Capacity Min. 30ft³/hr Max. 75ft³/hr At 1" wc p.d.-- 150,000 BTUh: 20,000 BTUh minimum: 200,000 BTUh maximum Natural Gas 0.05 0.5 Gallons 0.74 Cv (0.64 kvs) 1/2 Gallon 1.2 GPM @ 0ft Head 1.6 GPM @ 0ft Head 1.6 GPM @ 0 Head 1.8 Cv 2.3 Cv 2.5 quarts 2.9-3.2 GPH @ 0ft Head 2.9 GPH @ 0ft Head 2.9-3.2 GPH @ 0" Head 3.2 Cv 3.9 Cv 4 Cv 5.0 Ah 8 GPH (500mL/16.91oz/min) @ 0 Head 11.7 Cv 13 Cv 15 Quarts 20 ga 25 oz hopper 40,000 BTU 50 Cv 65 (246.4) GPH (LPH) @ 1ft Head 70, 000 BTU 80 (303.2) GPH (LPH) @ 1ft Head 80 GPH 84 GPH 84 (318.4) GPH (LPH) @ 1ft Head 130,000 BTU/h Natural Gas at 1" WC p.d. 140 mL 140,000 BTU/h Standard Gas; 226,800 BTU/h LP Gas 150,000 BTU/h at 1" WC p.d. 150,000 BTU/h Natural Gas at 1" WC p.d. 150, 000 BTU 200 (758) GPH (LPH) @ 1ft Head 200,000 BTU/h Natural Gas at 1" WC p.d. 230,000 BTU/h Natural Gas; 372,600 BTU/h LP Gas 240, 000 BTU 260,000 BTU/h Natural Gas; 421,000 BTU/h LP Gas 270 (1023.3) GPH (LPH) @ 1ft Head 280,000 BTU/h Natural Gas; 453,600 BTU/h LP Gas 300,000 BTU/h Natural Gas; 486,000 BTU/h LP Gas 300,000 BTU/h Natural Gas at 1" WC p.d. 300, 000 BTU 350, 000 BTU