Heaters are available in a variety of styles, functions, and type of heat source.
The first step in choosing the right heater is to determine the area to be heated. Important questions to ask include “How is your building insulated?” and “What climate zone are you in?”. Using the FHA standard insulation and mid-North American zone average of 8.2 watts/ ft2 here are the basics to guide you. Remember that a poorly-insulated building will require more watts/BTU's.
Measure the size of the area to be heated and multiply length x width x 8.2. Find your total watts required for the room. Figures are based on standard 7' ceiling height, 15% total window and door openings on outside walls and 3/4 total air changes per house.
