The short answer: close up the house, run your HVAC fan continuously through the best filter your system can handle, and let purpose-built filtration — not open windows — manage the air. Wildfire smoke is fine particulate (PM2.5) that standard builder-grade filters barely touch, so the equipment details matter.
What filtration actually captures smoke?
Smoke particles need dense media: a properly fitted high-MERV filter or a dedicated HEPA filtration unit. There's a catch most homeowners don't hear about — jam a high-resistance filter into a system whose blower and ductwork weren't designed for it, and you starve airflow, which is its own failure mode. The filter, the blower, and the duct design have to be matched.
Do air purifiers and UV lights help?
They solve different problems. Media and HEPA filtration capture particulates like smoke; air purifiers add another capture stage; UV germicidal lights target biological growth on coils and in ducts rather than smoke. During smoke season, filtration does the heavy lifting — UV is a year-round hygiene upgrade, not a smoke solution.
What about ventilation when the air outside is bad?
Homes still need fresh air even during smoke events. Balanced ventilation with filtration on the intake side lets you bring in outside air without bringing in the smoke — a far better answer than the choice between stale indoor air and open windows.
Because we fabricate ductwork in our own Maple Ridge shop, Big Valley can correct the airflow-vs-filtration trade-off at the duct level instead of just selling a filter — a capability most HVAC-only shops can't offer.
Book an Air Quality Assessment
We'll check what your current system can support and quote realistic upgrade options.