How do HRV’s work in HVAC system

How Does Heat Recovery Ventilation (HRV) Work In HVAC Systems

If you have been searching for a way to freshen the air in your home for the duration of the heating season, you should consider installing Heat Recovery Ventilation (HRV). An HRV is an appliance that allows for the easy removal of stuffy, stale indoor air and replacing it with fresh air from outside, without having to hike up your heating costs.

Proper ventilation of indoor environments helps prevent the buildup of irritating and even potentially toxic gases. If you have noticed in past winters that you and your family suffer from allergies and breathing problems, the stale air in your home could be responsible, and an HRV can help get rid of it.

How Does Heat Recovery Work?

A Heat recovery ventilator reclaims energy from the stale, exhausted indoor air to warm the incoming fresh air. HRV systems capture as much as 90 percent of energy already used for conditioning the incoming air. It is designed to be a ducted solution for the whole house.

How Does HRV Work: A Detailed Explanation of Processes

An HRV system has two fans: one for pushing the indoor exhaust air outside while the other pulls in fresh air from outside in equal measure. The HRV contains a core that absorbs heat from the exhaust air, and as fresh air from outside passes through the HRV system, it picks up the heat retained by the core.

Up to 90 percent of the thermal energy from the exhaust air is transferred into the incoming air, which makes it an energy efficient solution for fresh air ventilation. The freshly heated intake air is subsequently delivered to living areas and bedrooms.

The exhaust air is typically drawn from bathrooms and kitchens where pollutants and odors tend to collect. It then passes through the heat exchanger core where it transfers its thermal energy to the intake air before being finally exhausted to the outside.

The stale exhaust air stream and the fresh intake air stream never mix. In highly efficient units, the two streams of air pass through a honey-comb like structure comprising of thin-walled passages within the heat exchanger core that provides a large surface area for transferring energy between the air streams.

The HRV can be installed in the attic and subsequently ducted into the HVAC system or a different area in need of fresh air. HRVs typically have an air filter that prevents particles from getting into the fresh intake air. A variable speed HRV system lets you control the amount of fresh air that enters your home.

How Does a HRV Help?

Since the HRV system introduces fresh air into your home constantly without the need to pay to heat it, an HRV helps you save a lot of money and helps improve the quality of air within your home.

The fresh air intake dilutes the concentrations of harmful elements in the air that can have mild to serious health consequences. The harmful elements in the air come from new flooring, cleaning products, cosmetics, air fresheners, and even upholstery.

If you have a wood-burning fireplace in your home or use gas appliances, you may have gaseous byproducts from the combustion process. A garage attached to your home can also emit toxic fumes that also contain these harmful elements. A HRV system can help get rid of these pollutants.

The Bottom Line

A Heat Ventilation System (HRV) is very important when it comes to improving your indoor air quality without the need to spend too much money. If you would like to learn more about the HRV or get it installed in your home, you should get in touch with a professional heating and cooling service.

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