Heating and cooling 101

How the System Works

Heating and cooling are 2 of the most important concepts of home ownership. In fact, heating and cooling systems are major factors for those looking to purchase homes, and are a critical part of living comfortably in a home.You may frequently hear the term "HVAC", which is used to describe home heating and cooling systems. The acronym stands for Heating, Ventilation and Air Conditioning - which are the 3 primary functions of a home system. They control air temperature and humidity, and maintain the quality of the air in the home.

Central Systems

Heating and cooling systems may be classified as central or local. Central heating and cooling is the most standard method, and is defined by a system that produces warm or cool air in one central area and then distributes it throughout the home. There are many types of systems that work as central systems, from traditional split systems to packaged product systems.

Products typically used in central heating and cooling systems include:

• Heat Pumps
• Air Conditioners
• Gas and Oil Furnaces
• Fan Coils
• Evaporator Coils
• Single Packaged Products
• Controls and Thermostats

Local heating and cooling, on the other hand, produces warm or cool air at the location where it is needed and serves small spaces. Room Air Conditioners and Packaged Terminal Air Conditioners (PTAC) are examples of local heating and cooling.

Heating

Heating systems keep your home warm and comfortable. If you live in a particularly cold climate, the function of your heating system is a high priority.

Most central heating and cooling systems are classified as forced air systems, because they send air through ductwork for distribution. The ductwork can contain products that filter or clean the air.

Radiant systems create heat and deliver it using components such as radiators that distribute the heat into the home. Boilers are a traditional radiant heat source.

Typical heating products include:

• Heat Pumps
• Central Air Conditioners
• Evaporator Coils
• Room Air Conditioners

Split Systems

The term "thermostat" commonly refers to any unit that controls the operation of a heating and cooling system. Thermostats are used to turn on heating or cooling systems to bring the home to a set temperature. In addition to basic temperature control, programmable thermostats can be used to manage the timing of the system's functions, which can control overall energy use and costs.