Greenhouses forum: Temperature management in high tunnels

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Name: Sandy B.
Ford River, Michigan UP (Zone 4b)
(Zone 4b-maybe 5a)
Charter ATP Member Celebrating Gardening: 2015 I was one of the first 300 contributors to the plant database! I helped beta test the first seed swap Region: United States of America Region: Michigan
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Weedwhacker
Feb 13, 2012 8:35 PM CST
good info on temperature management in cold-weather hoop houses

http://www.uvm.edu/sustainableagriculture/Documents/HighTunn...
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Name: Rick Corey
Everett WA 98204 (Zone 8a)
Sunset Zone 5. Koppen Csb. Eco 2f
I helped beta test the first seed swap Plant and/or Seed Trader Seed Starter Region: Pacific Northwest Photo Contest Winner: 2014 Vegetable Grower
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RickCorey
Feb 24, 2012 6:51 PM CST
Thanks, Sandy! Some good ideas about alternative ways to support inner layers of row covers.

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Faisal
Sep 7, 2012 1:22 AM CST
Passive heating system could be help full
Name: Rick Corey
Everett WA 98204 (Zone 8a)
Sunset Zone 5. Koppen Csb. Eco 2f
I helped beta test the first seed swap Plant and/or Seed Trader Seed Starter Region: Pacific Northwest Photo Contest Winner: 2014 Vegetable Grower
Avid Green Pages Reviewer Garden Ideas: Master Level Garden Sages I was one of the first 300 contributors to the plant database! I helped plan and beta test the plant database. Charter ATP Member
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RickCorey
Sep 7, 2012 11:02 AM CST
Once I read about an idea where the concrete floor of a big greenhouse was laid down with shallow channels molded into it, then covered with sturdy lids. Water was stored there, warmed during the day and giving off bottom heat through the night.

I forget whether they pumped it through a heat exchnager during the day. I think it was some different scheme where the North wall of the greenhouse had black 55 gallon drums stacked up where the sun would hit them and warm the water.

It seemed to me that the first idea would be easier to do, and maybe last longer, if you poured the concrete floor around PVC pipes. 1/2" or 3/4" if you relied on pumps to circulate water through the floor from a reservoir, or bigger pipes if the floor WAS the reservoir.. Since heat rises, I would think that ther best place to collect heat during the daytime would be near the ceiling.

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