Ask Adam: What Is An Air Exchange?

An air exchange is actually and air exchanger. The air exchanger manages the ventilation for the whole house.

The installation of an air exchanger inside the house removes stale and polluted air from the house to the outside and replaces it with fresh air. Generally, an air exchanger system installed properly will renew the air of all the important parts of your home.

How Does It work?

A ventilation system is installed in the walls; those ducts ending with fresh air distribution grilles and stale air exhaust grilles. So you have fresh air and stale/used air separated into different ducts. The fresh air distribution grilles are located in each room of the house that needs fresh air. The stale air is generally located at the highest level of the house, where the excess humidity and pollutants build-up. That is what the air exchange comes in and takes the stale air out and fresh air in.

The fresh air distribution and stale air exhaust ducts connect o the air exchanger. And other ducts also connect to the unit: one for gathering fresh air from outside and the other one to exhaust the stale air to outside. The picture below illustrates how an air exchange works.

air exchange - furnace crystal lake il

If you want to install an air exchanger in your home, we have Honeywell air exchangers ready to purchase.

air exchanger - furnace crystal lake il

Wanting to know if running a furnace fan runs the same as an air exchanger? Come back for the next installment of Ask Adam! It will discuss if running a furnace fan is the same as an air exchanger.


Official HVAC performs air conditioning repairs in Crystal Lake, McHenry, Elgin, Gilberts, Woodstock.

Need more information or have questions about an air exchanger? Call 815-220-5125 or fill out our contact form today!

Looking for air cleaners? We provide various methods to reduce or eliminate allergies or airborne illnesses