Air Quality

Last reviewed: September 14, 2026 · Aire One Peel Heating & Cooling, Mississauga

Where to start with indoor air quality

Health Canada’s order is simple: remove the source of the pollutant first, then ventilate, then clean the air. An air cleaner helps most once the first two steps are done. Our 3-step indoor air quality guide explains each step for Ontario homes.

Filters and air cleaners

The furnace filter is your first air cleaner, and its life depends on thickness: about 60 to 90 days for a 1-inch pleated filter, 3 to 6 months for a 4-inch media filter and 6 to 12 months for a 5-inch cabinet. Pets, renovation dust and outdoor smoke shorten every interval. See how often to replace air filters. For more filtration, our home air treatment service installs Carrier air cleaners, including HEPA and Infinity models.

Humidity

Health Canada advises keeping indoor relative humidity between 30 and 50 per cent. In winter, start around 30 per cent and lower it if windows fog up; indoor humidity in winter explains why. For dry winter air, we install Carrier humidifiers. In summer, a home that stays clammy with the AC on often has an oversized or short-cycling system. See why your AC is not removing humidity.

Duct and vent cleaning

Duct cleaning is worth it in specific cases: substantial visible mould inside hard ducts, rodents or insects, or debris that blows out of the registers. It is not a routine item every home needs. Read is air duct cleaning worth it in Ontario?, then book vent and air duct cleaning if your ducts show those signs.

A plan for your home

Every house is different, so we start by looking at the home and the causes of poor air quality, then recommend a plan that fits it. Installation estimates are free. Call 905-564-8545 to book.

Areas we serve

We improve indoor air quality in homes across Mississauga, Brampton, Georgetown, Bolton, Caledon, Milton and Etobicoke.

Indoor air quality questions

Do I need an air purifier if I have a good furnace filter?

Not always. For most Peel Region homes with a 1-inch filter slot, a MERV 8 to 11 filter changed on time handles everyday dust. A whole-home air cleaner is worth considering if someone in the home has allergies or asthma, or if outdoor smoke is a recurring problem. Remove pollutant sources and fix ventilation first.

What does a home air quality assessment involve?

We look at the house and the likely causes of poor air, such as humidity, ventilation, filtration and dust sources. Then we go over the results with you and recommend a plan that fits your home. Call 905-564-8545 to book.

How often should air ducts be cleaned?

There is no fixed schedule, and no Ontario or federal health agency lists duct cleaning as routine maintenance. Clean ducts when there is a clear reason: substantial visible mould inside hard ducts, signs of rodents or insects, or debris blowing out of the registers.

What humidity level should I keep in my home?

Health Canada advises 30 to 50 per cent relative humidity. In winter, around 30 per cent is a good starting point, lowered if windows start to fog. In summer, stay at or below 50 per cent to limit mould growth.