I chose 12“ because that’s how far my fan blades are from the ceiling and I didn’t want to lose headroom. I chose 12x20 because that seemed to be the cheapest size per area for 12” merv-14 filters.
I don’t have an HVAC system that uses a filter, so I don’t have something to match.
I chose 12“ because that’s how far my fan blades are from the ceiling and I didn’t want to lose headroom. I chose 12x20 because that seemed to be the cheapest size per area for 12” merv-14 filters.
I don’t have an HVAC system that uses a filter, so I don’t have something to match.