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Steam Carpet Cleaning or Hot Water Extraction, (HWE), use units of energy of both in-put and out-put power. There is a debate on how electric portable units compare to truckmounted machines. This chart should help answer some of those questions.

Conversion Tables

1 Airwatt

1 Cubic Foot of Air X 1 Inch of Hg X 0.616

1 Airwatt

1 Cubic Foot of Air X 1 Inch of H2O X 8.5

 

0.9992 Electric Watt

 

0.001340 Horsepower

 

3.409 British Thermo Units

 

0.8235 Fluid Pressure Units

1 Fluid Pressure Unit

1 Gallon H2O/Minute X 1 Pound/Square Inch

 

0.001647 Horsepower

 

0.4351 Electric Watts

 

4.19 British Thermo Units

 

1.229 Air Watts

1 Electric Watt

1 Volt X 1 Amp

 

3.412 British Thermo Units

 

0.8142 Fluid Pressure Unit

 

1.008 Air Watts

 

0.001341 Horsepower

1 Horsepower

550 Foot-Pounds/Second = 33,000 Foot-Lb/Minute

 

746.297 Air Watts

 

745.7 Electric Watts

 

2544.18 British Thermo Units

 

607.14 Fluid Pressure Units

1 British Thermal Unit

1 LB. H2O X 1F.

 

0.000393 Horsepower

 

0.2931 Electric Watts

 

0.2933 Air Watts

 

0.2386 Fluid Pressure Units

Air Watts

Inches of H2O1.5 X Orifice2 X 3.5

 

An electric heating element uses approximately 1500 watt of electricity and produces approximately 5000 BTUs, (5118 exactly). The electric heating element is almost 100 efficient. An 120,000 BTU propane heater produces approximately 70,000 of heat in the water, not as efficient. However, it would take 14 electrical cord of electricity to produce the same amount of hot water!

A #4 MV vacuum pump requiring 11.9 horsepower to run produces 2.49 horsepower in airwatts. The difference is power is heat.

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Revised: 05/14/06

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