Heating in the Winter Months

The way nature works never ceases to amaze me.    In the first winter of growing year-round I had never scratched my head so much…. really! Shocked and bewildered on how the heat could stay in this 10’x12′ structure with nothing but plastic between my plants and winter in Ohio.   Everything from how much sun we receive to how much water is in the rain barrel can make up to a 20*F difference.    A very important design factor that helps with the heating and climate for the plants is the fact that to enter the greenhouse you have to walk through a potting shed that is well insulated.   Not having a door that opens directly to the winter in garden zone 5b makes a huge difference.  My friend Glenda up in zone 3 did an experiment on this topic that I will link to later in this blog post.

In the video above I share with you a peek inside my greenhouse the first year with a gas propane R.V. heater we recycled for our heater.  The heater was $25 on ebay and my electrical engineer ( AkA Hubby) added some duct work cost around $20.    If that heat should fail we have an electric heater from Walmart ($40) with a floor fan to circulate.  The electric heater is on a separate thermometer  to kick on if the gas furnace goes below 50*F.   The benefit of using an R.V. heater is if we lose power the furnace can run on a car battery.

If you have any additional questions concerning the heat source we use please leave a comment and I will do my best to find an answer for you.  Happy Growing!

Article by Bren

I'm Bren, a everyday gardener who loves to connect with others. I've been growing in my 10'x12' home greenhouse in Ohio since 2008. I decided to create Growing4Seasons.com to help others who enjoy growing year-round just like me!
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4 Comments Post a Comment
  1. It’s funny how you have the gas, RV heater as primary and an electric for backup. My old system was a propane/electric radiator system as primary with a propane, direct vent heater as backup (in case of power outages). Now it’s the same model propane heater with an internal electric fan as primary, and a kerosene heater to help fill the space if the power goes off and propane heater’s fan dies. (The first system worked for 17 years then everything wore out. I’m crossing my fingers that this pairing will work.)

  2. Matu421 says:

    I have a 12×16 greenhouse that I’m dying to overwinter plants in, I have an old rv furnace I want to use but am not sure how to hook it up. I know it needs 12v to run, I’m curious if a plug-in converter would work to power it. I plan to eventually convert to solar power, but do not have the money to invest in it yet. Where is the best location for the thermostat to b in relation to the furnace? I have circulation fans so I can move the air around quite well, heating is my issue! It’s just starting into fall and my greenhouse is getting down to 35* at night. I’m trying to keep tomatoes and I know this will not do! Can I hook the heater to a car battery and make it work temerarily until I can find a way to charge the battery efficiently? Any help is appreciated!!


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