09-18-10, 12:07 PM | #11 |
Administrator
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,525
Thanks: 1,162
Thanked 374 Times in 305 Posts
|
I only had about another 45 minutes before I had to leave last night. So, in just under 2 hours of blowing the attic air down, it brought the temp up from 68.5 to around 71.5. Not too shabby if I do say so. Well worth looking into IF the temperature gets high enough in winter.
__________________
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. |
09-21-10, 09:22 AM | #12 |
Administrator
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,525
Thanks: 1,162
Thanked 374 Times in 305 Posts
|
I did this again last night. I wasn't very sunny yesterday, but the attic was still 72 and the upstairs was 66. So, I wanted to see what a 6 degree difference would do to me. ~2 hrs later the upstairs was 67.5 and attic was ~70. With so little temperature differential I didn't think there was much benefit, but I was happy to see the temp go up 1.5 degrees.
So, going forward I'm thinking of improving the setup. I think the next easy step would be to move the fan into the attic and set it on top of the cutoff chimney. I recently bought a remote outlet control for another project, but I'm thinking it would be perfect here for manual control. When I notice its warm up there, I flick it on and have warm air blowing down into my kitchen. Of course I'll need to unblock the previously blocked hole. Ideas, thoughts?
__________________
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. Last edited by Daox; 09-21-10 at 09:49 AM.. |
09-21-10, 10:08 AM | #13 |
Lex Parsimoniae
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,918
Thanks: 114
Thanked 250 Times in 230 Posts
|
Is there an all-season attic-vent-fan product on the market with bi-directional fans,
that's insulated, with a flap that shuts during winter nights.?. It would be nice to clear out indoor hot air in the summer and suck down warm air on days like this.. |
09-21-10, 10:14 AM | #14 | ||
Administrator
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,525
Thanks: 1,162
Thanked 374 Times in 305 Posts
|
Sorry, I haven't responded to a bunch of posts here.
Quote:
Quote:
There is insulation above the door when its all closed up.
__________________
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. Last edited by Daox; 09-21-10 at 10:19 AM.. |
||
09-21-10, 10:16 AM | #15 | |
Administrator
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,525
Thanks: 1,162
Thanked 374 Times in 305 Posts
|
Quote:
Anyone have any ideas on what products could be used like this? I'd imagine a bi-directional flapper door wouldn't be the easiest thing to come by.
__________________
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. |
|
09-21-10, 10:58 AM | #16 |
Lex Parsimoniae
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,918
Thanks: 114
Thanked 250 Times in 230 Posts
|
It's 70 outdoors, 72 in my PC room right now (good solar), 66 in the basement and about 89 in the attic.
I have the pull-down door open about 8", so it doesn't get real hot up there.. Mainly, I want fresh dry air circulating in the basement. (for now). When that pull-down door is sealed in the winter, it gets pretty warm up there.. Sun hitting any part of the roof will help keep the snow melting.. From the peak down. I think my summer setup is okay, but I'll have to see if I can use some of that attic heat for winter space heating. |
09-21-10, 02:51 PM | #17 |
Helper EcoRenovator
Join Date: Sep 2010
Posts: 66
Thanks: 3
Thanked 6 Times in 4 Posts
|
Use an arduino or other microprocessor: When the attic is greater than 72 degrees and the house is less than 70 degrees, turn the fan on.
|
09-21-10, 05:01 PM | #18 |
Administrator
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,525
Thanks: 1,162
Thanked 374 Times in 305 Posts
|
Yeah, thats probably the way I'll go eventually if all the manual testing works out.
__________________
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, 07:23 AM | #19 |
Administrator
Join Date: Aug 2008
Location: Germantown, WI
Posts: 5,525
Thanks: 1,162
Thanked 374 Times in 305 Posts
|
So, I checked my chimney the other day. The opening is actually about half the size of my box fan. So, I'm thinking it would be a good idea to find some other fan for it. So, I'd imagine a squirrel cage fan would probably work better for this application since they're normally used for hvac stuff. I'm guessing because of their ability to create a higher pressure differential? Does anyone have any suggestions?
__________________
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, 08:36 AM | #20 |
Apprentice EcoRenovator
Join Date: Jul 2010
Location: East Coast of Florida, USA
Posts: 149
Thanks: 2
Thanked 5 Times in 5 Posts
|
If you're going to use a squirrel cage fan, you can run it down the chimney since the discharge area is typically a lot smaller than a box fan. And it does produce a higher pressure differential than an axial fan.
|
Tags |
attic, heat, reclamation |
Thread Tools | |
Display Modes | |
|
|