Browning BX31 Belt Els PW 29614 This OEM Lennox weather kit This OEM Lennox weather kit utilizes a precision engineered mild weather pressure switch that automatically cycles the outdoor fan motor to regulate high side pressure maintaining exact factory tolerances with a genuine HVAC motor mount is the difference between a quiet system and a costly call back the Browning BX31 shares the same 5 8 inch top width and length as a standard B31 but offers higher horsepower ratings and better flexibility due to its notched design High Temperature Resistance: EPDM material provides stable performance in extreme rooftop environments