Indoor Air Filtration the Saga
We have been rethinking our indoor air filtration for a month or more. The first thing that set us to thinking about it was the air filtration situation in our HVAC air handler. The situation was this: Jewel Plumbing & HVAC set up our HVAC and filter system, per our requirements. They built a 25"x 25" by 1" filter jig ahead of the squirrel cage fan compartment in the HVAC air handler. Our furnace is a LP gas fired forced air system with air conditioning. We had been sourcing our air filters for the first year from Jewel our installers, because it turns out that 25" x 25" air filters have not been all that common. For the first year we never saw any air filters of that size in the local box stores. Just recently we have seen a few start to appear. The filters we sourced from Jewel, were of the cardboard frame variety with very wispy synthetic fibers only 1" thick. They are the most rudimentary of HVAC air filters. ...