HRV & ERV Ventilation Systems

Installation, Repair and Replacement for Ottawa Homes

Balanced fresh air for every season

HRV and ERV systems in Ottawa give a home controlled fresh-air exchange without throwing away all the energy used to heat or cool the outgoing air. Both systems exhaust stale indoor air and bring in outdoor air through a heat-exchange core.

The important difference is moisture transfer. A heat recovery ventilator transfers heat but not humidity. An energy recovery ventilator transfers both heat and a portion of the moisture between the two air streams.

AirZone HVAC Services helps homeowners compare the home, occupancy, humidity pattern, ductwork and year-round ventilation goals before recommending either system. Our HRV and ERV Ottawa services include installation, replacement, airflow balancing, maintenance and repair across the city and nearby communities.

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HRV and ERV ventilation system for an Ottawa home

A balanced ventilation system brings outdoor air in while exhausting stale air at a controlled rate.

Serving Ottawa homeowners since 2005

Directly employed installation and service team

HRAI-trained ventilation and air-system design

Airflow balancing and complete system setup

What whole-home ventilation changes

Why Indoor Air Quality Matters in Modern Ottawa Homes

Modern homes hold conditioned air more effectively, but that also means moisture, odours and indoor contaminants can remain trapped without planned ventilation.

Controlled Fresh-Air Exchange

Replace stale indoor air with filtered outdoor air without relying on open windows, random leakage or exhaust-only ventilation.

Better Moisture Management

Ventilation can help remove moisture produced by occupants, showers and everyday living. ERVs also moderate moisture transfer between air streams.

Energy Recovery

The core transfers energy between outgoing and incoming air, reducing the heating or cooling penalty of mechanical ventilation.

Fewer Lingering Odours

Continuous low-speed ventilation can help remove stale air and everyday odours from bathrooms, pets, basements and household activities.

The decision most homeowners face

HRV vs. ERV: Which Is Better for an Ottawa Home?

Neither system is automatically better. The right choice depends on indoor humidity, occupancy, construction, how often the system will operate and whether the home tends to feel too damp or too dry.

Heat recovery ventilator

Choose an HRV When Removing Moisture Is the Priority

An HRV transfers heat between the outgoing and incoming air streams while allowing indoor moisture to leave with the exhaust air.

Often practical for homes with winter window condensation
Useful when indoor moisture loads are consistently high
Well established for cold-climate ventilation
May contribute to a drier home if ventilation is excessive

Energy recovery ventilator

Choose an ERV When Moisture Transfer Adds Comfort

An ERV transfers heat and a portion of the moisture between air streams. It can retain some indoor moisture during winter and reduce the amount entering with humid summer air.

Useful for homes that become uncomfortably dry in winter
Helpful for year-round ventilation during humid weather
Can reduce part of the latent load placed on the air conditioner
Does not replace a dedicated dehumidifier when moisture is severe

Comparison factor	HRV	ERV	What matters in Ottawa
Energy recovery	Transfers heat between the outgoing and incoming air	Transfers heat between the outgoing and incoming air	Both reduce the energy penalty of bringing in very cold winter air or warm summer air.
Moisture transfer	Does not transfer moisture through the core	Transfers a portion of the moisture between air streams	The home’s actual winter humidity and summer ventilation goals should drive the choice.
Winter humidity	Removes indoor moisture more directly with the exhaust air	Retains a portion of indoor moisture that would otherwise leave	HRVs can suit condensation-prone homes; ERVs can help homes that become uncomfortably dry.
Summer AC use	Outdoor moisture enters with the incoming ventilation air	Limits part of the moisture entering with humid outdoor air	An ERV can reduce part of the ventilation load but does not replace air conditioning or dehumidification.
Typical application	Excess indoor moisture, higher occupancy or winter condensation	Dry winter conditions, tighter homes or year-round ventilation	Home construction, occupants, controls and measured airflow matter more than a universal rule.

AirZone’s practical recommendation Start with the home’s actual humidity pattern—not a rule that every Ottawa property needs the same equipment. A high-occupancy home with winter condensation may benefit from an HRV, while a well-sealed home that becomes very dry may be better served by an ERV.

Review the moisture patternCondensation, dry air, basement dampness and seasonal humidity all point toward different solutions.

Confirm the ventilation demandHome size, bedrooms, occupancy and use help determine the required airflow—not the old unit’s label alone.

Inspect the existing ductworkA dedicated layout, partially dedicated system and furnace-connected installation each require different planning.

Plan the controlsLow-speed operation, timed boost, bathroom controls and humidity settings should match how the household lives.

See Available HRV and ERV Products Ask AirZone Which System Fits

HRV installation completed by AirZone HVAC Services in Ottawa

Installation quality changes performance

Professional HRV and ERV Installation in Ottawa

Seamless Integration With Your Furnace and Ductwork

A high-quality ventilation unit can still perform poorly when it is oversized, connected to restrictive ductwork or left unbalanced. Proper design and commissioning determine how much air actually enters and leaves the home.

Correct airflow selectionAirflow should be based on the home and ventilation requirements, then verified at the grilles.

Balanced supply and exhaustCommissioning helps prevent unwanted pressure differences and confirms that both air streams are operating as planned.

Cold-weather planningDefrost strategy, drainage, duct insulation and exterior hood locations matter during Ottawa winters.

Accessible maintenanceThe core, filters, drain and fans should remain reachable for cleaning and future service.

Controls homeowners understandWe explain normal operation, boost controls, seasonal settings and what should be checked between service visits.

Keep the air moving

HRV Maintenance, Filter Replacement and Repair

Ventilation equipment is designed to operate regularly, often continuously at a low speed. Dirty filters, blocked exterior hoods, a plugged drain, a loaded core, a failed fan or a control problem can reduce airflow and energy recovery.

If the unit is noisy, leaking, frosting excessively, failing to start or no longer moving air properly, book diagnostic service rather than treating the visit as routine cleaning. Our HRV repair Ottawa support begins with the equipment condition, model information and a practical repair-or-replace assessment.

Inspect the filters regularly

Many reusable filters should be vacuumed or washed every one to three months. Always follow the unit’s manual.

Keep the outdoor hoods clear

Leaves, lint, snow and frost can block the intake or exhaust and reduce performance.

Clean the core as directed

Cleaning requirements differ between HRV and ERV cores. Use only the method approved by the manufacturer.

Arrange periodic professional service

A service visit can review fans, drains, controls, duct connections and whether airflow remains properly balanced.

Local design and support

Why Ottawa Homeowners Choose AirZone

AirZone HVAC Services has helped local homeowners improve ventilation, humidity control and whole-home comfort since 2005. Our directly employed team can handle the complete process, including equipment selection, ductwork planning, installation, balancing, controls and future service.

We do not choose an HRV or ERV from climate alone. We look at how the home is built, how many people live there, where moisture is created, whether the furnace ductwork can support the planned connection and how the system will be used through Ottawa’s heating and cooling seasons.

HRAI-trained ventilation and residential air-system design
Practical recommendations for new and existing homes
Directly employed installers and service technicians
Clear written quotes with no-pressure advice

AirZone HVAC Services office team supporting HRV and ERV installations in Ottawa

Fresh air without guesswork

Get an HRV or ERV Recommendation for Your Home

Tell us about your current ventilation, humidity concerns and comfort goals. AirZone will help you compare practical options and provide a clear written quote.

Request a Free Quote Call 613-592-5770

HRV and ERV FAQ

Ventilation Questions Ottawa Homeowners Ask

These answers cover common questions about system selection, humidity, operation, installation and maintenance.

What is the difference between an HRV and an ERV?

Both systems bring outdoor air into the home, exhaust stale indoor air and transfer heat between the two isolated air streams. An HRV transfers heat but allows indoor moisture to leave with the exhaust air. An ERV transfers heat and a portion of the moisture, helping moderate humidity transfer during winter and summer.

Should I choose an HRV or ERV for my Ottawa home?

Choose based on the home’s moisture pattern, occupancy, construction and year-round use. An HRV may be better when winter condensation and excess indoor humidity are the main concerns. An ERV may be better when the home becomes too dry in winter or when year-round ventilation during humid summer weather is important. AirZone can review the complete situation before recommending a unit.

Does an ERV work like a dehumidifier?

No. An ERV can reduce how much outdoor moisture enters with the ventilation air by transferring part of that moisture to the outgoing air stream. It does not actively remove water like a refrigerant-based dehumidifier. A home with significant basement or whole-home humidity may still need source correction, air-conditioning changes or dedicated dehumidification.

Should an HRV or ERV run continuously?

Many systems are designed to run continuously at a low speed and switch to a higher boost speed when extra ventilation is needed. The correct setting depends on the equipment, airflow design, occupancy and humidity. Turning the unit off for long periods may allow stale air and moisture to accumulate, so follow the manufacturer’s instructions and the settings recommended during commissioning.

Can an HRV help with condensation on windows?

An HRV can help when condensation is caused by excess indoor humidity and insufficient ventilation. It will not correct every source of moisture or a window problem. Humidifier settings, bathroom exhaust, cooking, basement moisture, occupancy, window temperature and ventilation airflow should all be considered.

How often should HRV and ERV filters be cleaned?

Many manufacturers recommend checking and cleaning reusable filters approximately every one to three months, but the exact schedule depends on the unit and operating conditions. Exterior hoods, drains, grilles and the recovery core also require periodic attention. Always follow the owner’s manual because HRV and ERV core-cleaning instructions can differ.

Can an HRV or ERV be installed in an existing home?

Yes. Many existing homes can accommodate an HRV or ERV through dedicated ductwork, a partially dedicated design or a connection to a compatible forced-air HVAC system. Available space, exterior wall access, duct routing, furnace operation and balancing requirements determine the best installation approach.

Does an HRV or ERV replace bathroom exhaust fans?

It depends on the ventilation design. Some fully dedicated systems exhaust bathrooms through the HRV or ERV and use boost controls for showers. Other homes retain separate bathroom fans. A range hood should still exhaust cooking contaminants directly outdoors. AirZone can review the duct layout and local requirements before recommending a design.

Does AirZone service Lifebreath and Venmar HRVs in Ottawa?

AirZone services many HRV and ERV systems found in Ottawa homes. Service options and parts availability depend on the manufacturer, model and age of the equipment. When booking service for Lifebreath, Venmar, Lennox, Vanee, Panasonic, Aldes or another brand, provide the model and serial number so our team can confirm the correct service path.

Available ventilation equipment