Sizing a BOILER

A boiler that’s too small won’t be able to produce sufficient heat to warm the house, and one that’s too large will waste energy. A boiler’s output is measured in BTUs (British Thermal Units). To calculate the correct size, use these guidelines: COLD CLIMATES: 50 BTUs per square foot MODERATE CLIMATES: 35 BTUs per square foot WARM OR HOT CLIMATES: 20 BTUs per square foot If choosing between boilers that are slightly larger or smaller than the suggested BTUs for the square footage of your house, always go with the larger option. Otherwise, you’ll be looking at supplementary heating methods.