Well, I've been stuck in the middle constructing my greenhouse with all the rain here in Northern Cali.
So, I've been researching heater ideas, air conditioner ideas etc. etc
I've came across this Candle Heater and watching 10 or 15 videos with different ideas how to make them.
Then, I came across of what they're trying to copy.

It's called a Kandle Heater. Yes with a "K". Has anyone ever heard of these or have any experience with these and would it work if maybe 2 or 3 were put into a greenhouse that was insulated with bubble wrap, solar blanket, etc etc.

https://www.youtube.com/watch?...

Never heard of one of these, Lucky. I would worry about the fumes affecting my plants. But that might not be an issue. What's wrong with a good ole fashioned electric heater or two? Start looking at fans too. What's your flooring going to be? I like to look ahead.

My flooring will be pavers and gravel. I already have a few fans but greenhouse fans that need to be mounted are expensive. $100+
The heaters will be fine and still be used but candles burn on cent's compare to dollars with electric heaters.
The only think I worry about is the carbon monoxide from the candles, though I'm not sure if candles can put out enough to harm me

El Chempo me uses anything but expensive fans. I have a 22" box fan at each end (floor-level) and two oscillating fans at each end, 6' off the ground. One box fan in each greenhouse runs 24/7 and the others are on timers to come on around 9AM and off around 5:00 PM. My 220V heaters are expensive though, at least compared to the fans. Cold damage is my greatest fear.

I would not think there is hear enough carbon monoxide to harm you. I was more concerned about the plants welfare.

So you don't have any fans mounted at the top of your greenhouse to cool off your green house during the summer months?
Are your box fans set next to a vent to bring in air from outside?

Keep in mind, Lucky, that other than starting seeds and rooting plumeria, my greenhouses are basically emptied in March/April Everything goes outside. In the summer, even with vents and doors open, 70-80% shade cloth in place, and all fans running full speed, my greenhouses get 110-120F. Without AC or a swamp-cooler, there is absolutely nothing I can do about this. These high temperatures are anything but "kind" to tropical plants. My fans simply move air.

How big is your greenhouse? I use the force fan milkhouse electric heaters with a portable thermostat and have a box fan up high to circulate the air and heat. My GH is 8 x 16 and one heater does the job though I'll put two in there when the temps will get into the 20's outside for more than 2 or 3 hours. They system adds generally about 50 dollars to my electric bill every month. The picture shows 2 heaters, one high and one low.

Here is a link to the portable thermostats I use.

http://www.kkontrols.com/

I too use remote thermostats, but because I am using 220V heaters, the thermostats are hard-wired to the heaters. These thermostats are the only way to be certain the heaters are coming on and off at a specific temperature. The built-in thermostats that electric heaters use are pretty worthless in my opinion.

I have a 10 X 12 ft greenhouse. Not sure how high it is though.
@Xeramtheum I love your greenhouse setup. It looks awesome

@Xeramtheum @drdawg Is it difficult to hard wire the thermostats to the heaters? And, where do you and how high to you place your thermostats?

Thanks for you help

@Xeramtheum which thermostats do you have on the website you provided?

You are not asking me, Lucky, but I used Sure STAT Weatherproof Thermostats. My first pair were plug-in types, used with 110V heaters. These were the Model T1120P. When I switched to 220V heaters, the thermostats had to be hard-wired (I had an electrician do this), and these two were the Model T110. I purchased my thermostats from Northern Tool & Equipment.

I always position my thermostats 1' off the ground and about 8' from the heaters. This allows the thermostats to be minimally influenced by the (direct) heat produced when the heater is on. You want the thermostat to be positioned in an area that you believe would be the coolest in the greenhouse. At least that was my thought process when installing them.

LOL, yes I was asking you about how you hard wired your thermostats

What type of heaters did you use? Actually what did they look like and do you remember what brand? Did they have a fan that pushed out the heat?

Keep in mind, Lucky, these two heaters are 240V and not simple, plug-in, 120V ones. They are hard-wired. I had to have everything wired from the two greenhouses back into the house electrical panel, and two new 220V breakers put in. This was not a "cheap" endeavor. I felt it was necessary to insure I have (more than) adequate heat in those greenhouses. Those two heaters came from Northern Tool & Equipment and they are Model PH-960, ProFusion heaters.

Yes, Lucky, they have powerful fans and 4 louvers to direct the heat.

Nice, well I'm on the hunt for a swamp cooler to install and will have to look at heaters in the summer when they are discounted.

Mine aren't hardwired. I use the portable prewired one which has a piggyback plug on it that you plug the heater into. I place one thermostat directly on the ground and if I use two heaters and thermostats I'll place the heater up high and keep the 2nd thermostat on the ground as well.



Here's a link to a thread that shows how I load up the GH.

The thread "A loaded Greenhouse." in Greenhouses forum

That's a 120V thermostat, Anne. I still have a 120V heater plugged into one of those thermostats in each greenhouse. They are simply back-up heaters, in case my 240V heater(s) might fail for some reason. So far these 120V heaters have not been needed since the 240V ones have been installed. 240V would have to be hard-wired, since the heaters themselves have to be hardwired directly into the house's electrical panel, each with their own breaker.

I'm still wanting to get a propane heater in there - I have a generator that can handle two heaters .. just in case .. but would prefer not to have to rely on it for a power failure because of an ice storm or the like. I have a good friend who is a master electrician and she's the one that wired the greenhouse for me with two outlets with their own breakers ... nice to know I can run two 'space heaters' full blast without blowing a fuse.