Superior & Lennox 36" & 42"Models: B36, BR36, HC36, RD36, BBV36, B40,BC42, BR42, HC42, RD42, BBV42
Majestic 36" & 42" Models: BR36, BC36, SR36, SC36, GBR36 , NVBR36, NVBC36, BR42, BC42 , SR42, SC42, NVBC42, NVBR42, NVSC42, NVSR42
Heatilator 36" & 42" Models: E36, EC36, BC36R, BC36C, E42, EC42
Measure the width and height of the steel opening where the enclosure will fit. This will be the same position that the fireplace manufacturer’s enclosure would be installed. Do not measure the finish material in front of the fireplace; brick, stone, marble, slate, tile, etc.