HRV and ERV Ventilation in Smithville, ON — Which One Your House Needs, and How Often to Clean It

HRV installation in Smithville usually starts with a house that feels stuffy, or a box already hanging in the basement that nobody has opened in years. A heat recovery ventilator swaps the stale air in your house for fresh air from outside. It takes the heat off the outgoing air on the way, so you are not paying to warm the replacement. This page covers which type suits a Niagara house, and the cleaning almost nobody does.

What an HRV Actually Does in a Smithville House

It brings outdoor air in and pushes indoor air out at the same time, continuously. The two streams pass each other through a core inside the unit, and heat crosses from one to the other while the air never mixes. (2) Fresh air, without throwing away the heat you paid for.

These exist because of the way houses are built now. Over the last 25 years, as building envelopes have become tighter, they also became less able to breathe on their own and need fresh air. (1) Health Canada says the same: mechanical ventilation is required to achieve good indoor air quality in airtight houses. (3)

This is where a lot of confusion about air quality gets settled. A furnace filter cleans the air already in your house; ventilation replaces it. Filtration works best on particles, Health Canada says, and can be expensive or ineffective for gases. (3) So if the complaint is dust, a filter is the answer. When the complaint is that the air feels used, it is not.

One thing worth knowing if you already have a unit: the filter inside it is not cleaning your air. That filter does not remove very small particles, Health Canada is explicit, because it is only there to stop insects and large debris getting into the machine. (3) Some units now come with a high efficiency particulate filter, but that is an option rather than the standard. (3)

Inadequate air exchange can cause poor indoor air quality, high humidity, and cold-weather window condensation. (3) Newer builds around Smithville and Grimsby have a unit for that reason, and most owners have never opened it.

HRV or ERV: Which One a Niagara House Needs

An HRV moves heat. An ERV moves heat and moisture. (1)(2) That is the entire difference.

In practice it decides what happens to the humidity in your house. An ERV holds some moisture in during a dry winter, and keeps some of it out during a humid summer. (1) The HRV leaves moisture alone and deals only with temperature.

So the choice follows what your house already does. A Smithville house dry enough in January that someone fitted a humidifier is arguing for an ERV, and so is one whose basement is damp every July. If neither describes yours, an HRV is fine.

Then ask for one number. Sensible recovery efficiency, or SRE, is how much of the heat in the outgoing air the unit puts back into the incoming air. To be ENERGY STAR certified in Canada a unit has to reach 65 percent SRE at 0°C and 60 percent at −25°C, under the specification in force since 13 December 2021. (4)

The second figure is the one that matters here. A unit rated only at 0°C tells you nothing about a February morning in Niagara, which is exactly when you need it working. We fit LifeBreath and VanEE.

Cleaning an HRV, and What Happens When Nobody Does

Every two months. HRV and ERV filters must be vacuumed or washed at least every second month so that air flows are not affected, Health Canada says. (3) Most units in Smithville basements have never had it done.

The reason is worth understanding, because it is not about dirt. A blocked filter throttles how much air the unit can move. The fans keep running, the unit still sounds like it is working, and the amount of fresh air reaching the house quietly falls. Nothing tells you it has happened.

There are two filters, not one, and the second gets forgotten. There is one on the fresh air supply side and another on the exhaust side, and the second needs cleaning or replacing to keep the heat exchange core uncontaminated. (3) The core itself comes out and gets washed, and the drain carrying away the water that condenses inside the unit has to stay clear.

We clean HRVs and ERVs as well as installing them. A unit hanging in an unfinished corner of a Smithville basement is the one most likely to have been forgotten, because nobody walks past it.

Older Smithville Houses Without One

Most older houses here do not need one, and that is the honest answer. An older house leaks enough air through its own gaps to exchange the air without help, so adding a ventilator solves a problem it does not have.

There is one exception, and it catches people. A house tightened up by renovation can cross the line without anyone deciding to: new windows, spray foam in the attic, air sealing during a basement finish, and the house that used to breathe stops.

The signs are windows fogging on cold mornings, air that feels heavy, and damp that will not clear. If that describes an older house, the question is whether it is still leaky or has quietly been sealed up.

What Affects HRV Installation Cost in Smithville

Five things about the house move the quote:

• whether there is ductwork the unit can tie into, or whether it needs its own runs
• where the unit can hang, and whether two exterior wall openings can be made near it
• how far the drain has to run from the unit to reach somewhere it can drain
• whether it is an HRV or an ERV, and the SRE rating you choose
• how far the property sits from the office, out toward Caledonia and West Lincoln

The one people do not expect is the pair of holes. A ventilator needs one opening bringing air in and another sending it out, far enough apart that it does not draw back what it just expelled. Where those can go often decides where the unit ends up.

HRV and ERV Questions From Smithville Homeowners

What is the difference between an HRV and an ERV?

An HRV transfers heat, and an ERV transfers heat and moisture. (1)(2) The moisture part is what makes an ERV worth considering in a house that runs dry in winter or damp in summer.

How often should an HRV be cleaned?

The filters need vacuuming or washing at least every second month, which is Health Canada’s own figure. (3)

Does an HRV run all the time?

Yes, continuously at a low speed, which is what makes it ventilation rather than a fan you switch on. Most have a boost setting as well.

My house feels stuffy. Is an HRV the answer?

If the house is tight, yes, because stuffiness is a ventilation problem rather than a dust problem. (3) If the house is older and has never been sealed up, it is more likely a damp or airflow question, so call the office and describe what you are noticing.

Book an HRV or ERV Visit in Smithville

Call the office with the age of the house, whether there is already a box in the basement with two insulated pipes running outside, and what the air feels like. Mike Peddle holds a TSSA Heating Contractor registration, and Environmental Heating & Cooling has been family-owned in Smithville since 2014. We cover Grimsby, Beamsville, Caledonia and West Lincoln as well.

Where the air is the problem but a ventilator is not the answer, the category page covers what else changes how a house breathes.

References

1. Natural Resources Canada, What's a heat/energy recovery ventilator and why do I need one?, natural-resources.canada.ca
2. Natural Resources Canada, Heat-recovery ventilators and energy-recovery ventilators, natural-resources.canada.ca
3. Health Canada, Ventilation and the indoor environment, canada.ca
4. Natural Resources Canada, Heat/energy recovery ventilators (HRVs) and (ERVs) — ENERGY STAR technical specifications, natural-resources.canada.ca