Timeline for Ridge Vents vs Gable Vents Energy Savings as a Percentage or $ Figure
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Aug 17, 2018 at 1:52 | comment | added | Tony Stewart EE75 | I was very disappointed with my ridge vents even with long open soffits with mesh but the ridge had a 2” coarse Matt to restrict rain flow but also restricts air flow. Even with 2 ft of blown fibreglass in the attic, the heat rise still demands the ACU to run nonstop in hot weather. From a thermal cooling efficiency point of view , roof collects a lot of heat (kW/m2) and higher air velocity flow is better not slow restricted convection. This needs good soffits with rafter ducts and lots of roof vents every 4ft or power assisted whirlybird. | |
| Sep 2, 2017 at 10:53 | comment | added | NPM | Actually, gable vents do have positive air flow, when use properly with soffit venting. The addition of ridge venting to gable venting negates the flow. What I'm saying is though, you are looking for performance, and it's not a performance thing. It's a right size, or wrong size thing. There is not a better vent, only a correct-size. Vents are not for super-cooling, only for .....well, venting. | |
| Sep 2, 2017 at 7:42 | comment | added | Ken | that is a calculator for how much venting is needed per sq. Gable vents do not have natural convection - which is what makes ridge vents work better and the reason for the sofit - hot air rises and it will rise out of the roof by natural convection pulling in cool air from the soffit. Gable vents are on the ends they do not naturally create a cross flow of air. What I am looking for is details - how much energy will I save one method versus another method - where are the performance calculators? | |
| Sep 1, 2017 at 21:30 | history | answered | NPM | CC BY-SA 3.0 |