How much does it cost to install an HRV or ERV ventilation system in a heated garage in Ottawa?

HRV and ERV installation in a heated garage is a specialized application that sits at the intersection of garage construction and residential mechanical systems — and it's worth understanding what you're actually getting before spending the money. For a typical heated Ottawa garage, expect to pay $2,500 to $5,500 installed for an HRV or ERV unit sized appropriately for a garage space, depending on unit capacity, ductwork complexity, and whether electrical work is needed.

That said, it's worth stepping back to clarify why ventilation matters so much in a heated Ottawa garage. When you properly insulate and air-seal a garage to survive -25°C winters — which you absolutely should — you create a tight envelope that traps moisture, carbon monoxide from vehicles, VOCs from paints and finishes, and combustion byproducts from gas heaters. Without mechanical ventilation, that air quality problem compounds over the winter months when the garage is sealed up tight. An HRV (Heat Recovery Ventilator) exchanges stale indoor air with fresh outdoor air while recovering roughly 70 to 80 percent of the heat from the outgoing air — meaning you're not just dumping expensive heated air outside every time the unit runs. An ERV (Energy Recovery Ventilator) does the same but also transfers some moisture, which can be useful in summer but is generally less desirable in a garage context where you want to expel humidity rather than retain it. For most Ottawa heated garages, an HRV is the more practical choice.

The cost breakdown typically looks like this: the HRV unit itself runs $800 to $2,000 depending on capacity and brand, installation labour adds $800 to $1,500, ductwork (if the garage doesn't already have it) adds $500 to $1,500, and electrical connection by an ESA-licensed electrician adds $300 to $600. A garage-specific HRV installation is simpler than a whole-house system because you're typically running just two duct runs — one supply, one exhaust — rather than a full distribution network. Simpler geometry means lower labour costs.

A few important considerations specific to Ottawa garages: first, if your garage has a natural gas unit heater, the HRV must be installed and configured so it doesn't create negative pressure that could backdraft combustion gases — this is a safety-critical detail that requires a licensed HVAC technician, not a DIY project. Second, HRV cores need to be rated for cold climates; Ottawa's winters will freeze a residential HRV core that isn't designed for sustained sub-20°C operation, so confirm the unit's defrost capabilities before purchasing. Third, the HRV exhaust termination on the exterior wall needs a proper exterior hood with a screen to prevent nesting and ice blockage — a small detail that causes disproportionate headaches when ignored.

This is genuinely professional territory — between the gas appliance interaction, the ESA electrical permit requirement, and the cold-climate engineering considerations, it's not a project to hand off to a general handyman. If you're planning a heated garage build or renovation and want to explore ventilation options alongside insulation and heating, you can browse contractors through the Ottawa Construction Network directory at justynrookcontracting.com/directory to find professionals familiar with this type of work in our climate.