Temperature Controlled Exhaust Fan

[Indy300]

Guys
My new house that is being built has an attached 3-car garage. I would like to exhaust the air coming off of a hot car that is pulled into it (assuming the garage door gets closed after the car gets pulled in). I don't want to pay to run an air conditioner every time a car pulls in. I was thinking that when a hot car is in the garage, a thermostat controlled exhause fan on the ceiling would kick on and **** out the hot air. But that brings fire safetey into the picture if the garage ceiling drywall has a penetration in it. Maybe I could run a metal flue up through the garage attic to a roof top turbin vent. Just thinking out loud here.

Any suggestions?

 

[bmwpower]

Is the thermostat going to see that much of a temp delta when a car is pulled in? I just don't see the temperature changing that much, that quickly, especially if it's air conditioned.

 

[Roospike]

I guess i dont follow , is the garage A/C now when the car is pulled it ?
If so and you exhaust it you'll need in air inlet to match the exhaust and then A/C'ed garage will be sucked of all / most cool air and you would have to start over again with conditioned air anyway.

Air exhaust or A/C I think it would have to be one or the other and not both ( at the same time )

 

[Indy300]

Sorry if I wasn't clear. I don't want to install an AC in the garage. I was hoping to put in a temperature controlled exhaust fan.

 

[PAToyota]

Is a car really going to raise the temperature of the garage significantly? If you do want to go this route, a fan and thermostat from an attic fan system would likely be the easiest way to go.

 

[HoosierBuddy]

The car won't have a significant effect on the temperature of the garage.

That doesn't mean an exhaust fan is a bad idea though. It's not an ideal solution, but I bought a small double fan that mounts in a window. Basically, I open up one window 8" and put this unit in and then shut the window on it. Then, I open a window on the other side of the garage about the same amount. Then I turn the fan on.

I just leave it on all the time. It has kept the garage at least 10-degrees cooler on hot days. If it gets really bad, I can kick the a/c on in the garage...but the fan is sure a lot less expensive to run...even running it on "low" 24 X 7. The big down side is the security. I have to leave the windows unlocked.

A gable mounted fan might be just the ticket for you. I couldn't do that, because my upstairs is finished out into a family room. BTW....even though I have insulation between the garage and the upstairs....having the fan in the garage makes the A/C upstairs run a lot less. Besides staying cooler during the heat of the day....the garage now cools down very rapidly in the evening. Before I started using the fan, it would still be 90 in the garage at hours after sunset.

Some of that heat was making it upstairs into the family room, causing the a/c to run more than it had to.

Phil

 

[Indy300]

I say the following in jest:

You guys mean to tell me that if I drive home from work and pull into my insulated garage and close the door, the temperature inside the garage would not increase significantly in as little as a half hour? (I think you guys are drinking too much Kool-Ade ) In my old house, the heat coming off the engine made my garage very uncomfortable in this situation!

 

[bmwpower]

I say the following in jest:

You guys mean to tell me that if I drive home from work and pull into my insulated garage and close the door, the temperature inside the garage would not increase significantly in as little as a half hour? (I think you guys are drinking too much Kool-Ade ) In my old house, the heat coming off the engine made my garage very uncomfortable in this situation!

Unless you have the world's smallest 3 car garage, I don't see it being an issues....but that's me. An exhaust fan should work, but with the fans I've seen, you're going to have to set the thermostat just right for the fan to kick on...in otherwords, small temp delta.

Take the temp before and after a car pulls in. I'm curious what it is.

 

[kenfath]

"DO-IT" is my suggestion, you won't be sorry! When we reroofed the house we installed one thru the roof electric fan above the living area. I think the house stays cooler and the AC works less because of that fan. After finding out how well it worked I regretted not installing one in the garage. We have now installed one and I'm sure glad it is there. The partially insulated garage is much cooler than before. The fans are affordable, about $60/each. The roofers can easily install them when they are doing the roof. I'd see to it that the living area also has a power fan(s) as well as the garage. A project on 'my-things-to-do-someday' list is to install a switch that will allow the garage fan to be turned on independent of the thermostat. There are times when the air is cooler outside and I don't want to open the garage door.

 

[tonydanzah]

you have to put some real good exhaust fans on your garage everytime the exhaust fulls through.

spam?............