E N R Heating & Air Conditioning

While you've probably heard of a thermostat and thermometer, have you heard of a thermistor? This is a resistor that's a key part of your thermostat. As the temperature changes, the resistance changes, which makes the thermostat turn on the heat.

The movement of air through spaces—specifically the rising of heat in buildings—is known as the so-called “Stack Effect.” Also, did you know that older radiators were constructed of cast iron, which weighs about 450 pounds per square foot.