I have an HRV in my home and the air in my house is too dry. What's wrong?

You have your control set too low. Increase the desired level of humidity. Change ventilation mode from continuous to standby. Or, your fresh air appliance (HRV) is out of balance. In which case you need to have your appliance balanced.

I have an HRV in my home and the air in my house is too humid. What's wrong?

Check to make sure your humidistat control is not set too high. Has there been a sudden change in temperature? If so, wait until outside temperature stabilizes (winter). Heating will also improve the situation. Storing too much wood inside. Even dried, a cord of wood contains more than 20 gallons of water. Be sure the dryer is venting to the outside. Possibly there is poor air circulation near windows. Open curtains or blinds. Bay or bow windows may require mechanical method. The appliance may be out of balance. In which case balance the appliance. The basement door may be too well sealed. Open a door or install a grille on the door.

What is the difference between a Heat Recovery Ventilator (HRV) and an Energy Recovery Ventilator (ERV)?

An HRV transfers "sensible" energy (Heat/Cool) from the high (heat) to the low (cool), tempering the cool air in/out.

An ERV transfers the "sensible" energy the same as the HRV, it also transfers "Latent" energy (humidity) from the high (warm) to the low (cool) side. In southern areas of the country where the relative humidity is generally higher outside than inside and ERV transfers most of the high incoming relative humidity to the cool exhaust air stream.

Can an Energy Recovery Ventilator be used in Northern climates?

Yes, an ERV can be used in areas where the outdoor temperature is low. It is recommended that an ERV with Defrost capability be installed where the temperature drops below 23°F (-5°C) for more than 48 hours to stop icing of the core.

What maintenance does a fresh air appliance require? How often?

Depending on how urban the neighborhood is, you need to check the core and filters in your appliance every 3 to 6 months and clean once they are dirty. Check out this quick video on the maintenance procedure of your appliance.

What wall controller can be used with a fresh air appliance to supply air on demand?

Fantech has an extensive range of convenient wall controls that will help you efficiently operate your appliance (click). 

Where do I install a Fantech Whole House HEPA filtration unit?

DM3000P – Normally installed on the cold air return of your furnace or air handler. This model features an integrated pressure switch that energizes the HEPA unit any time furnace/ air handler operates.

CM3000 and CM3000i - Can be installed into the cold air return similar to the DM3000P or used as a stand alone unit. It can also be paired with a Fantech HRV/ERV.

Can the HEPA unit be installed in an unconditioned space like a garage?

The CM3000i has an insulated cover suitable for installations in unconditioned spaces.

How often do I need to change the filters on my ventilation system?

Depending on your neighbourhood and the filter class in your appliance, you may need to wash or replace your air filter every 2-3 to 6 months.

Where can I buy replacement filters for my fresh air appliance or whole house filtration unit?

If you are a homeowner, visit our online partner's website to find the right filter for your appliance. If you're a contractor, please visit Where to buy

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Fantech makes air quality control easy thanks to decades of research, development, and refinement that continue to push the industry forward. Learn which Fantech solution is the best fit in your next project today.