Attic Ventilation Educational Video: 2nd Installment (Shortened version of “Ask the Expert” Seminar)

0:00 Introduction
1:03 Why Ventilate the Attic?
6:30 To Work Properly, Attic Ventilation Must be Balanced, Intake and Exhaust
8:09 Match the Vent Category to the Roof’s Design for Best Performance
8:50 Understanding the Importance of a Vent’s NFA or CFM
10:32 Pros and Cons of the Five Exhaust Vent Categories
20:59 Net Free Area, Thermal Effect, and the Wind
23:40 The External Wind Baffle Makes a World of Difference (The Bernoulli Effect)
25:54 An Overview of Intake Vent Categories
28:42 Traditional Attics and Vaulted Ceilings
31:10 Calculating How Much Attic Ventilation is Needed
This video is extracted from the annual Air Vent Seminar “Attic Ventilation: Ask the Expert™” held in-person and virtually for roofing professionals across North America every 1st quarter. The seminar is an overview of residential attic ventilation best practices and solutions.
airvent.com/ate

[@chuckhall5347]

This is the only person I have seen that has a proper attitude toward attic ventilation! Excitement! I love this guy.

[@sinside318]

Give this guy a Ted talk!!

[@aj1201]

Awesome enthusiasm! Good intel and genuine!

[@thebearclaw0]

I like this dudes energy for attic info. Honestly I like it

[@superman19572857]

Been following this guy for many years. Best in the industry.

[@RJG772]

Quite helpful.

[@ghmichel72]

Paul is a great "Ask the Expert" presenter ✊🏾 I need all of the products after watching him! Inquiry: I bought a house that was built in 1979. The roof is in great condition but it does not have any attic vents but does have what seems to be siding soffits. I will be installing your ridge vents. However, should I still install your Edge Vents?

[@carlcarl9290]

Wow very interesting and valuable information!!

[@davidshumway9639]

Posting this before watching. If my soffit vents net free air calculates to 13 sq in / lin ft, and I put a 20 net free air ridge vent on, does that really matter? I know the ridge is supposed to equal 50% or less than the sum, so one would think that I should be looking for a ridge vent with a Nfa of 13 or less. But...., the actual ridge Nfa was determined by my builder when he cut the gap at the ridge, right? So if that gap square inches works out to less than 50 percent of the total sum, then the size of the hood doesn't matter right? I like the rigid vent better than the rolled, but I'm concerned that I might over size it and reverse the air flow. But I think the gap is the regulator and not the cap. Like the size of the carburator is what dictated cfm, not the size of the breather. Right?

[@hmdwn]

This too funny!

[@renurenovationsllc7780]

Now find a way to eliminate the restrictive filter in the ridgevent. The filter cuts the air flow by greater then 50%

[@bokononisti2820]

Yeah, and the "baffle them with BS" about ridge vent in general. Far more important than the supposed hot and cold spots that ridge vent solves is the amount of air exchange. A ridge vent cannot compete with a fan in this regard. But ridge vent is a more profitable product for manufacturer and for installer.

[@renurenovationsllc7780]

@@bokononisti2820 A properly balanced, baffled not filtered ridge vent exchanges attic air 10X per hour, which is plenty to keep attic temperatures minimally higher than ambient temperature. I would never install a fan in my own house. Ridge vent is Much better looking, as effective, and longer lasting than the 5-10 year warranty fan. One that does nothing for moisture buildup in the winter?

[@bokononisti2820]

@@renurenovationsllc7780 Everyone I have heard from with ridge vent has a very hot attic. The idea that ridge vent is going to move as much air on a non-windy day as a fan is laughable. There's a reason why a whole house fan can cool down an attic very quickly - it's moving a lot of air. And you can get a similar effect with sufficient intakes to supply the exhaust fan on roof or gable end. Never going to match that with passive venting. Agreed that ridge vent is better looking - essentially its only selling point for people who aren't taken in by the marketing BS. Longer lasting? I replaced a fan this year - purchased in 2000, DIY installed. $50 + a bit of DIY labor for 24 years of service. Replacement was $100 (thanks to inflation), but installation was very easy. But yeah, let me spend 20-30x more to have someone cut open my roof's ridge and install a good looking, but inferior product. And then let me spend time cleaning out all the roofing debris that got dumped over anything I have stored in the attic when they cut the entire length of ridge open. Show me a video where ridge vent keeps an attic within even 20*F of ambient temp on a 90*F day. A fan can easily do that (and better).

[@boobacockaa]

What’s wrong with this used car salesman?