I am looking for the best place to buy a case of Furnace Filters on-line at the very best price that one can find. I use a 16" X 25" X 4" filter. What would be the best MARV to get? Since we do not smoke. Yes we do have a cat and dog. Would a Marv 13 be good or a MARV 11?
I also have a Filter that goes on a De humidifier that is a 151/2" X 191/2" X 13/4" and it has FME 40 Filter on it.
My house was built in 1973 and my ducts have never been clean, is it a good ideal to have them cleaned before the Heating Season begins? I have a Gas Forced Furnace.