Central Cooling

Are you curious about how a heating and cooling system works? Well, the most common central cooling system is a split system, which includes an outdoor cabinet containing a condenser coil and compressor, and an indoor evaporator coil, usually installed next to your furnace or air handler. The compressor pumps a chemical called refrigerant (a compound typically found in either a fluid or gaseous state) through the system.

How Central Cooling Works

Once warm air inside your home blows across the indoor evaporator coil, the heat transfers to the refrigerant inside the coil. That transfer, in turn, “cools” the air. The refrigerant is pumped back to the compressor where the cycle begins again. The heat absorbed by the refrigerant is moved outside your home while cooled air is blown inside. Moisture that contributes to humidity is also removed from the air, which is great for humid climates!

Your cooling system is usually combined with your central heating system because they share the same ductwork for distributing conditioned air throughout your home.

Central Heating

Central heating systems have a primary heating appliance, such as a furnace, typically located in your basement or garage. All furnaces consist of four main components:

1. Burners that deliver and burn fuel

2. Heat exchangers

3. A blower

4. A flue that acts as an exhaust for gaseous by-products

You can choose from heating systems running on either gas or oil, or a hybrid system that can use both fuel types. Each system has its own benefits, so depending on your heating needs, see what works for you!

How Central Heating Works

Combustion gases are generated by the burners in your furnace and passed through a heat exchanger. Air from your home blows across the heat exchanger to be warmed. It is then blown through a system of ducts to distribute around your home.

During warm seasons, your heating system works with your central air conditioning. Air is cooled as it’s blown over your air conditioning unit’s cooling coil, often attached to the air circulating fan of the furnace, and then sent through the same air ducts throughout your home.


One can say that it’s pretty neat how a heating system and cooling system work together! There are so many components that go into building and maintaining a HVAC system, all of which are taken care of by your local service technician. If you need a heating and cooling system, make sure to check out Don’s Heating and Cooling today!