Posts tagged ‘indoor air quality’

October 9, 2014, 3:52 pm

ASHRAE and IAQA Join Forces

ASHRAE-logoOctober 9_ASHRAE and IAQA merge_Image2

The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) and the Indoor Air Quality Association, Inc. (IAQA) announced on July 14 that they are combining forces. IAQA, the nation’s largest indoor air quality trade association, is now part of the prominent industry organization. The groups will work together to improve indoor air quality in the building environment.

The collaboration is expected to result in stronger programming and services. Indoor air quality technical guidance and educational programs for industry members should benefit, as well. The most significant result, as suggested by ASHRAE President Tom Phoenix, is “improved indoor air quality for the world around us.”

Click here to learn more about the merger.

Written by MitsubishiHVAC
February 18, 2014, 4:59 pm

Is Duct Leakage Testing Really Just Smoke & Mirrors?

February 18_Duct Leakage Testing ImageOf the more than a million miles of duct work in U.S. homes, industry experts estimate that more than two-thirds of them have leaks. This can account for as much as 25 percent of a home’s total energy loss. Duct leakage can dramatically reduce the HVAC equipment’s capacity and performance, causing hot and cold spots and humidity problems. Leaky ducts can also significantly increase homeowners’ utility bills and, worse yet, create air quality problems by pulling pollutants and other health hazards directly into the home. All of this creates an uncomfortable living environment for homeowners and their families.

Keeping in mind the number of issues that can arise from leaky ducts, ACH&R News writer David Richardson investigates the current metrics used for residential duct leakage testing, a verification process put in place by the International Energy Conservation Code (IECC) to ensure that healthy, clean air is provided to homeowners. In his article, “Using Duct Surface for Leakage Testing?” Richardson informs us of his findings:

Current duct leakage testing involves pressurizing the duct system to the standard 25 pascals using a calibrated fan and comparing the airflow against the conditioned floor area (CFA) of a home. Depending on local codes, the total leakage allowed is limited anywhere from 12 cubic feet per minute (cfm) per 100 square feet of CFA to 4 cfm, per the 2009 and 2012 IECC codes, respectively.

The problem with these measurements comes two fold. First, as Richardson explains, duct leakage occurs at the surface area of the duct, not the CFA. Therefore the current formula for testing duct leakage does not test the actual area of concern. Secondly, the 25 pascals value that the industry has deemed the standard operating pressure is simply outdated. Richardson writes that you rarely find duct systems running at that pressure in the field nowadays and in fact, pressures are usually elevated due to undersized duct systems.

No matter which way you cut it, Richardson’s examination shows that residential duct leakage testing can easily yield misleading or inaccurate results. So, as he asks, do we revise a formula that has been used for years or do we sacrifice some level of accuracy for convenience and simplicity?

What’s our answer? Go duct-free. Visit to learn more on how you can avoid the smoke and mirrors of duct leakage testing by choosing ductless technology as the HVAC solution.

November 12, 2013, 4:14 pm

Ductless on Every Job: Hot and Cold Spots

November 12_Ductless on Every Job - Hot and Cold Spots Image

Our Ductless on Every Job campaign is in full swing, so we’re back to educate contractors on yet another solution where they could consider ductless as an answer to a sales call’s need. This week, we’re focusing on how ductless can solve the hot and cold spots dilemma.

Even with the doors and windows closed, the homeowners still feel drafts inside. They’re comfortable in one room, too hot in another and cold everywhere else in the house. Sound familiar? If your customer is describing these common annoyances, rest assured that although the cause of hot and cold spots may be difficult to identify, there is one easy and effective solution – installing a ductless system.

Uneven temperatures in a house mean one thing: the home’s HVAC system is not working properly. If left unaddressed, energy will undoubtedly be wasted and homeowners will end up spending way more than they should on their utility bills. So, to help your customers win the battle for comfort, here are the common sources of hot and cold spots and how to explain to homeowners that ductless technology can rid the home of them:

  • The HVAC system isn’t properly sized. Systems that are too small cannot provide sufficient amount of air to heat and cool the entire home, and bigger is not always better when it comes to an HVAC system. Short-cycling, shortened lifespan and higher energy and operational costs are all results of inappropriately sized systems. With Mitsubishi Electric’s ductless systems, however, homeowners don’t have to worry about running into these issues. We offer a wide range of capacities to match the specific room size and requirements of the home. With our advanced zoning technology, multiple indoor units can be installed and individually controlled, allowing homeowners to condition only the occupied spaces and not waste energy conditioning the vacant areas. Whereas traditional HVAC systems only operate at either zero percent or 100 percent, our ductless systems use INVERTER-driven compressors that ramp up quickly to provide the energy necessary to achieve the heating or cooling demand then varies its speed to maintain the desired comfort level. The i-see™ Sensor found on some indoor units scans the room’s ambient temperature readings, detects any disparities and then adjusts the airflow to provide uniform comfort throughout the room. With these advanced technologies, the HVAC system performs only at the minimum energy levels necessary. Because of this, energy is not wasted when partial-load conditions are present, which is occurs about 97 percent of the time.
  • Leaking or poorly insulated ducts. Research from the U.S. Department of Energy discovered that about 30 to 40 percent of the air traveling through ducts leaks, which negatively impacts both the system’s efficiency and the air quality it provides. Not to mention, holes in the ducts introduce dust, bugs, allergens and other particles so what should be clean, filtered air ends up dirty and unhealthy.
  • Obstructed air vents. Floor or wall air vents blocked by decorations and furniture could also cause temperature swings in a home. Our expansive offering of indoor unit styles and combinations provide the ultimate design flexibility. The system’s components are compact, lightweight and can be installed in small areas, providing more space for interior design by minimizing the unit’s visual and auditory impact. Wall-mounted, ceiling-recessed, horizontal-ducted and floor-mounted indoor unit installation options allow the homeowner to design their space how they want to and not how they have to.

It is no doubt that hot and cold spots are uncomfortable to live with and that is the opposite of what homeowners should feel when they’re in their home. Our ductless system is the one-stop-shop solution to eliminate uneven temperatures and provide the utmost, constant comfort.

To learn more about the benefits of ductless systems, visit or go to

October 29, 2013, 12:55 pm

Project Profile: Green Acres Barn, Eden Prairie, Minn.

October 29_Green Acres Barn Image 1“If it was a 90 degree day, you just couldn’t be in there,” said Craig Schumacher, president of Countryside Heating & Cooling, about the Green Acres Barn in Eden Prairie, Minn. Schumacher was part of the team tasked with renovating the oldest-standing barn in the city, a project necessitated to avoid its demolition due the county’s plans to widen the Pioneer Trail and consequently replace Green Acres Barn with a drainage pond.

Schussler Creative and well-known as the creator of the Rainforest Café®, teamed up with Schumacher after he read about the fate of Green Acres Barn and purchased the structure from the county. Schussler decided to restore the 6,000-square-foot space into a place that could be used for a variety of events, from weddings and bar mitzvahs to community and charity events.

With that end goal in mind, Schussler, Schumacher and the crew were determined to find a way to maintain as much of the barn’s historic architecture and authenticity as possible while at the same time create a space where people would be comfortable inside. The existing traditional ducted HVAC system just didn’t cut it. The lack of sufficient air conditioning in the hot summer months forced people outside to fight the heat inside. So in order to transform the space into one that’s functional and pleasant to be in, Schumacher recommended our ductless system because “it simply was the right one.”

October 29_Green Acres Barn Image 2The historic elements and structural beauty of Green Acres Barn weren’t sacrificed by the new comfort system but preserved due to the minimal demolition required for ductless installations. Special brackets were made to mount the indoor units and protect the Gothic Arch-shaped roof made of ancient timbers and rare yellow glazed tile. The indoor units were painted to blend in with the wood interior and maintain the barn’s rich and enchanting ambiance.

Most importantly, thanks to the fresh and comfortable air supplied by our ductless system, party-goers can now enjoy the ambient lighting from the 35 crystal chandeliers, the old-fashioned player pianos and vintage jukeboxes, the coziness of the fireplace and wine cellar – all the things that has given Green Acres Barn that wow factor.

For more information on the Green Acres Barn restoration, click here.

October 18, 2013, 10:40 am

Ductless on Every Job: Allergies

We’re back again to educate contractors on another situation where they could consider ductless as an answer to a sales call’s need. As part of the Ductless on Every Job campaign we launched last month, we’re focusing on why ductless is the perfect HVAC solution for families with allergies and homes with poor air quality.

October 18_Ductless on Every Job - Allergies ImageDuring the fall, homeowners keep their windows open to continue enjoying the crisp, fresh air of the outdoors. But as the cold weather draws near, windows will close and heating units will turn on. This means that everything from showering and cooking dinner to pet dander and unavoidable dust mites will have an even bigger impact on the air quality inside a home. The Environmental Protection Agency lists poor indoor air quality in the top five environmental threats to public health, which doesn’t help the estimated 40 million individuals in the U.S. who are affected by allergies. Since homeowners and their families stay inside more when the temperatures start to drop, the impact of poor air quality on their health becomes more apparent. For these types of customers – those looking for an alternative to keeping the windows open for healthy and clean air – the search is over.

Ductless systems use a sophisticated multi-part filtration system to reduce airborne contaminants such as allergens, viruses and bacteria from the air. This combination of filters traps common indoor pollutants such as dust, pollen, mold and other particles that plague allergy sufferers, providing a healthier breathing environment for the homeowners and their families.

Our ductless technology even makes it easy for homeowners to clean and maintain their HVAC system. The indoor units have hybrid catechin pre-filters that are easily accessible in the unit, allowing the maintenance process to take only a matter of minutes. Each unit has its own filter that last up to 10 years to prevent cross contamination of air from room to room, which helps your customers save money and is beneficial for the environment as well.

According to the EPA, 87 percent of American homeowners are not aware that pollution may be worse inside their homes than outdoors so let’s educate them. It’s important for your customers to know how to maintain healthy air inside their homes in order to keep allergies and health issues at bay. And that’s ductless.

For more information on the Ductless on Every Job campaign, visit your local Mitsubishi Electric distributor.

August 21, 2013, 2:46 pm

The Not-So-Obvious Comfort Factor

The thermostat is set at 68 degrees Fahrenheit and it feels like 80, the outdoor unit is louder than ever, the utility bills continue to go up – these are the more obvious signs that an HVAC system should be replaced. Yet there’s another indicator just as important, but invisible to the naked eye: indoor air quality (IAQ). In a recent article from ACH&R News, “Making the Case for Healthier Homes,” contributing editor Kimberly Schwartz brings to light this sightless aspect of a cooling and heating system that is often overlooked by homeowners.

August 21_Making the Case for Healthier Homes ImageAccording to the Environmental Protection Agency, the air within our homes can be 100 times more polluted than outdoor pollutant levels. If not properly addressed, contaminated air can have profound effects on overall health and comfort. Eye, nose and throat irritation, headaches, dizziness and fatigue are some of the more obvious signs of poor IAQ. Over time, this exposure can lead to more serious health concerns such as asthma, respiratory and cardiovascular disease, and even cancer. So how can homeowners breathe the cleanest air possible? Here’s what you can tell them:

  • Get rid of the source: Look around the home for what may be causing the problem, and remove it. AirAdvice for Homes offers an IAQ home monitoring system to contractors that measures and transmits data for a week, focusing on six areas of air quality (temperature, humidity, carbon monoxide, carbon dioxide, particulates and volatile organic compounds). You can then generate comprehensive reports, diagnose the IAQ issues and provide solutions to the homeowner.
  • Air filtration: Cooling and heating systems with robust air filtration technologies are key in capturing the tiniest airborne particles that would otherwise end up in the lungs and cause health problems. For example, our systems feature multi-stage allergen filtration that removes allergens, viruses and bacteria from the air. Easily accessible filters absorb odors and trap dust, dander and other suspended particulates.
  • Ventilation: The growing trend of tighter building envelopes and more energy-efficient building codes makes ventilation more of a focus. Tighter homes don’t allow for enough outdoor air to be brought in to dilute contaminants or carry them out of the home. Ventilation systems are essential in exchanging stale indoor air for fresh outdoor air at the same air movement rates.

Once homeowners are aware of IAQ and its consequences to their health and comfort, they’ll be motivated to take action. And when they do, let’s be there to ensure that the air they’re breathing is the cleanest possible.

Written by MitsubishiHVAC
Comments Off
June 11, 2013, 2:13 pm

Four Tips to Convince Your Customers to Go Ductless This Summer

Selling Split Ductless

As temperatures rise, so do calls for HVAC repairs and replacements. Ductless systems are a great solution for the summer heat. They can be installed quickly, and they work well as a whole-home solution or as a supplement to an existing system. Although ductless systems are one of the fastest-growing segments in the U.S. HVAC industry, they’re still relatively new to the American market, and consumers may not know a lot about them.

Let’s educate them. Here are four benefits of the systems that will help you convince customers to go ductless this summer:

Energy Efficiency: Ductless systems are up to 40 percent more efficient than other types of HVAC systems. No ducts mean no duct loss and increased energy savings.

Allergies: The systems’ advanced allergen-filtration technology and washable filters eliminate contaminants from the air. Also, the potential for accumulation of mold spores and dust in ducts is decreased or eliminated, further improving air quality.

No More Hot and Cold Spots: The zoning capabilities of the ductless systems give homeowners complete and individual control over their comfort in each room.

Easy Installation: For both new construction and retrofits, these systems are easy to install. They require little to no ductwork, minimizing demolition in retrofits. And since the small footprint takes up less space in the home, homeowners have more usable space.

To learn more about how to sell ductless technology as the solution to the most common comfort complaints, visit We’re happy to help give you a leg up on the competition during your busiest time of year.

Written by MitsubishiHVAC
Comments Off
Free Viagra Samples