Need help choosing furnace air filters - 4 or 5 inch?
I installed a new electric furnace last winter and in the process they installed a new HRV and high-efficiency filter housing.
The filter it came with was a 5-inch "merv 11" filter which lasted about 5 months. I replaced it with a 1-inch filter since I was in a pinch. I need to replace it now, and not sure what size I can use.
These are the 1 inch ones I got, but was told I should stick with a higher "merv" http://www.canadiantire.ca/en/pdp/filtr ... _Eq7xYgtPV
I got a coupon for one of these 4-inch filters: http://directairfilter.com/collections/ ... ir-filters
So do I just order those 4inch filter or pay double for their 5" filters to stick with what my system came with. Also, did I do any harm by using the 1-inch filters above for about 2.5 months?
Thanks in advance!
The filter it came with was a 5-inch "merv 11" filter which lasted about 5 months. I replaced it with a 1-inch filter since I was in a pinch. I need to replace it now, and not sure what size I can use.
These are the 1 inch ones I got, but was told I should stick with a higher "merv" http://www.canadiantire.ca/en/pdp/filtr ... _Eq7xYgtPV
I got a coupon for one of these 4-inch filters: http://directairfilter.com/collections/ ... ir-filters
So do I just order those 4inch filter or pay double for their 5" filters to stick with what my system came with. Also, did I do any harm by using the 1-inch filters above for about 2.5 months?
Thanks in advance!