Kitchener-Waterloo Ventilation & Air Quality

An HRV (Heat Recovery Ventilator) brings fresh outdoor air into your home while recovering 70 to 80% of the heat from the stale air being exhausted. In Ontario's tightly sealed newer homes, an HRV is essential because there is not enough natural air exchange to remove moisture, CO2, and pollutants. Signs you need an HRV include persistent condensation on windows in winter, musty smells, stuffy air, and mould growth in bathrooms or basements. Ontario Building Code requires mechanical ventilation in all new homes, and an HRV is the most efficient way to meet this requirement while keeping heating costs down.

HRV installation typically costs $2,500 to $5,000 including the unit and ductwork connections. The price depends on the unit's capacity (measured in CFM, or cubic feet per minute), whether existing ductwork can be used, and the complexity of the installation. In homes with existing forced-air ductwork, the HRV connects directly to the existing ducts, reducing installation cost. In homes without ductwork, such as those with radiant heat, dedicated ventilation ducts must be installed, increasing the cost to $4,000 to $7,000. We size the HRV based on your home's square footage, number of bedrooms, and air tightness level.

Both HRVs and ERVs exchange stale indoor air for fresh outdoor air while recovering energy. The key difference is that an HRV transfers only heat, while an ERV transfers both heat and moisture. In Kitchener-Waterloo's dry winters, an ERV can help retain indoor humidity, which is beneficial if your home already struggles with dry air. An HRV is better for homes with excess moisture problems like condensation or mould. Our technicians assess your home's specific conditions and recommend the right unit based on your humidity levels, home size, and heating system type.

HRV filters should be cleaned or replaced every 2 to 3 months, and the system should receive a full professional service annually. Homeowner tasks include washing the filters, checking the condensate drain for blockages, and cleaning the exterior intake and exhaust hoods to remove debris or ice buildup. Annual professional maintenance includes cleaning the heat exchanger core, inspecting the motors and fan bearings, balancing airflow between supply and exhaust, and testing system efficiency. A well-maintained HRV lasts 15 to 20 years, while neglected units lose efficiency and can circulate contaminated air.

Yes. For older homes without existing ductwork, we can install a standalone HRV with dedicated ventilation ducts, add portable or duct-mounted HEPA filtration, install bathroom and kitchen exhaust fans to code, and add a whole-home humidifier if you have forced air. For homes with existing ductwork, adding a UV-C germicidal light inside the air handler and upgrading to a high-efficiency MERV 13 or higher filter are cost-effective improvements that significantly reduce airborne allergens, mould, and bacteria without any renovations to your home's structure.