Same as D4 except uses thermocouple pilot and pilot relay. HEATING RATINGS AND CAPACITIES Rating1 Input2 BTUH 80,000s Output BTUH 64,000 Ratings are for elevations up to 2000 ft.; for higher altitudes, reduce ratings 4 % for each 1000 ft. above sea level. 220% reduction in input allowed. 3For LP Gas, model designated 80-V-394, A.G.A. Input 75,000, Output 60,000. -minimum cooling -minimum cooling with L —Multi-speed direct drive heating-M—Multi-speed direct drive heating-evaporator blowe