ABOUT HEAT AND HOT WATER
Most houses need equipment to stay warm
When the sun is shining, a passive solar house design can take advantage of available solar heat. But in many climates, winter days are short and winter weather is often cloudy, so passive solar gains are rarely adequate to keep a home warm all winter long.
A heating system strongly influences a home’s energy use. Only three things have a greater effect: air sealing, insulation, windows.