I had trouble convincing Holly that a pretty GH is not a cheap to heat GH. When she got the 1st year heating bills she changed her mind.

Looks efficient, @Chris1948. What sort of solar blanket material are you using?

I used this Ken - http://www.lowes.com/pd_13353-... but it's 24" by 25' instead of 16". It was the same price though.

No, I meant the "bubble" material covering the greenhouse, not the reflective material.

Not using any Ken. What you see is the greenhouse material. I was going to buy a couple of the solar pool covers but decided to give a try to closing off the north ends. With the heater on low 9,000BTU/hr in the new one it was 35 outside and 52 inside last night. On the old one with the orchids I have the heater setting a little back from the tables I have them on but the temp difference was about the same.

OK, sorry for the poor eyesight.

Anyone ever use moving blankets as curtains? I saw this the other day and decided to try it. I bought 3 and used in with the bubble wrap but it hasn't really been that cold since I bought them. I do think I may have put up the bubble wrap too early so I took it back down today. However, I only places it over my windows, not the ceiling. I would like to actually cover my roof and windows from the outside but remove it during the day for more sunlight. I am spending too much money trying to find something to hold heat. I also have 3 black trash cans of water against my north wall but its not heating up. GH is 12x16 with 10' ceilings and on concrete floor. I used large windows from a house built in 1905 on my south and west walls. North is completely covered and east is 80% covered. I have used 2 different heaters with a little luck but it's not even really cold yet. I don't want a high electric bill all winter. Thinking of using a propane heater. Suggestions?

I use a propane heater from Southern Burner. No electricity needed. Thermostat is a millivolt type. Pretty much bullet proof. Constructed of stainless and aluminum. My current greenhouse is 15x16 with 10 foot peak. It stays plenty warm. Before this I had the same heater in the Memphis area. Worked well there too.

The best insulation over bubble wrap came several years ago when DH bought a 70" TV to celebrate his retirement. He was excited about the TV. I was excited about the foam Mylar wrapping! I cut it apart and it covered 12 ft of the north wall. What's more, the sun reflects off the Mylar to help warm the gh in the day. Added Mylar backed foam insulation boards to the outside held in with bungee cords and that wall with the north exposure is covered well.