Should Your Home Have a HRV?

"A heat recovery unit includes two fans to transport fresh air into the building and stale air out of it," explains Stockhammer. "The integrated heat exchanger transfers waste heat from stale air to the fresh air being transported inside without any exchange of air flows. This process of mechanical ventilation results in lower energy loss and heating requirements, where up to 95% of heat energy can be recovered—using the additional heat that would be lost and transferring it back into your living space. It will also ensure airborne allergens, dust mites, mold, and other outdoor pollutants remain outside, enhancing the indoor air quality of your home."

She adds, "Your HRV will operate independently of your HVAC system, but there are units which can be included into the control system to make handling more pleasant. HRV will maximize the effectiveness of your building. Keep in mind, the HRV unit is not what generates heat, but rather what recovers waste heat to cut energy costs while ensuring good indoor air quality in your living space."

What types of homes have an HRV?

"HRVs are found in lots of different types of homes, as many ventilation systems work with heat recovery," noted Stockhammer. "They are more common in homes in a cold climate due to their energy efficiency, along with newer homes built to operate sustainably and multifamily homes to maximize air quality, to name a few."

While specific numbers for HRVs alone aren't widely reported, there are indications that they're gaining popularity. HRVs and Energy Recovery Ventilators (ERVs) together are increasingly being integrated into new construction as the quality of construction continues to prove homes are more weather-tight and in higher need of sustainable air circulation.

What can you do to prepare it for winter?

"Similarly to your standard HVAC unit, your HRV requires maintenance and upkeep," reminds Stockhammer. "The best way to ensure it’s in good shape is to bring in a technician for a service check on a regular basis every 1-2 years, but there are some things you can do on your own – including cleaning or replacing the filter to sustain clean airflow. It’s important that the appliance runs 24/7 to ensure economical and hygienic operation."