was the last time you changed the air filter in your furnace or HVAC unit?
Depending upon the filter and type, if you can't remember, then it is
probably time to do something.
Here are a few facts about
- Spun glass filters only
stop about 10% of the dirt and need to be changed
every 30 days! What happens to the rest of the dirt? Check your
coils and ductwork! Can we say Yeech?
- Dirty air filters of any
type can greatly reduce the efficiency of your system. It has to work
harder to either heat or cool your home, wasting energy and also can
reduce the life of the unit. Dirty air filters can also lead to cracked
heat exchangers in gas-fired units.
- Washable type media is
OK if the media opening is sized appropriately. Some washable medias
such as the one in the background are too restrictive when clean much
less dirty. If you are using such a media, consider replacing.
- Paper medias which can
be purchased in most home improvement stores, in my opinion is the best.
Depending upon the type and manufacturer, these medias need to be
replaced every 30-90days.
- The BEST type of media
is the 4" thick media. The initial cost is higher, but these can last
about 9 months to a year depending upon size and application. Search for
Honeywell Return Air Media using your
search engine browser.
- MERV ratings are
important. The higher the MERV rating the better the filter is at
trapping dirt and and other air-borne contaminants. The minimum MERV
rating I suggest is 8.
If you find this
information helpful, feel free to pass it on to a friend or colleague.
This posting and the
continents written here are the intellectual property of
Complete Home Inspections, Inc.
providing Nashville home inspections for
and the Davidson and
Counties of Middle Tennessee. The views and opinions expressed are just that
- views and opinions of Michael Thornton and those who comment. This post
is part of the ActiveRain Real Estate Network, which is a social network
highlighting the best of Web 2.0. Information is provided with the
intent of educating and assisting home owners, home sellers, home buyers, real estate investors,
and real estate professionals with information the can be used to make better real
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