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BTUs required to heat a volume of fluid in an hour.

Using the equation:
BTU = 8.345404 (lbs per gallon of water) * Specific Heat * Specific Gravity * Delta T (°F) * Gallons

For example:

Assuming you have 300 gallons in a tank and wish to know the BTU requirement to raise it from 40°F to 120°F in an hour.

You would use 80°F for your Delta T
and 300 for your gallons.
Specific Heat
Specific Gravity
Delta T (°F)
Gallons
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