Air Filters Manitoba

Air quality in Manitoba

• Northern wildfire smoke
• Long heating season
• Prairie & harvest dust
• Spring flooding & damp basements
• Livestock & farm odours
• Ragweed & poplar pollen

Wildfire smoke has become Manitoba's most serious air quality issue. The boreal forest that covers much of the north burns every summer, and in 2025 fires forced the evacuation of Flin Flon and dozens of northern and First Nations communities, sending thick smoke south over Winnipeg, the Interlake and the Parkland. Smoke from Saskatchewan, northwestern Ontario and the NWT regularly drifts across the province as well, and fine particles (PM2.5) slip straight through basic fibreglass filters.

In the agricultural south, the wide-open prairie lets wind lift soil, seed and harvest dust from canola, wheat and soybean fields into towns like Portage la Prairie, Carman, Morden and Winkler. Hog barns and cattle operations add dust and odour in parts of the Southeast and Westman, and gravel back roads turn into dust clouds every dry summer. Potato processing around Portage and Carberry, a large pork plant in Brandon and grain handling across the province add industrial dust and smells near those facilities.

Water is the other factor. The Red River Valley, the Assiniboine and the Interlake are prone to spring flooding and high water tables, and many basements stay damp well into summer, leading to mould growth that spreads spores through ductwork. Late-summer ragweed and spring poplar and elm pollen round out a challenging year for allergy sufferers.

Manitoba climate, homes & HVAC systems

Manitoba has an extreme continental climate: long, bitterly cold winters where temperatures can fall below –30 °C, and short, hot, often humid summers. Furnaces run from October well into April or May, and in the north – Thompson, The Pas and Churchill – even longer. Air conditioning is common in the south from June through August, so the HVAC fan is busy for most of the year.

In southern Manitoba, high-efficiency natural gas furnaces are the norm, while many rural and northern homes heat with electric furnaces, propane or wood. Manitoba also has one of the highest rates of ground-source (geothermal) heat pumps in Canada, and air-source heat pumps are increasingly popular. Older farmhouses and town homes often have 1-inch filter slots, newer homes tend to have 4- or 5-inch media cabinets, and HRVs are standard in recent builds.

Which MERV rating is right for your Manitoba home?

MERV (Minimum Efficiency Reporting Value) measures how well a filter captures particles of different sizes under the ASHRAE 52.2 test standard. Higher numbers catch smaller particles. Most residential furnaces in Canada run well on MERV 8 to MERV 13 – here is how to choose:

Not sure? Read our complete MERV rating guide. If you are moving up to MERV 13 on an older furnace, a deeper 2-inch or 4-inch filter keeps airflow healthy.

Popular furnace filter sizes in Manitoba

These standard sizes fit most Manitoba furnaces. Newer homes often take 4-inch or 5-inch filters, and geothermal and older units may need a special size.

How often to change your furnace filter in Manitoba

Filter depth	Typical home	Pets, allergies or smoke
1-inch	Every 1–3 months	Every 30–45 days
2-inch	Every 3–4 months	Every 2 months
4-inch	Every 6–9 months	Every 4–6 months
5-inch	Every 9–12 months	Every 6 months

In Manitoba, change the filter right after any smoke event, and more often during harvest if you live near fields or gravel roads. See the full filter changing guide.

Air filters for Manitoba businesses & property managers

Manitoba's economy spans agriculture and food processing, manufacturing, mining in Thompson and Flin Flon, hydroelectric operations in the north, and hospitals, personal care homes, schools and universities in every region. Barns, grain facilities, processing plants and commercial buildings all depend on ventilation that needs regular filter changes.

We supply farms, contractors, facility managers and property owners across Manitoba with pleated, pocket, rigid cell and wire panel filters, plus media pads and rolls. Set up a business account for volume pricing and scheduled orders.

• Pleated filters in 1", 2" and 4" depths, MERV 8–13
• Pocket (bag) filters, rigid cell and V-bank filters for rooftop units and air handlers
• Wire panel, HEPA, carbon and media pads & rolls
• Volume pricing, scheduled deliveries and NET terms for approved business accounts

Shipping & delivery to Manitoba

Orders to Manitoba ship for $35 flat rate. Most orders arrive in 3–9 business days, with no customs or duties because everything ships from within Canada.

Standard sizes are usually made and shipped within 1–2 weeks; custom sizes can take up to 3 weeks. Prefer to collect? Free pickup is available Monday to Friday, 7:00 AM – 4:30 PM at 15 Melanie Drive, Brampton. Full details are on our shipping & returns page.

Cities and towns we serve in Manitoba

Areas we deliver to across Manitoba

Winnipeg · Brandon · Steinbach · Portage la Prairie · Winkler · Morden · Selkirk · Thompson · Dauphin · The Pas · Flin Flon · Niverville · Altona · Neepawa · Gimli · Stonewall · Virden · Swan River · Carman · Churchill

Nearby location pages: Ontario, Quebec, British Columbia, Alberta, Nova Scotia, Saskatchewan, New Brunswick, Newfoundland and Labrador, Prince Edward Island, Yukon, Northwest Territories & Nunavut. Or see all locations we deliver to.

Manitoba air filter FAQ

Helpful air quality guides