## Industry Conversions

### Power & Heat

= 1

BHP
(boiler horsepower)
GPM
(US gallons ⁄ minute)
BTUh
(BTUs ⁄ hour) 1
lbs. ⁄ hour 2 ft² (square feet) EDR
1 BHP (boiler horsepower) 1 0.069 33,475 34.5 139.5
1 GPM (US gallon ⁄ minute) 14.5 1 485,387.5 500 2,000
1,000 ft² (square feet) EDR 7.2 0.5 240,000 250 1,000
###### Example 1

A 500 HP boiler requires what size receiver for 10 minutes storage? Toggle Answer

345 gallons
Steps
• 500 BHP × 0.069 gallons ⁄ min (GPM) = 34.5 gallons ⁄ min (GPM) condensing rate
• 34.5 gallons ⁄ min (GPM) × 10 minutes = 345 gallons
###### Example 2

A steam load of 6,695,000 BTUs ⁄ hour requires what size receiver for 15 minutes of storage? Toggle Answer

207 gallons
Steps
• 6,695,000 BTUs ⁄ hour ÷ 33,475 BTUs ⁄ hour = 200 BHP
• 200 BHP × 0.069 gallons ⁄ min (GPM) = 13.8 gallons ⁄ min (GPM) condensing rate
• 13.8 gallons ⁄ min (GPM) × 15 minutes = 207 gallons

### Liquid & Volume

= 1

US gallons ft³ (cubic feet) in³ (cubic inches) lbs. (water)
1 US gallon 1 0.1337 231 8.345
1 cubic foot 7.48 1 1,728 62.34
1 lb. (water) 0.12 0.01604 27.72 1

1 lb. of water assumes temperature of 60°F, specific gravity = 1.000, specific heat = 1.0.

### Pressure

= 1

feet of head (water) psi (lbf ⁄ in²) inHg (inches of mercury)
1 foot head (water) 1 0.433 0.883
1 psi (lbf ⁄ in²) 2.31 1 2.04
1 inHg (inch of mercury) 1.13 0.491 1

= 1 volts