This is a replacement for Honeywell 182002A and 27273, which fits Honeywell Energy Recovery Fresh Air Ventilation System model ER200.
Honeywell no longer makes this filter.
Approximately 11-1/2 x 20-3/4 x 1
Honeywell ER200
Other Stock Numbers: FX11-1/2x20-3/4x1, CP8.11-1/2x20-3/4x1
Filter Life: Replace every 12 months
(Or more often if the filter appears dirty to the point of blocking air flow through the heating/cooling equipment.)