**Originally Posted By: afernbaugh**

**This post was automatically imported from our archived forum.**

If I understand the question you are asking you want to know about the relationship between kilowatt hours, BTU and square footage of heated and cooled area.

As Kevin and Blaine have both given you some good information I will try to lace it up in neat package for you. Down here, in the deep south,(this may vary with climate) a 2000 sq. ft. home would require 4 tons of air conditioning to keep the interior near 72 degrees F during cooling season and about double that BTU number for heating. The basis for this is that a “normal” cooling day at peak season is at 92 degrees F in my area. During heating season most HVAC contractors use 32 degrees F ambient temperature as their sizing assumption; heating to an interior temperature of 72 degrees F. The delta temperature for cooling is 20 degrees F and the delta temperature for heating is 40 degrees F; therefore the 2 to 1 ratio and a doubling of the btu rating for heaters vs. cooling.

As Blaine has said a 5 kw strip will produce about 17,000 btu. Accordingly, this 2000 sq. ft. home (above) would need about six (6) 5kw strips to produce 100,000 btu.

I hope this helps you.

Regards,

As Blaine explained you need to calculate the number of heating strip elements required

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Alan Fernbaugh

Five Star Inspection Services

Baton Rouge, La.