Hanging heaters

I foudn this old book on building your own gh and was looking through it for any ideas that might help to work with heating my houses.

One of th epages showed this picture of a small , like you would buy to heat a room in a house, heater and it was suspened from both sides from a small chain.

The idea would work great becuase my houses are 20 x 20 and there not enough room to put any kind of heater on the ground. Am wondering though about how far up they would have to be off the plants and how far down from the plastic, so it wouldn't melt or burn.

Also, do ya think a couple of them small home use ones would work. I was thinking about maybe them ones that come on and blow and then when they reach a certain temp on the dial like med, or high , then they shut off automatically til the temp reaches a certain degree and then they come back on again.

There just no way of going with prograne or any type of gas, way way to high, so saw this and wondered if it woudl work, and be more economical? Think KWH are running about 14 cent an hour here.

Charley's Greenhouse has some heaters on their website that are designed to be mounted up higher in the greenhouse. I'd definitely recommend getting something that's designed for outdoor use vs an indoor heater, you run less risk of electrocuting yourself if it gets wet. The other trick is that most plants don't like a stream of hot air blowing right on them, so you'd have to be careful that it wasn't blowing directly on something.

I don't understand why you'd want the heater mounted high. Seems quite inefficient, to me.

Ecrane.. Thanks.. I take a look at their site and see what they have.

Eggs.. I have to go up. There is only likea foot pathway from the front to the back of the house. If, I tried to put one near the front door where there is a bit more space then the heat would be blowing right on everything and figured the plants would get heat burn.

The sides are only 6 foot high and the top center beam is at 7 foot. The pallets are all about two feet of the ground.

My point was that heat rises. You'd lose much more heat than you'd gain, by placing them high.

At 20x20x7, you obviously don't have a hoop house. Can you give more details on it's/they're construction? Are the walls poly? Glass? How thick?

Believe me, I understand about space constraints. My GH is 8x12x7. I also have only a center isle. I'm also in a MUCH colder zone than you. I use two, small space-heaters, placed on the floor. One is inside the GH doors, facing in, and one halfway, facing the same direction. With this setup, I can maintain 60 degrees except on the coldest of nights (below zero), when I may go to 55 degrees.

I guess I'm trying to figure how in a 20x20 GH, you can't have floor space available. Is this a commercial operation?

What temps are you wanting to keep, in the winter, in Alabama?