Indoor Air Is 2–5× More Polluted Than Outdoor Air — Bring in Fresh Air Without Wasting Energy
Heat Recovery Ventilators (HRV) and Energy Recovery Ventilators (ERV) exchange stale indoor air for fresh outdoor air while recovering up to 80% of the heat from the outgoing air — no energy waste, no cold drafts.
How Heat Recovery Ventilation Works
Fresh, filtered air in — stale air out — without throwing away the heat you paid for. Two quick explainers.
Modern Homes Are Too Tight — Without Ventilation, Air Quality Deteriorates
Modern energy-efficient construction creates tight building envelopes. This is great for heat retention but terrible for air quality. Without intentional ventilation, CO₂ levels build, humidity concentrates, VOCs accumulate from paint, flooring, and cleaning products — and Calgary's cold winters mean windows stay closed for months.
Simply opening a window wastes the heat you paid for. An HRV solves this: it exchanges the stale, humid indoor air with fresh outdoor air while transferring the heat from the outgoing air to the incoming air — so you get fresh air without the energy penalty.
- Reduces CO₂, VOCs, and excess moisture that accumulate in tight homes
- Recovers 70–80% of the heat from exhausted air
- Continuously balanced ventilation — no drafts, no pressure imbalances
- Required by Alberta Building Code in all new homes built since 2014
Top 5 Benefits of having an HRV in your home.
Your home's indoor quality (IAQ) could be 2-5 times worse than the outdoor air. Newer homes are at a high risk since tighter homes leak less to outside thus trapping air inside - thus the need of a better ventilation system.
With the Covid-19 Pandemic happening all over the world, our houses keep us somehow feel safer by staying indoors and keeping up to date on the news, little do we know that deadly stuff are just lurking around every corner of our house! Yes! Dust and bacteria are some of the reasons why we develop lung and skin illnesses, and oh boy! the damage caused by intense heat and humidity may expose us to having heat stroke! But don't fret! because there is hope.
Signs of Poor Indoor Air Quality
If your home's air isn't being properly exchanged, your body usually tells you first. Watch for:
- Sore or irritated eyes
- Feeling of suffocation
- Dry, sore throat, coughing
- Fatigue, headaches
- Agitation, anxiety
- Dizziness, sleeplessness
- Psoriasis, palpitations
- Nausea, numbness
- Cold sensitivity
Dust and bacteria trapped in a tightly sealed home are a real source of lung and skin irritation — and the extra heat and humidity that builds up without proper ventilation can compound the problem. An HRV is how you bring in genuinely fresh air without giving up the heat you paid for.
Which System Is Right for Your Home?
HRV — Heat Recovery Ventilator
Transfers heat from outgoing stale air to incoming fresh air. Does not transfer moisture — the outgoing moisture is exhausted outside. Best choice for Calgary's climate, where winter humidity is typically too high indoors (condensation, mold risk) and needs to be reduced alongside ventilation.
- Best for Calgary's heating-dominant climate
- Reduces excess indoor humidity while ventilating
- Recovers 70–80% of outgoing heat energy
- Correct choice for most Alberta residential applications
ERV — Energy Recovery Ventilator
Transfers both heat AND moisture from outgoing air to incoming air. Best for very dry climates or buildings where maintaining indoor humidity is critical (art studios, specialty storage, wine cellars). Transfers some moisture back — can reduce the need for humidifiers in very dry conditions.
- Transfers heat and moisture simultaneously
- Better for homes with very dry indoor conditions
- Reduces dehumidification load in summer
- Less common in Calgary's typical residential applications
Choosing Between HRV and ERV — In Our Own Words
The best choice between an ERV and an HRV is dependent on the climate and specific needs.
If your house is too humid in winter (above 60% RH) then an HRV is the better choice, as it would surely get rid of excess humidity while an ERV would tend to keep it at a high level.
If your house is too dry in winter, then an ERV would be a better choice as it helps retain humidity, eliminating the need (and cost) for you to generate it through other means.
In summer, the use of an HRV will normally increase the level of humidity inside your home, so an ERV is greater in hot and humid zones. But a dedicated dehumidifier will highly likely do the trick there. At the very least, the ERV will lower the load on the air conditioning system, even if it can't keep up with the high humidity level on the outside.
Therefore, there is not one right choice between ERV & HRV systems. It totally depends on the climate, lifestyle and the home itself.
When You Need HRV Service
New Build Installation
Alberta Building Code requires mechanical ventilation in all new homes built since 2014. We install HRVs during construction or as rough-in-ready upgrades — fully integrated with the HVAC system from day one.
Existing Home Retrofit
Older homes without HRVs often have chronic air quality issues — persistent odours, condensation on windows, elevated humidity. A retrofit HRV installation connects to your existing duct system and operates independently through its own controller.
HRV Service & Maintenance
HRVs require annual filter cleaning and core inspection. A dirty or failing HRV becomes a source of contamination rather than a solution — we service all brands and models, including defrost function verification critical for Calgary winters.
HRV Replacement
HRVs have a lifespan of 15–20 years. We assess your existing unit, check core condition and motor performance, and advise on service versus replacement. Newer models offer significantly improved efficiency and quieter operation.
Benefits of Having an HRV at Home
It Cleans the Air You Breathe
A healthy home starts with clean air, which is harder to come by today because of pollution. Your Heat Recovery Ventilation system uses the temperature of the outgoing stale air to pre-heat and condition the incoming fresh air — while helping keep dust and other pollutants from entering your home.
In our own words: "A healthy home requires clean air, which is difficult nowadays due to pollution. Introducing the Heat Recovery Ventilation system. When installed at home, it uses the temperature of the stale exhaust or the outgoing air to pre-heat and condition the incoming air at your home. HRV also helps maintain and reduce pollutants such as dust to enter to your home."
Energy Efficient
An HRV system is genuinely cost-efficient. Because it exchanges your air for you instead of relying on extra fans or extra HVAC runtime, you use less energy — meaning real savings on your utility bills, a smaller carbon footprint, and a safer, healthier home for your family.
In our own words: "Having an HRV system at your home is very cost efficient! You can SAVE hundreds of dollars to your electricity bill, because instead of you using turning on the air conditioner at your room or blowing the air on your electric fans you will now have an - all-in-one system that will do the job for you! Lesser usage of appliances means MORE savings on your utility bills and you also contribute to lesser carbon use on the planet and provide a safer and healthier home for your family!"
Avoids Condensation
Condensation is one of the most common problems homeowners deal with, and one of the most common sources of moisture in a home. An HRV removes the water vapour that would otherwise condense, helping prevent dampness, rot, and mold growth.
In our own words: "Condensation is one of the most prevalent problems that homeowners have, and it is also the most common source of moisture in homes. The HRV system will eliminate all of the water vapor created, resulting in no moisture condensation and the prevention of dampness, rot and mold growth."
Convenient in Terms of Size
A heat recovery ventilation system is small enough to fit in a basement, attic, or attached garage. The primary control unit is typically installed in the utility room or kitchen, but it can be installed anywhere in the house to meet your needs.
In our own words: "The heat recovery ventilation system is small enough to fit your basement, attic, or adjoining garage. Some types can be installed in a hot-press in the kitchen. The primary control unit is typically installed in the utility room or kitchen, but it can be installed anywhere in the house to meet your needs."
HRV Service Required Annually in Calgary
Calgary's harsh winters mean your HRV defrost cycle must be tested. A frozen HRV core blocks ventilation entirely — and you won't know it's happened without a service check.
HRV Questions
Do I need an HRV if my home already has a furnace?
Yes — they serve completely different functions. A furnace heats air. An HRV exchanges air. Recirculating heated air doesn't replace fresh air — it just moves the same stale air around. The only way to bring in genuine fresh air while recovering heat is a dedicated ventilation system like an HRV.
How do I know if my HRV is working properly?
Signs of a failing HRV: windows fogging up or developing condensation (excess moisture not being removed), musty or stale odours despite running the unit, frost forming on the exterior intake during cold weather (defrost failure). An annual service appointment catches these before they become problems.
Can I install an HRV in a home without existing ductwork?
Yes, with a ductless (point-source) HRV installed through an exterior wall. These units ventilate one room at a time rather than the whole house simultaneously. For whole-home ventilation in a ductless home, multiple point-source units may be needed. We assess the best solution for your home's layout.
What maintenance does an HRV need?
Annual service: clean the air filters (every 2–3 months is ideal during high-use periods), inspect the heat exchange core for contamination, check the defrost system, verify balanced airflow, and confirm all dampers and controls are functioning. Most HRV failures in Calgary are caused by deferred filter cleaning leading to core contamination.
HRV Installation & Service Across Calgary & Area
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Our Recent Heat Recovery Ventilator Work in Calgary
Fresh Air. Zero Energy Waste.
HRV and ERV installation, service, and replacement across Calgary. New builds and retrofits.
Last updated: July 2026
