United Filter
16x25x3 MERV 11 Furnace Filter Compatible with GeneralAire #4521 ReservePro (15-3/4 x 24-1/4 x 3) Clean, Healthy Air - Efficient, Home Climate Control HVAC Filters - Made in Canada - 3 Pack
Canadian Company: United Filter is a Canadian company. This does not by itself mean the product is manufactured in Canada.
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Canadian company — manufactured abroad
Verification Pending · last checked 2026-11-10
The 16x25x3 MERV 11 Furnace Filter Compatible with GeneralAire #4521 ReservePro (15-3/4 x 24-1/4 x 3) Clean, Healthy Air - Efficient, Home Climate Control HVAC Filters - Made in Canada - 3 Pack by United Filter is listed on Mapleo, available from Amazon.ca.
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