Hey Topher, I seen pics on another post, it looks cool! Like the blue. Look on the greenhouse forum here on GW for more ideas but I'll give you my thoughts here. You may be able to heat it fairly cheap with one of those oil-filled electic heaters. Mine is 10x40, so I use propane heat and you may look at one with a thermostat in the pro-con brand. Also it looks like you have some free space in there. The more mass you have the more heat it'll hold. Consider adding some barrels filled with water. They make good tables when you put a couple with a top across them. They really help level temps out at night when it cools off. Other than that a fan circulating air is a must if you don't already have one. Watch day time temps cause they can get pretty hot on a sunny day as you probably know already. Good job on that project too!

Thanks donray i finally feel good about it. The barrels sound like a good idea i appreciate the tips I do have a fan

could someone please post a pic of this procon heater

6,000 BTU'S should be sufficient for you. I think a while back you said you had an Attwoods come in? They carry them too. They range all the way up to at least 30,000 btu's.

Here is a link that might be useful: pro-con

Forget the previous, it has no thermostat. Here's a better selection. 10,000 BTU propane, radiant heater is a good choice. They say it heats the objects but you can feel the warm air too.

Here is a link that might be useful: pro-cons

Pro-Coms!! My bad.

Hey topher2006 I use those very cheap yellow halogen work lights. I put 2 in my enclosure and the temp went up ALOT!! more then it did with a heater. Its also convienent because you point the light any angle and thats where the heat goes.

Mike i actually am going to put 2 in there i was thinking 1 on each end i realy would like to stay with electricity if i could and only use propane for a back up.

Mike what wattage are these lights ?

250 watts each

Hey Topher,I did my first trial run heating my g/h(20'Lx10'Wx5'H-it is arched so not a sqaure roof as you know)I used a 1500wt heater like you get at wal-mart for $15,we hit 12F last night and the lowest it got was 27F inside(2' off the ground)this will work for me to about 0F -5F but I think I will add another layer of palstic,should be able to get another 5-10F,I hope.Your g/h is better insulated than mine,so I will be interested in what you chose to do and what temp bump you get-

Hey jim believe it or not i bought a patton utility heater from Wal-mart it got down to 26 here last night but my green house stayed 60. i am very proud of this little heater it has a fan to circulate the heat and also a thermostat to turn it self off and on.

Picture of heater?

http://www.westsidewholesale.com/catalog/product/view/s/1500-watt-utility-heater/id/4722/

Here is a link that might be useful: http://www.westsidewholesale.com/catalog/product/view/s/1500-watt-utility-heater/id/4722/

Thanks T,I may check out another heater but I think what I really need is another layer of plastic,if this adds 10F over the 15F bump that would cover me to -10 outside which I think would be enough,thanks again!

you bet we gotta huddle together during these winter months lol!

How true!