DIY INFRARED HEATER | No Electricity Needed For Greenhouse Heat
Heating an area for a short time can become expensive quickly. Small greenhouses can be kept at a comfortable temperature for your tender plants. This infrared heater is simple to build and many people have most of the components to build it already. Measured temperatures on this heater exceeded 500F or 273C and burned for over 6 hours. The heater is easy to set up and can be very inexpensive to operate. I'll show in detail how to assemble the heater and tips all along the way on how to operate safely. If your greenhouse doesn't have electricity this is the perfect heater for cold nights to keep your plants alive.
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Safety Note:Rubbing alcohol gives of noxious fumes. You'll want to use Denatured alcohol or camp fuel for interior applications! In case of emergency; R.A.can be used... ensure adequate ventilation! Also, from experience: place a coin/ stone etc over the fill hole to reduce flare up and fuel consumption.
Nifty! Some thoughts:
Check at a restaurant supply store for a larger pot. It might be less expensive than you think.
The first thing I tried when I heard about sand batteries was heating a pot full of it from underneath with, I think 8 candles. The temperature in my shed was about 6 centigrade, a couple of hours later I blew the candles out. After 15 minutes the sand was almost cold.
On my second build, I used a steel dog bowl as the lid and filled it with sand. The sand was almost molten in no time compared to the first build where I had the sand in the bottom. It becomes warm at the bottom but nothing compared to sand at the top for obvious reasons. Also bigger mantle, more infrared heat.
In place of the cast iron pot, could you look at semi-truck or trailer brake drums from a salvage yard? It would be a super heavy-duty alternative.
Suggestion: cooking oil or any oil works great and burns forever, also no fumes! You might need more space between the bottom inner & outer cans, oil does not throw off fumes nearly at the extreme rate of alcohol, the forever wick will need more room to draw.. ✌🏻🌎✌🏻
Large chimney brick and a larger kerosene lantern from Lehman supply company in kindred Ohio.
Very nice, unique setup. I like it! I would steer away from rubbing alcohol, especially at the ratio you are burning (looks like 70%??). It contains glycerin and water. What happens is the alcohol burns off and leaves you with a glycerin/water mixture in the can. Eventually, your wick will be saturated with water and burn very inefficiently. Best to use straight alcohols (methanol, ethanol, higher grade isopropyl). Methanol only has one carbon atom per molecule and will be much safer to burn, too. Less chance to create carbon monoxide and soot. Ethanol has two and isopropyl has three.
I would use one of those heavy gauge round galvanized steel water troughs used for livestock as a base for the sand battery. They come in many sizes from 23 gal and up. Might be a bit cheaper than cast iron. Thanks for this vid, it gave me some ideas for heating. 👍
Robert Murray Smith on his T-N-T (thinking and tinkering) channel has done amazing work with these heaters and sand batteries.
Great idea. The only problem I see is safety. The whole tower is resting in sand with nothing fastened to anything. I would recommend attaching a spoke style rebar base as well as fastening the internal components together. Greenhouses can get a lot of traffic, and to me, currently, this looks unsafe.
You can do the same thing but with olive oil. It’ll last longer and the oil itself isn’t flammable. Just use some rubbing alcohol to start the flame on the carbon felt
really cool. i dont know how much room you have in your hot house but you could get some of those blue plastic storage 55 gal drums paint them black and fill them 3/4 the way with water the thermal mass of the heat collected in the day would radiate though the night. i still really like your design.
If you can retrofit that to use propane, you'll also boost the Co2 content in the greenhouse. Your plants will love you for it!
This sounds a lot like the one that Robert Murray-Smith made a few months back. But explained a little different.
Great setup-but wouldn’t it be much easier to add all the sand BEFORE inserting the pipe. btw Beautiful Bonsai trees👍
Since you’re using the carbon felt you could use olive oil for an endless candle. You’ll still need a starter fluid like your alcohol or a paraffin lamp oil just to start the wick.
Thanks for the video love the info, instead of using (an awesome cooking pot) Dutch oven you could get a small propane tank (scrap yard is a good place) cut out most of the center and there you go👍
Thank you for your project and taking the time to explain everything