What is The Purpose Of An Air Exchange System?
Last modified: 2019/01/03 | Approximate reading time 3 mins
In Canada, our winters are quite long and as a result, we spend a lot of time indoors with our doors and windows shut tightly. Our indoor air festers and waits for warmer days when we can let fresh air in finally. But what if there was a more efficient way to access the fresh air without ever opening a window? This is where the air exchanger comes into play!
Inherent to their name, air exchangers exchange the stale air from inside your home and swap it with fresh outdoor air. These devices, also known as mechanical ventilation systems, keep the home fresh as well as preventing allergens from collecting. We’ve got the down-low on everything you need to know about air exchangers, so read on to find out more!
Here is everything you need to know about air exchange systems!
How does an air exchanger work?
An air exchanger is installed to work with the existing HVAC system, pulling fresh air from outdoors into the home by way of the ductwork. Each unit consists of several separated channels that work to preheat incoming air with exhaust air. The duct system is outfitted with distribution grills, to pull in and distribute fresh air and stale air exhaust grills, that expel stale air.
These grills are connected to the air exchanger, and are located throughout the home; this could be anywhere from the kitchen to the bedroom or living room! Grills are generally placed where fresh air is most needed, so think about areas where ventilation or air flow aren’t as possible. While some grills are working to distribute fresh air into these spaces, others are pulling stale air from inside the home into the outdoors. These are placed in the highest level of the home as possible, as humidity and pollutants rise.
There are a few different air exchanger models on the market, but the main three style systems are a fully ducted system, an exhaust ducted system and a simplified system. The fully ducted system works with homes which have hot water or electric baseboard heating, and are most effective at capturing pollutants and distributing fresh air to living areas. Both the exhaust ducted system and the simplified system work with homes that have furnaces or forced air heating systems, and capture pollutants at their source.
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What does this mean for indoor air quality?
Air exchangers work in several ways to make sure the indoor air quality of your home is not only fresh but clean as well. Firstly, an air exchanger works to balance out the humidity levels of a home. All the indoor activities we participate in indoors, including cooking, washing dishes, showering and breathing, create moisture.
Thus, our indoor air inside has a collection of moisture and humidity buildup. When in excess, this moisture can condense on indoor surfaces, leading to deterioration and damage. Further, a buildup of moisture can lead to mould, mildew, dust and bacteria growing and accumulating. Since an air exchanger deals with the humidity levels of a home, homeowners can rest assured that it will work to balance out moisture levels.
In addition to an excess of moisture, the air inside of your home can become contaminated by appliances that utilize combustion, as these create carbon monoxide as well as other pollutants. Common sources of harmful gases include water heaters, space heaters, chimneys, as well as wood-burning appliances.
Not to mention, if you are living in a new home, the surfaces and products that it is made from can give off gasses that are not agreeable for living conditions. Air exchangers work to directly combat these harmful gasses and remove the stale buildup of air to the outdoors. Beyond the obvious health benefits, an air exchanger is working to create a more comfortable, fresher and better living environment for yourself and your loved ones.
Other things to consider
Something most homeowners likely do not consider is their indoor air pressure. An air exchange system can work to regulate the pressure inside of a home. It is vital when adopting an air exchange unit that it is correctly balanced so that neutral air is maintained in the home. Also, the outdoor climate plays a vital role when choosing an air exchanger for your home’s indoor air.
If you are living in an extremely humid climate, make sure to choose a model that directly deals with humidity levels. If you live in a province that is cold more often than not, make sure to look for a system that controls air flow. That way, you can leave your windows closed!
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