Indoor Air Quality

Pollution from power plants, cars, and other transportation is a well-known contributor to outdoor air pollution, but our indoor air quality is often worse; it can be up to 10 times worse for you than the air outside. Microbial pollutants like mold, pet dander and plant pollen can combine with chemicals like radon and volatile organic compounds (VOCs) to create a pretty toxic environment in your home; since we spend an average of 90% of our time indoors and 65% of our time inside our homes, according to theNational Safety Council, that can aggravate allergies, asthma and worse.

Everything that comes in to our homes has the potential to be harmful to our health; this includes things from the building materials and elements that hold our homes together to the furniture we sit on and the paint that goes on the walls. Indoor air pollution can be bad, but it doesn't have to be.

What causes poor indoor air quality?
Indoor air pollution can be easy to manage once you understand where it comes from. Looking at the image above gives you some idea of the more common sources for poor indoor air quality. In many cases, it comes from chemicals that are part of the things that you bring into your home; the polyurethane common in mattresses, formaldehyde and organic chemicals like dioxin, polychlorinated biphenyl (PCB) andpolybrominated biphenyl (PBB) used in lots of furniture and other interior elements are all harmful to us humans. Drapes, carpets and other absorbent fabrics can help trap these nasties, along with dust, mites and other allergens, and our modern, mostly airtight homes keep them inside. Remember this: if there are chemicals and VOCs in a product, there are chemicals and VOCs that could come out, and they won't be good for you if they do.

Poor indoor air can be improved through ventilation. Bringing in fresh outdoor air and/or exhausting stale air will improve your overall indoor air quality. Aprilaire offers systems that can do both.

As we move into the fall humidifier season, one question that gets asked a lot has to do with our advice on water temperature. When given the choice, why choose hot water over cold water to run to your Aprilaire humidifier
?

There are three main reasons. The first is performance. Our furnace-mounted humidifiers (except the drainless models) can get a performance boost by supplying hot water. We would recommend up to 140°F water to see up to 30% increased evaporation. For example, a model 600M humidifier on a furnace with 120°F air and 55°F water should evaporate 0.7 gal/hr for each hour it runs. By increasing the water temperature to 140°F, it boosts that 0.7 by 30% (.21 additional) for .91 gal/hr. Over the course of a heating season, estimating total usage at 600 hours, this translates to an additional 126 gallons of water put into the air.
 

The second reason is comfort. The more quickly the humidifier adds water to the air, the more quickly the air feels comfortable. This eliminates common complaints about too-dry air, itchy skin, dry, sore throats and static shocks.
 

The third is cost. This is often a sticking point. Does it cost more to heat the water with your water heater or to use the additional furnace and humidifier run time to increase humidity? Well, at 0.7 gal/hr, it takes the humidifier an additional 180 hours of furnace run time to create 126 gallons of evaporation. The water still needs to be heated so that it will evaporate. Is it more efficient to heat it with your HVAC system's hot air or with a water heater? Most likely it’s your water heater. Over the course of the humidifying season, the humidifier is evaporating the same amount of water, but by using hot water, it’s actually using less water to reach the same amount of soothing evaporative vapor.

Do electronic air cleaners have MERV ratings?

Electronic air cleaners cannot be given a MERV rating.

The reason is this. The MERV test standard (ASHRAE standard 52.2) requires the use of a specific “loading” dust to simulate the effect of time, where the filter gradually captures more dust. This “loading” dust contains a significant percentage of carbon. The carbon in the dust causes shorting in the electronic component of any electronic air cleaner, reducing the removal efficiency below the level it actually performs at (carbon dust is not normally present in homes).

Because of this, the only test that can be performed is the initial efficiency test, which is not enough to get a true MERV rating per the ASHRAE standard. If we tested the Aprilaire Model 5000 by replacing the carbon based dust with a non carbon dust that is the same particle size the Model 5000’s performance will be equal to a MERV 16, but this is the official test.

What is a MERV Rating?

MERV, which stands for Minimum Efficiency Reporting Value, is a rating that was developed by ASHRAE (the American Society of Heating, Refrigerating, and Air-Conditioning Engineers) used to assess the filtering power of a furnace filter/air cleaner.

The MERV scale consists of ratings from 1 to 16, with filter performance being greater as the number increases. On the MERV scale, dirt particles are graded from 0.3 microns to 10 microns. A micron is 1 millionth of a millimeter, and to give you an idea of just how small that is, you can look at the size of a single human hair. The average strand of human hair is about 100 microns thick, so imagine just how small 0.3 microns of dirt is!

Why is MERV Rating Important?

When you’re purchasing an air conditioner or furnace filter for your home, you want to be sure that you are buying a filter that will keep the air in your home clean. While all Aprilaire air cleaners will provide you with the filtering efficiency needed to improve the air quality of your home, depending on the particular needs of your family, you may require a filter that has a higher MERV rating, like the Aprilaire Model 5000 Electronic Air Cleaner.

Cases in which this is likely are those when you or someone in your home suffers from allergies, respiratory problems, or other similar incidences. Then again, you may just want to get the best filter for your family so that the indoor air quality around your home is the best it can be.

With Aprilaire AIr Cleaners, it's Garbage in, NO Garbage out!

Aprilaire Sponsors Terre Verde Green Renovation Project

Control of indoor air quality at the forefront of “Greenovation”

Madison, Wis. – Aprilaire, manufacturer of products that provide whole-house solutions to indoor air quality problems, is sponsoring a massive renovation project in Florida by providing the latest technology in air filtration, humidity control and zoned temperature control systems.

The project is Terre Verde, a 1970’s Florida-style ranch home adjacent to the Ocala national forest in central Florida. The home has been virtually untouched with any improvements in its entire 40 years.

Dr. Anna Marie, health specialist for The Weather Channel and host of the syndicated better living show YOUR LIFE WITH DR. ANNA MARIE, is leading this green renovation project to transform this home into an eco-friendly, energy efficient and ultimately healthy home.

Part of the renovation will employ new building technologies to make Terre Verde much tighter in order to save energy. While good for the pocket book and the environment, these kinds of advancements lead to the increase of indoor air pollutants – houses that don’t breathe like they use to. 

Working with local Aprilaire representatives and indoor air quality specialists, Aprilaire has installed the latest in air cleaning technology with One Touch active control, allowing the homeowner to control when and how much air cleaning takes place based on their lifestyle and need. Also provided is Aprilaire high-capacity Central Dehumidification and Zoned Comfort Control; a system which provides for focusing temperature control in specific areas of the home only where and when it is needed.

“These products help save energy by providing comfort while running air conditioning less often, but that’s just the beginning, noted Dr. Anna Marie, “They also provide for a much healthier, more sustainable environment by dramatically controlling the growth of mold and mildew, and trapping airborne allergens and other harmful particles from the entire home. Aprilaire products work together to protect the home’s furnishings, materials and of course it’s inhabitants. And that’ll be me, eventually!”

“Aprilaire is committed to the project and to help promote sustainable living, said Tom Ruse, Marketing Communications Manager. “We’re excited to help showcase the latest technologies available to make homes healthier, more comfortable and energy efficient”.

Terre Verde will be showcased at the Lake County Florida Builder Association’s Parade of Homes in March 2010.  

Aprilaire (www.aprilaire.com)

Aprilaire has been a brand leader in the indoor air quality industry for over 60 years. The company designs, develops, manufactures and distributes whole-home indoor air quality products that provide comfort, health, energy efficiency, and the protection and preservation of the home. For more information on central air cleaners, visit www.aprilaire.com.

The other day I was doing laundry and happened to notice the Aprilaire humidifier control installed on my HVAC system was indicating the relative humidity was 60%. This seemed odd to me since I have never noticed the humidifier operating during the summer. Then I talked to my HAVC installer and found my humidifier control is wired to only operate the humidifier during a heat call. Even though the humidifier control will only control humidity up to 45% relative humidity, it will measure relative and display humidity up 99%. Since my heat is never on during the summer, the reading on the control is the relative humidity the last time the heat ran.