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-   -   Using attic heat for the house (https://ecorenovator.org/forum/showthread.php?t=1125)

Daox 09-23-10 10:44 AM

Quote:

Originally Posted by Patrick (Post 8282)
Here's a cheap one if you don't want to invest a lot of money for a test: https://www.surpluscenter.com/item.a...tname=electric

Wow thats absurdly cheap. I couldn't even find used car/furnace ones that cheap on ebay or craigslist.

Daox 09-23-10 11:15 AM

I guess this brings up the question of how much flow should I try to shove through a 6" duct.

According to this site: Equivalent HVAC Duct Sizes By CFM, it looks like my 6" duct can flow 300 cfm.

I think my father in law has an old furnace blower laying around. I think I'll just ask him if he wants it anymore.

Anyone know of a way to slow down a 110V AC motor easily?

Patrick 09-23-10 01:18 PM

Quote:

Originally Posted by Daox (Post 8286)
I guess this brings up the question of how much flow should I try to shove through a 6" duct.

According to this site: Equivalent HVAC Duct Sizes By CFM, it looks like my 6" duct can flow 300 cfm.

I think my father in law has an old furnace blower laying around. I think I'll just ask him if he wants it anymore.

Anyone know of a way to slow down a 110V AC motor easily?

If you push 300 cfm through a 6" duct you'll have a 17 mph breeze coming out of it (appx).

Daox 09-23-10 01:24 PM

Woooo lol :D Will mix up the air in the kitchen nice and good.

Xringer 09-23-10 01:52 PM

Quote:

Originally Posted by Daox (Post 8286)
I guess this brings up the question of how much flow should I try to shove through a 6" duct.

According to this site: Equivalent HVAC Duct Sizes By CFM, it looks like my 6" duct can flow 300 cfm.

I think my father in law has an old furnace blower laying around. I think I'll just ask him if he wants it anymore.

Anyone know of a way to slow down a 110V AC motor easily?


Try using a simple light dimmer. Most of them can do 600 watts..
http://www.homedepot.ca/wcsstore/Hom...5b8b3469_4.jpg

Daox 10-02-10 12:06 PM

I'm currently at my in-laws house. My father in law is a master electrician and I knew he'd have something laying around. He just handed me two bathroom vent fans. These should do the job nicely. I'll get pics when I get home. They're about 6" in diameter and the one I'm lookin at now pulls .9A.

Patrick 10-02-10 02:52 PM

Cool! I mean Warm! :D You could rig it up with a thermostat (maybe from an attic fan) in the attic and another thermostat (for a heatpump or a furnace) in series in the kitchen so that the fan only comes on when the attic is hot and the kitchen is cool.

Daox 10-03-10 09:40 AM

Yeah, thats what I was thinking. I'll have to dig through the differential temperature controller thread we had a while back. I was looking into making one. Perhaps now is the time, or maybe its time for me to buy a cheap kit and make one for a few bucks.

http://ecorenovator.org/forum/projec...ontroller.html

Xringer 10-03-10 10:22 AM

Farm Innovators Thermo Cube Thermostatically Controlled Outlet
has a model that comes on at 120F and goes off at 100F..

http://ecx.images-amazon.com/images/I/31KgRSZXw5L.jpg

I've been thinking of getting one of these for my attic fan.
It's old and it's sensor bit the dust many moons ago.

Daox 10-05-10 08:18 AM

For now I might just keep it on manual control. Still working through the details. I'm definitely going to need some flapper door to stop cold air from shooting down the chimney.


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