Aluminum Downspout Hot Air Solar Collector Construction




What do you think about this video?

Jeff Demers: Very well put together video by an enthusiast. I'm already set on building one, and can't wait to get started!

Darin Clune: I am building a *Giant* array with 12-14 downspouts spanning 20-25 feet. Would it be better the snake on each and or flow air through 6 or 7 of them one way and bend the one corner into the other 6 or 7 (Like what is shown in the video). Im wondering if it would be more efficient if it would go through them each individually, all snaked up rather then through them in one quick loop? 

Jason Hurtado Daniels: *Aluminum Downspout Hot Air Solar Collector Construction* #energy 

Jason Corvallis: *Aluminum Downspout Hot Air Solar Collector*

John Godwin: Hi Scott. This has me thinking about building one of these. Do you have a Facebook page dedicated to this type info?

Captain Zeb: You could extend your evening run time by make a few changes. Ever walk on a beach late at night, feeling the warmth of the sand? Extend all dimensions by a minimum of four inches. Pack all sides between the insulation and heat collector plate with play sand. The heat in the sand will give you a few more hours of run time after the sun starts going down.

Reggy Hidajat: Hi Scott, i have a question. Does this thing need to face the sun to get the heat from the sunlight? what if i make this solar collector in an apartment that does not face the sun? Will it work? thnkyu :)

Janelle Barbour: Hi Scott! Have a question for you. Have you ever giving the idea of using magnifying sheets to cover it with? You could generate 3x or more heat using the sheets and will also better generate heat on cloudier days and would be able to magnify light being reflected off the snow in those areas with high snow fall. Would also cut down on size of the unit if someone has a problem with space. You would also need to look more toward a metal frame and strong reflective backing to keep from starting a fire in the box. What do you think?

butch gardner: Scott, Help. I can not find the DOW Super Tuff-R 4x8 Styrofoam 1" boards at any of the local name brand stores. I did find 1" ISO styrofoam boards at a local roofing supply company BUT it had a paper coating on BOTH sides of the board and the manufacturer of the board said that the paper coating was rated up to 250 degrees F. (What is the highest temperature you've observed inside any solar hot air collector?) I've built my 4'x8' hot air collector box and I have the downspouts cut and ready to install but following your guidelines I'm not sure about the insulation or how you secured the insulation to the box. Thank you for your time and any assistance you can provide. Butch Richmond, Va. 

Paul Ladendorf: Hi Scott. Great design and video. My concern with this system is with pressured treated wood and painted downspouts in a unit that is getting up to 150 degrees, I wonder about off gassing of chemicals and air quality. Have you considered that?

Mark W: Wouldn't your system be more efficient if you got rid of the weeds, bushes, and plants, blocking the sun!?

Sandra: BTUH = 1.10 x CFM x Delta T = 3500 btuh / 3.41214 = 1000 watt or a 2/3 of an air dryer output.

G. Scott Davis: Hi Simon, for some reason I know longer have a reply link. Anyway, for night time heating with solar you'll need some thermal storage. Please see my thermal storage video for more details.

West Virginia Patriot: New subscriber Great Video Scott!

Ralph Marlow: After looking at lowes the price for aluminum downspout in my area is $50 for a ten foot section. Wish I had invested in a bunch of that stuff when the price was 5 times less.

john doe: I noticed that your inlet heat is 58 degrees from 9am to 3pm...that tells me your heater aint working! If your heater was working wouldn't the inlet heat rise?

Jason Hurtado Daniels: *Aluminum Downspout Hot Air Solar Collector Construction* #energy

WSPSkydiver: Job well done! It's seems to be a very nice design. Assuming you're still using this (almost 4 years based on posted video date), have you noticed a cost savings in heating your home? I'd like to start a project like this, but I'd like some information on long term usage from you serious DIY builders. Thanks!

kricotas: very nice!!!

felibr adone: Nice project, but do NOT use plastic with heat. Very canceriginous.

manwithgills: I wonder if you could get more heat retention if you rolled up the aluminum screen and placed it inside the downspout (like baffles inside a muffler).

Saeid Momtahan: Hi Scott. Thanks for the great videos. WHen you provide a link on your video, you can click the box' open in new window'. That way your viewers won't be diverted from the video they are watching and can finish it b4 watching your other video. Saeid

Eddy Rivera: Is there any safety reasons to not build a solar collector directly into the framing of your house. (Assuming you're either building from scratch or fixing up a home.) Thanks in advance Scott!

JazzTree78: Awesome. Both Projects. Scott really did a good job of insulating the frames and even the pipes in the ground. Also, the flashing on the inside. His fans look like they may be 12 volt and thus solar powered, which would be the ultimate free heat. The damper is crucial too. Once the sun is gone, these turn into heat extractors instead of heat producers. I like how you've got it heating the basement, which heats the floor and the heat just migrates gently upwards.

Kent Hall: AWESOME information! 

jerry casey: will this still work with out fans

Richard Sims: Getting ready to build my first solar collector. Getting excited to start experimenting and glad for all your input. I am considering combining water and air collecting within same panel. I am sure someone has tried it already. Any input for combining the two ? good or bad? Also planning on pouring concrete panels to connect hot water pipes for thermal mass storage. Big enough to be of thermal value and still be moveable.

J Battler: I went to your website and get ads from an oil company pushing the most environmentally disastrous projects we've seen in decades. Northern Gateway makes a joke of your statement about "looking after the environment". That finished me on your credibility/integrity. Nice solar idea though.

Tim Miller: yippee so easy for heat

Andy Fetisov: It would move more air if you have it blow into the intake.

Thom Westergren: Have you collected any data on actual amount of savings you've achieved?

mel porter: That's a brilliant way of collecting virtually free heating for your house, except if you live where i do, cold and almost always cloudy and rainy England! :)

william warren: Where do you get the fans & snap switches & Temp probes for the water storage tank on your other vedio? WW

Ronnie Pace: I cannot tell you how much I truly enjoyed your ingenuity and sharing of this knowledge. Thank you SO much! I have one question. How would I figure out the angle I would need for my panels if i live in New Mexico at 5000'? 

SOLARCELLS101: I just Subscribed to you channels , some great info Thanks again David and God Bless

Ngaire Genge: Hi! Thanks much for the great videos, really enjoying them! I have just a couple practical sort of questions. First, does it snow where you are? I live in southeast Canada, we get snow. A unit resting atop my window wells would disappear with the first snow! :) I assume it would be equally efficient mounted higher? Second, our residential code wouldn't allow us to block basement windows. They're considered important fire escape points. Any alternate suggestions? Thanks again!

G. Scott Davis: @Yourbadnightmare Hi Rick, From what I have read, air behaves more cooperatively pulled than pushed. If I remember right, the fan is rated at something like 130F, so while I'm at the upper end of its range at times, I'm not usually exceeding it. Thanks for your interest and kind words! Scott

SailaSobriquet: Great video, Scott! Thanks!

G. Scott Davis: Hi Grezegorz. There are folks on the SimplySolar group experimenting with hybrid panels, attaching CPVC or copper pipe to the downspouts to heat fluid as well. You can use the fluid to heat your thermal storage tank and circulate your town water though it before it reaches your regular hot water heater. Please see my thermal storage tank video for details.

david wilson: Thanks Scott for all the great ideas. Is that a radon fan. Thanks again for all your vid's. David

G. Scott Davis: @hootiemcgrudy2 Hi, that is a Snap Switch. They are only about $6.00, which I got separately. Youtube won't let me post links here, but if you join SimplySolar I'll tell you where to find them. The fan is powered by conventional house current. Fans draw very little power. To size your fan, you want about 3 CFM of air per square foot of collector.

G. Scott Davis: @justinmy300z Hi, I didn't see this idea anywhere before my son Brad and I came up with it a few years ago and built ours. I certainly would have given credit otherwise, as I credited Gary with the pex collector design that I built and as I credited Mike for the coroplast collector I'm considering. In this case, great minds think alike! Congratulations on a great idea!

jakhammers world: i saw this first on Build it Solar. Nice video to go with the write up from BIS!

G. Scott Davis: Sounds like a great project Norm. Please join our Simply Solar forum, share some pictures and tell us what develops in the Member Projects section!

G. Scott Davis: Hi Grandpa Bill. Youtube won't let me post links, but I can share if you join us on Simply solar. If you go to Pex Supply, you will find them there. They are only $6.00.

orignalbuckaroo: Hi Scott, TNX so much for this well done video !!! I wonder if this system would be good enough for a 24X 32 garage ??? TNX again Scott

huey216: Hi Scott. Great videos thanks. I am in PA and just completed a collector that is mid way in size between yours and Scott Smith's being 24x2 with four aluminium spouts using Scott Smith's plenum design. I wish I had the entry / exits at the back panel as the collector adjusts 26 - 60 deg. What have you found to be the best air gap between spouts and glazing? I have used flex-o-pane for cost, which is really clear but either sucks in or out, depending on + or - fan. Spouts aren't airtight I think.

G. Scott Davis: @josephdupont I don't recall the specs. Maybe 80 watts?

oxenpaul: Well explained! (now we have to figure out how people not named Scott can build them :^) At first I was worried that you were pumping basement air into the living space and worried about radon gas. But just warming the basement and then letting the heat radiate up is a lovely, thrifty and safe move. Are there condensation issues? Also I'd be tempted to rotate the downspout materials 45 degrees (long axis) to present a corner to the sun (and any reflections into a neighboring downspout wall...

blipco5: Scott, nice job on the low profile collector but if you're worried about street appearance you might want to trim those weeds. Just sayin'.

Rating:
Aluminum Downspout Hot Air Solar Collector Construction 4.9 out of 5

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