Originally Posted by jeffpas
I've been reading posts all over the web and everyone loves to beat up on attic fans....it is a favorite venting topic. But despite all the bad press they keep getting bought, keep getting installed and refuse to die out.
So either the public is collectively nuts (possible).... or theres some truth to the madness (also possible). Mine certainly cools off my attic. I also like opening the windows in the house on a cool evening after a hot day and running the fan, beats the air condition by a long shot and probably healthier too. I think its more effective than say, a ceiling fan which just moves the same hot air around the house.
I just watched this Youtube clip where a contractor talked about many of the old homes that originally came with the fans, and his take was, leave them in. Ridge vents are good if youre starting from scratch, but why throw out an option you already have?
Anyway I can't see paying the roofer to take out a fan I just spent a chunk of change on, and charging me for it to boot. Its really nice to have. And currently, the attic just doesn't get raging hot anymore.
And as far as leaving it in.....I just don't know if paying to have ridge vents put in at this point would be counterproductive, make the effective fan ineffective......turning it truly into a boob purchase and costing more besides. Sounds like it might.
Maybe going for more soffits is the answer? Or gable vents if more ventiliation is really needed? Seems to make sense to go with what you've already got instead of ripping out, patching, working backwards.
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Partical board subflooring, louan underlaymant, plastic dryer vent house are also still sold, does not make it a good idea.
A ridge vent, vents the whole roof, no air gets traped in the rafter bays, cost 0 to run.
Having a gable vent, turbin vent or powered roof vent and a ridge vent makes 0 since. The hot moist air needs to be drawn out and exhosted. Have both stye vent will short circut the flow. Instead of drawing make up air through the soffit drawing through the rafter bays and out the roof it just gets it's air from the nearest vent. So none of the moist air gets exhosted.
The fan your talking about you say you saw on You Tube where whole house fans, there mounted to the ceiling not the roof. Yes there great but without proper venting in the attic the air being drawn in has no place to go.