Home Ventilation & Indoor Air Quality: ERVs, Exhaust Fans, MERV-13 Filters (with Ken Nelson from Panasonic)

Home ventilation with Ken from Panasonic: ERVs, bath and kitchen exhaust fans, crawlspace moisture and MERV-13 filters for better indoor air.

Ventilation is the single biggest thing you can do to keep your home healthy, and John and I got into it with Ken from Panasonic. We talked about why the dusty little $29 fan most builders put in isn't cutting it, and why a quality fan with a real ECM motor pays for itself. Ken has one humming away in his own crawl space that's been running for 18 years.

We broke down ERVs: two fans and a special membrane core that swaps heat and moisture, so you get fresh air without a runaway energy bill. Then the part nobody wants to hear: check those filters. In wildfire smoke or high-pollution areas you may be changing them monthly, and a MERV-13 filter makes a real difference.

We also busted a few myths. An open window isn't always ventilation, because air needs pressure differences to move. Over-the-range microwaves are about the worst "hood" you can buy. And recirculating hoods just push the grease and gunk around. Kitchens, garages and crawl spaces all make moisture and fumes that feed mold, so vent fans to the outside, not into the attic.

In this episode:

- Why cheap bath fans are a false economy, and what ECM motors bring to the table

- How an ERV works and why it saves energy

- MERV-13 filters and how often to change them in wildfire or smoky air

- Smart controls that can pause outside air when air quality is bad, and what they cost

- Why open windows aren't reliable ventilation

- Over-the-range microwaves vs. a properly ducted kitchen hood

- Garage and crawlspace ventilation to keep moisture and mold out