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How do you heat your greenhouse?

Emory, TX(Zone 8a)

I am looking for ideas on how to heat and humidify a greenhouse. Any suggestions would be greatly appreciated.


Walpole, NH(Zone 5a)

Noticed you haven't had any replies, maybe you should post your question on the greenhouse forum. I built a greenhouse which I finally got enclosed early this spring. It is attached to my basement (South end is ground level) I used two small fans (one to blow warm air into greenhouse and the other to draw air back into basement at the other end)

Charlotte, NC(Zone 7b)

I have a torpedo kerosene heater with an inline thermostat. Here is a view of my greenhouse.


Thumbnail by greenthumb_NC
Paris, TX

I use a propane heater. My greenhouse is 10x20.

Thumbnail by raggins
Lewisville, MN(Zone 4a)

Not being a fan of being blown to pieces, I use fuel oil. Each greenhouse has a 200,000 BTU furnace with a huge fan. Heats them easily.

Glennie, MI(Zone 5a)

Our outside wood furnace heats ours ... Hot water heat... It is on its own thermostat.. I keep it at 70... Aleta

(Nadine) Devers, TX(Zone 9b)

Depending on where ya live in Texas..Since I live near Houston and I don't get many frost nites, I use Xmas lights near the floor of my hothouse..turned on by timer from dusk to what zone are you??

Emory, TX(Zone 8a)

I am in Northeast Texas, colder than you I am sure. I can't decide what zone I am in but it is either 7 or 8

(Nadine) Devers, TX(Zone 9b)

What kind of greenhouse do you have??..I have a 3 plastic layer hoop style hothouse during the winter...

Emory, TX(Zone 8a)

It is a 10' x 10' made out of pvc and covered with plastic material. I do not know how many layers the plastic is. How can I find out? My husband made it from stuff he bought at Home Depot. I read somewhere that you can't heat a greenhouse made of plastic. I guess they were saying that the heat would just leak out. I am hoping that is wrong because DH worked SOOOO hard on it.

Gilroy (Sunset Z14), CA(Zone 9a)

We have a lean-to greenhouse on the side of the house. After seeing the temp ranges the first year, we took the outlet from the furnace (where it vents to the outside), and piped it into the greenhouse with a 3" black PVC pipe. When the furnace kicks on, it puts warm, moist air into the greenhouse, and it's FREE because that air would just be going outside. I've thought about pushing the clothes-dryer air, too, but it's on the other side of the house and would be a hassle.

Anyway, this works great---when it gets cold outside, it stays about 10 degrees warmer in the greenhouse, which is all I need for seed-starting and frost protection.

Comer, GA(Zone 7b)

pigeon,please tell me you're kidding about the furnace vent!!!! If you work in there for any length of time be aware of the warning signs of carbon monoxide poisoning,headaches,sleepiness,nausea. There's a reason the furnace was vented to the outside.

Lewisville, MN(Zone 4a)

pigeon, did you kill your plants yet ? Dumb!

Emory, TX(Zone 8a)

Is pigeon still alive?

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