Using attic heat for the house - Page 4

Daox · 09-23-10, 10:44 AM

Quote:

Originally Posted by Patrick

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

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

Will mix up the air in the kitchen nice and good.

Xringer · 09-23-10, 01:52 PM

Quote:

Originally Posted by Daox

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..

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!

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..

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.

09-23-10, 11:15 AM	#32
Daox Administrator Join Date: Aug 2008 Location: Germantown, WI Posts: 5,525 Thanks: 1,162 Thanked 374 Times in 305 Posts	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? __________________ Current project - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. & To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

09-23-10, 01:24 PM	#34
Daox Administrator Join Date: Aug 2008 Location: Germantown, WI Posts: 5,525 Thanks: 1,162 Thanked 374 Times in 305 Posts	Woooo lol Will mix up the air in the kitchen nice and good. __________________ Current project - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. & To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

10-02-10, 12:06 PM	#36
Daox Administrator Join Date: Aug 2008 Location: Germantown, WI Posts: 5,525 Thanks: 1,162 Thanked 374 Times in 305 Posts	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. __________________ Current project - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. & To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

10-03-10, 09:40 AM	#38
Daox Administrator Join Date: Aug 2008 Location: Germantown, WI Posts: 5,525 Thanks: 1,162 Thanked 374 Times in 305 Posts	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 __________________ Current project - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. & To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

10-05-10, 08:18 AM	#40
Daox Administrator Join Date: Aug 2008 Location: Germantown, WI Posts: 5,525 Thanks: 1,162 Thanked 374 Times in 305 Posts	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. __________________ Current project - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. & To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

10-02-10, 02:52 PM	#37
Patrick Apprentice EcoRenovator Join Date: Jul 2010 Location: East Coast of Florida, USA Posts: 149 Thanks: 2 Thanked 5 Times in 5 Posts	Cool! I mean Warm! 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.

10-03-10, 10:22 AM	#39
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 115 Thanked 250 Times in 230 Posts	Farm Innovators Thermo Cube Thermostatically Controlled Outlet has a model that comes on at 120F and goes off at 100F.. 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.

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