Hot-Water Generators - Water Circulation Rates

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The diagrams below indicates the water circulation rates through hot-water generators in imperial and SI-units.

Water Circulation - Boiler Capacity in BHP - Temperature drop in degrees Fahrenheit

• 1 gal (US)/min =6.30888x10^-5 m³/s = 0.0227 m³/h = 0.06309 dm³(liter)/s = 2.228x10^-3 ft³/s = 0.1337 ft³/min = 0.8327 Imperial gal (UK)/min
• 1 hp (English horse power) = 745.7 W = 0.746 kW = 550 ft lb/s = 2,545 Btu/h

Water Circulation - Boiler Capacity in MBtu/h - Temperature drop in degrees Fahrenheit

• 1 Btu/h = 0.293 W

Water Circulation - Boiler Capacity in kW - Temperature drop in degrees Celsius

• 1 kW = 3,412 Btu/h = 1.341 British hp

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