**Heating BTU Calculator: How Many BTUs Of Heat Per Sq Ft?**
https://learnmetrics.com/heating-btu-calculator/

In this climate zone, you will need about 40 BTU to heat 1 sq ft of space. Here’s how many square feet can a 40,000 BTU heat: Area = 40,000 BTU / 40 BTU per sq ft = 1,000 sq ft. In a standard climate, 40,000 BTU is enough to heat a 1,000 sq ft area. Obviously, if you live in colder climate, a 40,000 BTU heater will heat an area below 1,000 sq ft.

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