Heating & Cooling degree days are calculated using the weather data from WeatherUnderground.com. This is aimed at the energy-saving professionals that are already experienced in using degree days for energy-related calculations. If you use EnergyHead Energy Software you dont need to download this data as the EnergyHead automatically syncs with thease data..
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Enter a weather station ID if you have one, or search for any city, state, ZIP code, or airport code.