back to Specs & Profiles Conversion Factors Multiply By To Obtain Boiler HP 33,475 Btu per hour Boiler HP 34.5 Pounds water evaporated Boiler HP 140 Square Feet (EDR) Btu .000293 Kilowatt-hours Btu .0010307 Pounds water evaporated from and at 212F. Btu .00416 Square Feet (EDR) Btu per hour .00002986 Boiler horsepower Btu per hour .000393 Horse power Calorie 3.968 Btu Cubic Feet 1,728 Cubic Inches Cubic Feet 7.48052 Gallons Cubic ft Water 62.37 Pounds (at 60F) Cubic ft/minute .1247 Gallons per second CFM 1.08 Btu per hour per degree T.D. Feet of water .4335 Pounds per square inch Feet per minute .01136 Miles per hour Feet per minute .01667 Feet per second Foot-Pounds .001286 Btus Gallons .1337 Cubic Feet Gallons 231 Cubic Inches Gallons 8.3453 Pounds of water at (60F) Horsepower 2.546 Btu per hour Kilowatts 56.92 Btu per minute Kilowatts-Hours 3415 Btu Pounds of Water .01602 Cubic Feet Pounds of Water 27.68 Cubic Inches Sq. Ft. (EDR) 240 Btu Sq. Ft. (EDR) .0071 Boiler Horespower Watt-hours 3.415 Btu