"George E. Cawthon" wrote

Do the math, cheap filters go for about $3.50, $11 for standard filters
that you change every 2-3 months under very bad conditions, so $44-66 per
year. What is the capital cost and the annual replacement of the
Aprilaire type. If the Aprilaire type costs more for the first 8 years of
operations than the $11 filters, then go with the $11 filter types. Just
a thought!

We sell the replace filters (Spaceguard 2200?) for about $33. I have some
customers that have found them online for half that.