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.
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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