The outdoor unit extracts heat from the air and transfers it to the refrigerant, which becomes a high-pressure, high-temperature gas.The refrigerant is then pumped to the indoor unit, where it releases the heat indoors through a heat exchanger. This makes the indoor air warmer and more ...
it is usually in reference to its BTU rating. BTU stands for British thermal unit and represents the amount of heat needed to raise one pound of water 1⁰Fahrenheit. Furnace size or capacity is expressed in BTU/h, or the amount of British thermal units the furnace can generate per hour...
A variation to that is a vacuum retort furnace, that normally works at lower temperature and has heat exchanger and circulation motor placed outside of the furnace body. The vacuum in the furnace is maintained by vacuum pumps. Depending on the application, a single or combination of mechanical...
Split-system air conditioners are units with the condenser and compressor placed outdoors, and an indoor unit containing the evaporator, furnace, air handler, and filters. 3. Furnaces Furnacesare indoor units that burn fuel, like gas or propane, to heat up the air, then distribute it through ...
The furnace heats the heat exchanger. In most cases, the heat exchanger is a metal chamber around the furnace. Cold air from the house is drawn into the heat exchanger through a set of “cold-air return” ducts. The cold air gets warmed up as it moves through the heat exchanger. ...
Your HVAC system is responsible for heating and cooling your home. Learn more about this critical home system in the sections below.
Thermostat: The thermostat regulates the furnace’s operation, turning it on and off based on the desired temperature settings. In gas and oil furnaces, the combustion process generates heat, which is then transferred to the indoor air through the heat exchanger. Electric furnaces use electr...
Electric furnaces can heat the air by exposing heated elements, while other types of furnaces typically require a heat exchanger or chamber that warms the surrounding air. Finally, the thermostat signals the furnace to shut off when the set temperature is reached. Natural gas furnaces are highly...
awet patch, or a pool of water. It could be water thats under the furnace. Sometimes there’s a musty smell accompanying the leak. Because most of the problems we list below will happen when the furnace is in operation, you should expect water to leak or show up when the heat is on...
A downflow furnace is a type of furnace that allows cold air to enter the top of a furnace unit, where it is warmed, and exit the bottom of the furnace. Once warmed, the air then enters a home through air vents. Contrastingly, an upflow furnace includes a fan that blows cold air ...