Everybody knows that the return air filter is usually centrally located and easy to find. In a upper scale home I visited recently we discovered that there was what seemed like a air return in each room. After some searching the homeowner wanted to look under the house. After visually looking for the return air vent we discovered that we were looking in the wrong place. Upon looking a second time at the exterior air unit, we took the side cover off the unit and there it was.
A 20″ x 25″ x 4″ MERV 11 filter.
|9–12||1.0–3.0 μm||Legionella, Humidifier dust, Lead dust, Milled flour, Auto emission particulates, Nebulizer droplets||Superior residential, better commercial, hospital laboratories|
What better way to learn than hands on. The homeowner seemed surprised when he found out that he could get on-line @ amazon.com and buy the filters in a six pack with free shipping. This particular situation needed two different size filters. Both the MERV # 11 quality. So low and behold the Often Bought Together option @ amazon was exactly what he needed. So with this little info the homeowner stated that he would order the filters and if he needed any help installing them he would give me a call.
So many times in todays society the big companies come out and make something so simple and necessary seem so very big and impossible. Of course this means Dollars.
You too can do a lot to maintain your heat and air. But this one little thing is very important.
Change the filters regularly.
For more on MERV specs refer to: http://en.wikipedia.org/wiki/Minimum_efficiency_reporting_value