24" x 36" Fire-Rated Insulated Access Door with Flange - Acudor 24" x 36" Fire Rated Insulated Recessed Door with Flange - Acudor The FW-5050 is an insulated, fire rated access door approved for use in walls and ceilings. For walls, this door has an Underwriters Laboratories (UL and ULC), 1-1/2 hour "B" label, with... Compare