Air Filtration

Not always. A high-MERV filter catches finer particles but also restricts airflow. On systems designed for them (with media filter cabinets or oversized filter racks), high-MERV is fine; on standard 1-inch filter housings, high-MERV can push the system into high-static-pressure territory that hurts airflow and wears the blower. We measure first, then recommend.

A media filter is a 4-inch or 5-inch deep pleated filter in a dedicated cabinet — much more surface area than a 1-inch filter, so it catches more without restricting airflow as much, and it lasts 6–12 months instead of 1–3. For homes with pets, allergies, or wildfire-smoke-season concerns, the upgrade is often worth it. The install involves adding a cabinet to the return side of the system; retrofit feasibility depends on existing geometry.

Significantly — a high-MERV filter catches most of the fine particulate smoke that comes in through infiltration. The system also has to run (so smoke-laden indoor air gets pulled through the filter), which is the opposite of what some homeowners do (turn off HVAC thinking it'll keep smoke out). We walk through smoke-season operation during install or service.

Standard 1-inch pleated filters: typically every 1–3 months, more often with pets or during cottonwood/wildfire season. 4-inch and 5-inch media filters: typically every 6–12 months. The real answer is 'before the pressure drop across it gets too high' — if we're on a maintenance visit, we check the actual condition rather than relying on a calendar.