NEW! Faster Search Option
Nope, not a misprint. I am converting an air handler to be used as an air cleaner in the shop and am concerned as to what to use for filters. As I understand it, they use two filters, one like a house furnace would use and another probably finer filter between the first filter and the fan. Am I correct? This is the one I am concerned with. A furnace man showed me a five inch one that cost over $30.00. Sounds a little steep and some thinner, cheaper ones in the neighborhood of $3.00 to $4.00. Am I on the right track?