Hi All! This grey, freezing February is only made better by seeds catalogs, garden planning and planning our new greenhouse we are building.

It will be a leanto style, long wall southern exposure against a woodstove heated, free standing garage. The footprint of the greenhouse will be 11x16, wood framing with 10mm double wall polycarbonate walls and roof. the low wall will be 6ft and the high point at approx 9'8".

My question is, has anyone moved heated air using a fan from an adjoining structure into their leanto greenhouse for heat? The woodstove is literally on the other side of the garage wall. We typically burn wood all the time during cold weather because we have water running to the garage. I will use a propane heater as supplemental heat when needed, but don't want to use it primary heat full time. We are located in zone 6A.

Cheryl

If anyone has, how did it work for you?

I do plan to put the fan on a thermostat. Thanks all and happy gardening,

Hi Cheryl Do have a window from the garage to the GH? if you do it should work .Facing south you could heat the garage from the GH during the day.

Hi Bob - hope you are staying warm in NM.

No, I don't have a window into the garage where the greenhouse is being built. My plan is to put a transfer fan with a thermostat in the wall near the woodstove to blow heated air into the greenhouse. I just need to figure out the CFM size. It can't be too large frame wise because we will not cut any studs (16"OC) to fit it in.

Stay warm and thanks for your response.

Hi Cheryl @cherylkemp and welcome to the forum

Sorry, I don't have any advice regarding your question, but I just wanted to welcome you.

If you can't find a fan with adequate CFM that fits between the studs, you can always use multiple fans to attain the CFM needed, but I guess you already figured that. .

And, remember, we always love to see pictures in this group!

Jim