Airing it Out with Air Vent - Episode 4 - 2nd Most Common Attic Ventilation Mistake

Sometimes a homeowner or a roofing contractor or even the HVAC contractor during a house call suggests adding a second type of attic exhaust vent to boost the vents already in place. In this episode of Airing it Out with Air Vent, residential roofing pros share their first-hand stories of why mixing types of attic exhaust vents is a problem to avoid.

[juaninglis]

The biggest issue I see is the lack of intake. I bet in most of these cases listed the issue was no to little intake. On the outside it looks as if the soffits are vented, but they are not. At some point someone put aluminum soffits over wood soffits without cutting holes into the wood soffit. And even if it was done correctly (only 5-10% of the time) they didn't install sufficient intake. I always recommend to clients to eliminate power vents. I think this issue is a bigger deal with power vents, but I could see it being an issue (to a smaller degree) with mixing Ridge and box vents.