🍃 Air Purifier Selection

Air Purifier Selection Tool

Choose the right air purifier or filtration upgrade for your Canadian home. Get a recommendation based on room size, your main air quality concern, and whether wildfire smoke season is a factor.

📋 Project Info (optional, appears on printed report)

Project / Client

Address

Prepared By

📏 Coverage Needed

Room Floor Area

m²

😷 Primary Concern

🌀 Existing Ductwork

🍃 Filtration Recommendation

Suitability

Suitability by Filtration Type

Key Considerations

📊 Suitability Score Comparison

Full Comparison Table

Filtration Type	Suitability Score	Coverage	Recommended Filter Level

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How to Use the Air Purifier Selection Tool

Select Coverage Need

Choose whether you're treating a single room, like a bedroom or nursery, or looking for whole-home air quality improvement.

Select Your Primary Concern

Choose the air quality issue that matters most to you. Different concerns respond better to different filter types and ratings.

Select Existing Ductwork

This determines whether in-duct filtration upgrades are an option, or whether portable purifiers are the practical choice.

Get Your Recommendation

Click Get Recommendation to see a suitability score for portable, in-duct, and whole-home filtration options.

Choosing the Right Air Filtration Option

Indoor air quality concerns range from seasonal allergies to wildfire smoke that's become a more frequent summer occurrence across much of Canada. The right filtration approach depends on how much of the home you need to treat and what specifically you're trying to filter out.

Portable Air Purifiers

Portable HEPA air purifiers work well for treating a single room, such as a bedroom or nursery, and don't require any ductwork or installation beyond a power outlet. Sizing matters here: a unit's clean air delivery rate needs to match the room's square footage, which you can check with a HEPA filter calculator before buying, or it will struggle to keep up with a larger space. These are also the only practical option in homes without forced-air ductwork.

In-Duct Filtration Upgrades

If your home already has forced-air ductwork, upgrading the furnace filter to a higher MERV rating treats air throughout the whole house every time the system runs, without adding separate equipment. This is often the most cost-effective way to improve general air quality, though not every furnace can handle a high-MERV filter without airflow or static pressure issues, so it's worth running your system through a static pressure calculator to check equipment compatibility first.

Dedicated Whole-Home Air Purifiers

For more serious or persistent air quality concerns, a dedicated whole-home air purifier installs alongside your ductwork and provides stronger filtration than a standard furnace filter upgrade, similar in concept to a portable HEPA unit but sized and installed to treat the whole home's airflow.

Wildfire Smoke Considerations

Wildfire smoke season has become a recurring concern in many parts of Canada. A MERV 13 in-duct filter is commonly recommended for capturing the fine particulate matter found in smoke, provided your furnace can support it, and the EPA's indoor air filtration factsheet compares in-duct filters, portable cleaners, and DIY options in more detail. Portable HEPA units with activated carbon can also help with a specific room, particularly a bedroom, during smoke events.

Combining Filtration with Ventilation

Filtration and ventilation work together but solve different problems. Filtration removes particles from air already inside the home, while ventilation exchanges indoor air for outdoor air, a distinction covered in Health Canada's ventilation and indoor air quality guidance. During wildfire smoke events, it's often better to reduce fresh air intake and rely more heavily on filtration and recirculation until air quality improves. See the HRV vs ERV selection calculator for more on balanced ventilation systems.

Frequently Asked Questions

For wildfire smoke, a MERV 13 filter is commonly recommended for in-duct systems since it captures a high percentage of the fine particulate matter found in smoke. Some furnaces and air handlers cannot support MERV 13 without a static pressure or airflow problem, so it's worth checking your equipment's compatibility or working with a contractor before upgrading during smoke season.

Yes, a properly sized portable HEPA air purifier can meaningfully reduce airborne allergens like pollen, pet dander, and dust in the room where it's placed. The key is matching the unit's clean air delivery rate to the room size, since an undersized unit will struggle to keep up with a larger space.

In-duct filtration treats air throughout the whole home every time the furnace fan runs, making it more convenient for whole-home coverage without moving equipment between rooms. Portable purifiers offer more concentrated filtration in a specific room and work in homes without ductwork, but they only treat the room they're placed in.

Upgrading to a higher MERV-rated furnace filter is often the most cost-effective first step for whole-home air quality, provided your furnace and ductwork can handle the increased airflow restriction. This won't match the filtration power of a dedicated whole-home air purifier for finer particles, but it improves general air quality every time the system runs without adding new equipment.