Next, you’ll need to find out where you live according to a climate map. These are available online. If you can’t find one, contact your local HVAC representative and ask them if they can help you out. They will probably have the figures handy without even consulting the map. What you’re looking for is your climate factor number. It is one of the essential numbers you’ll need when calculating what size of heat pumps you’ll need to look at. The factor numbers will be in a range. Choose a lower number if you have good insulation and a higher number if you don’t. Next comes the fun part. You’ll take the square footage number you derived from your measurements and multiply it by the climate factor number you obtained from the map. This will give you a number known as the BTU requirement. This is how heat pumps are rated and sold, by BTUs. Divide this number by 12,000 and you’ll have an approximate size (in tonnage) of the heat pumps you should be looking at. This figure is no substitute for having a licensed HVAC contractor do his own calculations, but it is a good way to start estimating your costs.
Company Resource: Ground Source Heat Pump, Industrial Air Conditioner, Air Source Heat Pump
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