

Aspen Air Duct Cleaning is an approved Aeroseal Dealer, licensed and ensured, and a member of the National Air Duct Cleaners Association (NADCA) and National Organization of Remediators and Mold Inspectors (NORMI).

Please contact Aspen Air Duct Cleaning at 1-800-931-6653 for an Air Duct System Inspection and to learn more about how sealing air duct leaks can improve indoor air quality and reduce energy costs. Or email info@aspenenvironmentalservices.com.

nadca-logo

Many Boston public schools are said to have bad air. Report calls poor ventilation, leaking roofs red flags.

According to The Boston Globe, a city report says that more than half of Boston’s schools are plagued by poor or deficient air quality, which studies have linked to low student achievement and high rates of asthma.

The findings, released Wednesday, are based on an examination of schools’ ventilation systems or the lack of them, and other factors that can affect air quality, including the inability to open windows.

Boston Mayor Martin Walsh is quoted as saying, “The city’s schools have a ‘history of neglect.’”

This is not an uncommon problem in city-owned buildings, which are often neglected due to lack of taxpayer funds. But this neglect could result in costs that are far more than just repair—like student/teacher illnesses and absenteeism.

Source: Jessica Rinaldi for The Boston Globe

aeroseal_logo_500

A new technology called Aeroseal can solve problems like this and save school districts both time and money. Aeroseal s a product that seals small leaks in the ductwork. No attic work is required by the crew to work the equipment. It is monitored by a computer program that tells when the pressure of the ductwork is low enough that most of the leakage has been sealed.

Read the case study below to see how Aeroseal rescued the renovation of a school in this one example of many Aeroseal success stories.

WHEN NEW DUCTWORK WASN’T IN THE BUDGET OR TIME SCHEDULE AEROSEAL RESCUES ARIZONA MIDDLE SCHOOL RENOVATION

gallego-middle-school

During the floor-to-ceiling renovation of the Gallego Intermediate School, contractors removed the existing ceiling tiles to find ductwork that was in such bad shape, replacing the entire duct system seemed to be the only option. The building’s HVAC included 34 individual units, each with its own supply and return ducts, all made of duct board that was literally falling apart at the seams. Some of the ducts were in such disrepair that they made leakage testing impossible.

Unfortunately, the Tucson, Arizona-area school district couldn’t afford either the additional expense or time necessary to replace the existing duct system. Beyond the estimated $200,000 dollars it would have cost for the work, the school was set to open in three months and replacing the ductwork would have taken twice that time.

Faced with this project-halting dilemma, a consulting engineer on the project suggested they look at Aeroseal, a new duct sealing technology he had seen demoed at a recent industry seminar. The Aeroseal experts at GreenSeal were called in to share information about the new technology and in just a matter of days, they began the work.

Given the poor condition of much of the existing ductwork, the GreenSeal crew began reconnecting and repairing the most dilapidated portions using tape and mastic. Even after this work, testing showed a total system leakage rate of about 49,000 CFM. Then the Aerosealing began.

Aeroseal at work

It took GreenSeal less than two weeks to Aeroseal all 34 duct systems – both supply and return. The final results showed total leakage down to 8,000 CFM – an 85% reduction and well below the 5% leakage rate they were targeting. The total cost for Aerosealing was a fraction of the estimate for duct replacement and best of all, the school opened on time.

I think a lot of schools in the district could benefit from this technology. The Aeroseal team was able to work in coordination with all the other contractors on the job, ensuring that we maintained our extremely tight schedule. They also assisted us in securing a rebate from the local utility company that helped us stay within budget. In the end, this was an ideal solution to a potentially derailing problem. I look forward to assessing energy savings over the next year or two. In the meantime, we have heard nothing but positive feedback regarding the comfort of those using the new school building.”

Tom Hubbard, Bond Project Manager, Sunnyside School District

When contractors removed the ceiling tiles, they saw that the existing ductwork was in really bad shape. They wanted to replace all of the ductwork but it was simply out of the budget – and that’s when one of our engineering consultants suggested we look into using Aeroseal as an alternative. It proved to be much less expensive than replacing the ductwork and it took only a matter of days to complete the job so the school was able to open as scheduled.”

Cindy Bova, Energy Project Manager, Sunnyside School District

Aeroseal—The Technology:

Developed at Lawrence Berkeley National Laboratory in 1994.

Research for Aeroseal technology was partially funded by the U.S. Department of Energy.

Aeroseal is the only duct sealant technology that is applied from the inside of the duct system. It is delivered as a non-toxic aerosol mist that seeks out and plugs leaks.

Aeroseal has proven to be 95% effective at sealing air duct leaks.

Source: Aeroseal

Aspen Air Duct Cleaning is an approved Aeroseal Dealer, licensed and ensured, and a member of the National Air Duct Cleaners Association (NADCA) and National Organization of Remediators and Mold Inspectors (NORMI).

Please contact Aspen Air Duct Cleaning at 1-800-931-6653 for an Air Duct System Inspection and to learn more about how sealing air duct leaks can improve indoor air quality and reduce energy costs. Or email info@aspenenvironmentalservices.com.

nadca-logo

 

The Importance of Duct Cleaning Before Spring (Finally) Arrives

aeroseal_logo_500
If you’re like everyone else, you can’t wait for spring to arrive. While we all look forward to the warm, sunny days, most of us dread time-consuming seasonal tasks like spring cleaning. At Aeroseal Solutions, we look forward to spring because it’s one of the best times to perform duct cleanings that help home and business owners enjoy the many benefits of enhanced indoor air quality. If you’re planning a thorough home cleaning, consider having your ducts cleaned as well.

Duct Cleaning Recommendations
Spring is the perfect season for duct cleaning because there’s a small window between the height of the heating season and the beginning of the cooling season.

Industry associations and government agencies like the EPA recommend duct cleanings in specific circumstances. You don’t need to have a problem with mold, pests or construction debris to benefit. Cleanings are recommended if you can see dust coming from your vents. A thorough cleaning will also address stale or unpleasant odors that are noticeable when the system in running.

Benefits of Duct Cleaning and Sealing
If you or anyone in your family has experienced itchy, watery eyes, coughing, choking or respiratory discomfort this winter, dirty ducts could be the culprits. Families with asthma or allergy sufferers can benefit the most from a thorough duct cleaning. Pet owners will also notice a dramatic improvement in indoor air quality.

Before we begin the cleaning, our experts will assess your entire HVAC system. We pay extra attention to the supply and return ducts. The return is especially vulnerable because debris is pulled into the system where it coats fans and air handling components. On the other side, debris from the ducts is ejected into your living space, which can trigger allergy symptoms and fuel your discomfort.

Duct sealing is another thing to consider. This process can increase efficiency significantly while sealing cracks and gaps that allow pollutants to enter and contaminate your ductwork. Experts estimate that 20 percent of conditioned air escapes through cracks and loose fittings. If that much air can get out, you can imagine how much dirt and dust can enter.

Ways to Improve Indoor Air Quality
In addition to having your ducts cleaned and sealed, you can improve your air quality by adopting these smart habits.

• Dust and vacuum regularly
• Replace return filters monthly
• Minimize the use of chemical cleansers
• Have your HVAC system serviced annually
• Hire a professional to inspect your ducts
• Increase ventilation

Source: Aeroseal

Please contact Aspen Air Duct Cleaning at 1-800-931-6653 for an Air Duct System Inspection and to learn more about how sealing air duct leaks can improve indoor air quality and reduce your energy bills. Or email info@aspenenvironmentalservices.com.

Aspen Air Duct Cleaning is an approved Aeroseal Dealer, licensed and ensured, and a member of the National Air Duct Cleaners Association (NADCA) and National Organization of Remediators and Mold Inspectors (NORMI).
nadca-logo
normi-logo