Jeff Brown: How do you turn it off in hot months? Wut if you was to run a copper line from your hot water heater to pre-heat the tank; for year round use??? How can I circulate the water only when the heat is available? Is there a way to circulate the water flow inside the pressurized hot water tank???
Barry Jordan: Question. Would it not be better to push the air into the collector as opposed to pulling the air out? The logic ofcourse, is to not be pulling hot air across your fan motor. Perhaps it's not hot enough to matter on the motor, just figured it would run cooler. And, on the inside of the collector, would it not benefit to line the bottom and back with a reflective material to maximize the sun's energy? The other guy looked like he did line it with reflective material. Also, where do you find those fans?
Tess Daniels: Thanks for the well put together presentation...so inspiring!!!!
roland reves: Nice! i also do some SHW! im on Face Book as Guiltfree Hotwater
ShotDownInFlames2: Brilliant. Thanks.
bushtuckerbrad: PS living in the far north of Scotland
bushtuckerbrad: Hi there I have just built a hot air collector but trying to think how big a fan I will need Its the workshop roof +- 5m3 can you help
Johnsfavids: Thank You for posting this informative video.
Jeff Demers (JD): Very well put together video by an enthusiast. I'm already set on building one, and can't wait to get started!
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 :)
Sandra: BTUH = 1.10 x CFM x Delta T = 3500 btuh / 3.41214 = 1000 watt or a 2/3 of an air dryer output.
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.
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?
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.
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.
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?
Aluminum Downspout Hot Air Solar Collector Construction5
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