Blaze King PEGASUS 9401 is a gas appliance that offers a high steady-state efficiency of 85.5% when used with LP gas. It has a maximum output of 32,500 BTU/hr with the fans on and a minimum output of 15,600 BTU/hr with the fans off. The appliance can be used at altitudes of up to 4,500 ft. and has a minimum inlet pressure of 10.5/2.61 in w.c./kPa. It is certified to the ANSI Z21.11.1-1991 "Gas-Fired Vented Room Heater" standard and the CAN/CGA-2.17-M91 "Gas-Fired appliance for use at High Altitudes" standard.