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*
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
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
Jason Hurtado Daniels: *Aluminum Downspout Hot Air Solar Collector Construction*
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.
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
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
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
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
william warren: Where do you get the fans & snap switches & Temp probes for the water
storage tank on your other vedio?
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
SOLARCELLS101: I just Subscribed to you channels , some great info
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
jakhammers world: i saw this first on Build it Solar. Nice video to go with the write up from
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'.