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1
 Calculate the cost of heating and cooling a greehouse.
The question is best answered by using an example, but first some formulas: Watts=amps*volts 1 KWH = 3,413 BTU 1500W electric heater produces 5120BTU Propane is 91,600BTU/gallon Q=deltaT*A/R Q=BTU heat requirement per hour delta T is the
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2
 How do I heat my greenhouse in the winter?
Add data here. Entered by orchiddude
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3
 What is thermal mass?
Thermal mass is anything in the greenhouse that absorbs solar energy and heat from the sun during the day and releases that heat at night. Using thermal mass can moderate greenhouse temperatures and may reduce energy costs. Many things can act as
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4
 Greenhouse foundation
A greenhouse may be built upon a foundation of timbers, block, brick, or concrete. Elevating the foundation has the advantage of gaining height and headroom in some greenhouses. The greenhouse foundation should be stable, level, and square. A pop
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5
 Is humidity important? How can/should I try to control it?
Proper greenhouse humidity is important both in preventing plant diseases and promoting healthy plant growth. High humidity can promote the Botrytis and other fungal diseases. High humidity also restricts plant transpiration, which in turn limits eva
  Frequently Asked Question  -   Found at:   Greenhouses & Garden Structures Forum FAQ Directory

6
 How much ventilation do I need?
Ventilation is so important in a greenhouse. Air movement will lower temps, remove hot or cold spots and help create micro climates for your plants. Winter time ventilation helps to heat the greenhouse evenly, while summertime ventilation will help r
  Frequently Asked Question  -   Found at:   Greenhouses & Garden Structures Forum FAQ Directory

7
 What are the different types of glazings?
The ideal glazing will transmit light well, yet not transmit thermal infrared, the wavelengths at which the solar energy absorbed in the greenhouse is reemitted. The ideal glazing will also have a high R-value, will be inexpensive, and will last a lo
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8
 What are the different kinds of glazing materials, and what are their strengths and weakne
The ideal glazing will transmit light well, yet not transmit thermal infrared, the wavelengths at which the solar energy absorbed in the greenhouse is reemitted. The ideal glazing will also have a high R-value, will be inexpensive, and will last a lo
  Frequently Asked Question  -   Found at:   Greenhouses & Garden Structures Forum FAQ Directory

9
 Heating my greenhouse
       • Posted by: brandond on Wed, Jan 6, 10 at 10:45
              • 77 follow-ups, last one posted on Fri, Jan 22, 10 at 17:54
Wow now this is some kinda cold weather we are having in SW Missouri. IM certainly convinced we are in some super cold cycle, confirming what I have thought all along about the global warming craziness. Thats not what I wanted to talk about though
  Forum Message  -   Found at:   Greenhouses & Garden Structures Forum

10
 Subterranean Heating/Cooling System
       • Posted by: maryhm on Sat, Mar 22, 08 at 9:48
              • 150 follow-ups, last one posted on Tue, Apr 1, 14 at 17:41
In my internet wanderings, I came across this site: http://www.sunnyjohn.com/indexpages/shcs_greenhouses.htm Sounds like an interesting and fairly inexpensive method. And they actually listed a greenhouse that is implementing this process in
  Forum Message  -   Found at:   Greenhouses & Garden Structures Forum

11
 My First Winter - Bubble Wrap, heat...?
       • Posted by: fuzzymoto on Fri, Aug 1, 08 at 11:08
              • 51 follow-ups, last one posted on Sun, Oct 13, 13 at 8:50
My greenhouse is finally up, and of course we're heading into winter. Since I'm in Zone 4-5, and the greenhouse is all glass, I suspect I'm in for an interesting winter. I'd like to try to keep the GH in the mid-60's range, but I suspect that wo
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12
 how do you heat your greenhouse
       • Posted by: thinkdirt on Thu, Jan 25, 07 at 17:01
              • 43 follow-ups, last one posted on Tue, Nov 6, 12 at 11:33
Hi everyone, I live in Ohio and I recently purchased a new greenhouse 10 X 14 walls made out of waffle plastic panels, it is quite different from what I am used to. I currently have 2 heaters in it and it doesn't seem to keep the temperatures
  Forum Message  -   Found at:   Greenhouses & Garden Structures Forum

13
 compost as a source of heat for the GH
       • Posted by: wildlifegardenermt on Thu, Jan 8, 09 at 22:39
              • 38 follow-ups, last one posted on Thu, Oct 28, 10 at 16:53
I've been reading the posts, and there has been a lot of discussion about passive solar and other heating options for GH's. I am still in the planning stage for my small (6' x 10') GH, and I was thinking about putting a compost bin inside the GH.
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14
 Heating Greenhouse w/ Hot Tub Heat??
       • Posted by: birdwing on Mon, Mar 20, 06 at 14:17
              • 19 follow-ups, last one posted on Sat, May 25, 13 at 5:14
I referred to this on another thread w/ the photos of my GH in progress but I wondered if anyone else had ever done this or heard of it being done. My husband has a plan about how to do this & he has some pretty unorthodox methods as a rule but I'
  Forum Message  -   Found at:   Greenhouses & Garden Structures Forum

15
 Who else is crazy to heat a GH during the winter?
       • Posted by: qrper on Mon, Jan 3, 11 at 16:44
              • 35 follow-ups, last one posted on Fri, Feb 4, 11 at 16:33
I just came in from my greenhouse. Nice and warm. Smelled great. Lucky the sun was shinning as the temp inside was hitting a toasty 82 degs. But when mr sun goes to sleep, it dose not take long for the heat to slip away. I'm trying my da
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16
 Heating Mats
       • Posted by: susandonb on Sun, Feb 17, 08 at 18:37
              • 51 follow-ups, last one posted on Fri, Apr 5, 13 at 14:58
Hello, Well, we are about finished building the greenhouse, just a couple more things to do before we are ready to start seeds. QUESTION: I have been pricing seed mats for those seeds which need warmer soil to germ. As we are pinching penn
  Forum Message  -   Found at:   Greenhouses & Garden Structures Forum

17
 heating with compost?
Hi all, My first post to this forum. I'm just about to complete my first greenhouse, built on the cheap with recycled cedar and spruce lumber, a set of
    -   Found at:   http://forums.gardenweb.com/forums/load/strucs/msg1015481727287.html

18
 Heating a greenhouse / indoor pond
       • Posted by: hen11 on Mon, Feb 5, 07 at 14:41
              • 55 follow-ups, last one posted on Mon, Dec 23, 13 at 22:50
Hi there I'm just finishing off building my new greenhouse. It's slightly bigger than my last one so I was thinking of some cheaper/more reliable ways of heating the place (i've had some bad experience with heater failures recently). I'm think
  Forum Message  -   Found at:   Greenhouses & Garden Structures Forum

19
 What's all this about heat sinks?
       • Posted by: bcfromfl on Fri, Mar 9, 07 at 20:31
              • 44 follow-ups, last one posted on Thu, Oct 2, 14 at 19:49
OK, Ill bite. Im in the design stages for a better greenhouse, and know the problems associated with heat gain. I like to think Im pretty open-minded, and open to all suggestions with regard to heating and cooling devices. I certainly don
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20
 Cost Effiecent Heating for a Greenhouse
My Wife has decided that she wants to grow her flowers all year round. I just bought her a 6 foot by 6 foot by 6 1/2 foot clear plastic
    -   Found at:   http://forums.gardenweb.com/forums/load/strucs/msg112205045871.html

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