I just bought a home that was built in 1970. One side of the attic has a gable vent with a fan that turns on automatically when the temp ge0ts high. There's no vent on the other side of the attic. There was a bad mold problem I had the seller rectify before my closing. Should I have another vent built into the other side of the attic for proper airflow?

>>2928970 (OP)
Yes

>>2928970 (OP)
Yes

Attics are supposed to be vented? Oh boy.

>>2928970 (OP)
Are there soffit vents?

Before all you cold weather enjoyers get your cunt hairs all in a twist, yes, vented attics are a thing. They are for warm-to-hot climates. And no, sealing them up and turning them into conditioned space is not a better solution.

>>2928970 (OP)
Attic exhaust fans are generally a waste of power at best and make your house hotter at worst. At least turn it off if not remove it entirely.

Yes, vent the attic. Talk to a pro about what your attic needs. Gable vents, especially on older homes, are generally not sufficient but you have to have the volume of your attic space and the local conditions taken into account to see how much venting you need. Get several opinions if you can. Sometimes one company has a solution that they recommend because that is what they know how to do. When all you have is a hammer, every problem is a nail. That doesn't mean its the best solution for your home.

>>2929285
QRD on attic exhaust fans?

>>2928970 (OP)
your roof will speed up wind like an airplane wing, and these whirl birds are powered by both outside wind but if no wind they can be powered by the hot rising air itself.

plus I just think they are cool.

Attach a couple (for balance) of solar powered lights, just for fun.

but assume WTF the sellers just got rid of enough to get you to buy will be coming back hard and fast.

figure the spores are EVERYWHERE.

>>2929439
Just a quick note, since some people get them confused: Attic vent fans are different from whole house fans.

Attic vent fans exhaust hot air out, creating negative pressure. This pulls cooler outside air into the attic from the other vents. Basically, increase attic air flow to lower the attic temperature. This helps reduce heat entering the conditioned space through leaks or radiating through the insulation and such. Simple, right?

The problem is many attics have poor ventilation to begin with. Creating negative pressure causes some air from the conditioned space to be pulled into the attic though cracks. This causes some outside air to get pulled into the conditioned space to replace it, defeature the purpose of the fan to begin with. Basically, they cause the same problem they are trying to solve, just in a different way, while also wasting electricity. Even worse, if your attic barrier is really leaky then can pull so much air from the conditioned space they can cause things like gas water heater vents to reverse flow and dump carbon monoxide into your home.

Why not just seal the barrier between the attic and the conditioned space super well and add more attic vents to solve that issue? Great idea! That will also negate the need for an attic vent fan in the first place. The whole idea of of an attic vent fan is to increase airflow in the attic to reduce the heat build up. Proper venting and sealing also does that.

The reason they are 'a thing' is because they are cheaper and easier to install then to actually fix the main issue. Same with the solar powered ones, which are even easier to install. They sound legit but don't work out when you run the numbers. Some half-assed handy man or dogshit 'ventilation specialist' can install them quickly and cheaply without having to radically change your venting situation. As long as you can cut a few holes, run some wire, and drive some screws you too can scam people with minimal effort.

Cut in a few roof vents Cletus