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Old 09-24-2011, 11:34 AM   #15
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Washed 20 years of dirt off the downspouts, then let them dry overnight. Began this morning by routing the pipes in a zig zag type of direction so the heat that comes into the box gets 2x+ warmer before it comes back out of the box.

Painted them up.

Next -
Killz the box, inside and out
Put high temp heat caulk inside the box
Cut holes in the pipes and caulk the outer edge of them so the air travel doesn't escape.
Cut the inlet and outlet holes
Buy the fan and solar panel for the fan
Run duct into the coach and find the sun to test!
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Old 09-24-2011, 03:48 PM   #16
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Awesome idea. Are you going to use a fan? Solar powered fan?

Nice clean workmanship.
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Old 09-24-2011, 04:13 PM   #17
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Can you amplify on your "zig-zag" comment? Not sure I understand.

Thanks.
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Old 09-24-2011, 05:22 PM   #18
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Quote:
Originally Posted by bluepill View Post
Can you amplify on your "zig-zag" comment? Not sure I understand.

Thanks.
I think I know what you mean, but I'm confused on how you did it...
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Old 09-24-2011, 07:11 PM   #19
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Quote:
Originally Posted by smack2020 View Post
Awesome idea. Are you going to use a fan? Solar powered fan?

Nice clean workmanship.
Thanks, yes... right now the fan will only turn on when the sun powers the solar unit. Still on the draft table though

Quote:
Originally Posted by bluepill View Post
Can you amplify on your "zig-zag" comment? Not sure I understand.

Thanks.
Sure, I wanted the inlet and exhaust to be located in the same vacinity on the box. Zig-zag / or convection. Many people just run straight through, but I want the air to travel through the pipes, switching back. You can see in this picture that I have the inlet (short vertical pipe) and outlet (long horizontal pipe) near each other, the outlet will go right next to the inlet. The air will travel through about 100' of pipe which is heating up in the box before it exits. Thus creating convection. I still have some things to work out but we are getting closer. Nice thing about this is that it could fit in a storage bay under the coach and will weigh about 60lbs when done. (estimate).

I will make these switch back, you can see where I have arrows to mark where I drill 1 or 2" holes in the sides and caulk them together to make the switch back sealed.

Quote:
Originally Posted by Midniteoyl View Post
I think I know what you mean, but I'm confused on how you did it...
Hang in there, we will get there together.
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Old 09-24-2011, 07:36 PM   #20
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Do you plan to paint the gutters black?
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Old 09-25-2011, 12:50 PM   #21
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He did already... see top of page.
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Old 09-26-2011, 09:13 PM   #22
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Got a few things done today, Killz'd the box and took a rotozip and made my intake and exhaust cuts. Almost ready for assembly!
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Old 09-26-2011, 09:29 PM   #23
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Are you keeping track of the $ spent and hours of labor? I'd be curious as to how much this project will cost vs propane saved. Assuming $4/ gal, gutters cost you 10 gallons, right?

And what's your hourly rate? But then how much would you pay/hr for this sort of entertainment?
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Old 09-27-2011, 02:00 PM   #24
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Well, box is caulked and all the downspouts cut.

Threw them together, caulking and painting along the way. Cleaned up the glass and threw it up top.

Right now the glass is just sitting there and its about 75 degrees out. Also my box is laying flat, not facing the sun and the box only had about 10 minutes in the sun to heat up since the last cloud.

With all that, we are at 131 degrees coming out of the box with a ton of air being forced through (vacuume).

Some pictures. I won't have a legit test for about a week or so till we hit DC or NC.
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Old 09-28-2011, 11:41 AM   #25
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Well the weatherman lied. He called for rain till Friday. Beautiful day, so I tilted the box into the sun waited for a few clouds to pass.

Outside the weather is 71 degrees.
The glass is 140 degrees.
The inside of the box is probably 200 degrees
I hooked up the vacuume and turned it on... after letting it run for a few minutes, took a measurement.
.
.
.
.
.
174 degrees at the exhaust port. I don't know if I'll be using a fan as strong as the vacuume, but seems like it will work.

Granted its hot, its summer etc, but 100+ degrees above outside temp. I've seen others measure their boxes in 20 degree weather and at the exhuast it blew 120 so about 100 degrees is what you will get, give or take.

You can see in these pictures how I made it convection.

I'll post more when I figure out where and how to mount it up.
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Old 09-28-2011, 12:25 PM   #26
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Oh, and forgot but this morning, started using the leftovers to create a space heater that will set inside my coach in a window. Hate to waste anything.
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Old 09-30-2011, 10:40 AM   #27
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Last update for a while.

Cost as promised - I still need a 20+ Watt solar panel and 2 fans to run the 2 boxes. Also need the ventalation pipe as well (likely a dryer pipe). Add about $50-$80 to the cost.

Made sense to use all the materials up instead of throw the little box away.


Solar project4x8 ply$20.27 Screws$3 Caulk$3.97 1/2" tuff R$12.45 Gutters$40 115$40 Corner brace$9.94 Gut gas$35 Glass gas$7 fire caulk$8 paint$7 Elect$1 plexi$10
TOTAL:

157.57
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Old 09-30-2011, 12:59 PM   #28
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Pre installed boxes

Here is a video and some talkage of the unit.

" type="application/x-shockwave-flash" wmode="transparent" width="425" height="350">
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