Aleksandar
Ceres Greenhouse owner, Stephen Butler, will explain how the GAHT® (Ground to Air Heat Transfer) System operates in the moist climate of the Pacific Northwest. Learn how a GAHT® System can heat and cool your greenhouse using the temperature of the soil underneath.
To learn more, visit https://www.ceresgs.com/?utm_source=youtube&utm_medium=youtube_description&utm_campaign=youtube_organic&utm_content=gaht_system_pnw
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all righty the GAHT® system as you know as
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two layers we’ve got the one layer of
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tubes down at four feet the second layer
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at two feet and you catch the big tubes
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in the back that take the air off from
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near the roof and then the smaller tubes
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up here in front that push the air out and
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so we were curious in the summers to how
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it actually worked so once we finally
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got things hooked up and ready we
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started running it on some fairly warm
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days to actually push the heat from
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inside the greenhouse down into the rock
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and we discovered that it has a very
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good air conditioner to keep the
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greenhouse cooler in the summer
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occasionally the exhaust had to kick
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on to produce a little extra cooling
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when we got up above I think I have it
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set at 85 degrees for that and then as
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we cooled down an exhaust fan no longer
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working during the day we started
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getting some of the colder nights here
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as we said earlier we’ve played
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with freezing a few times probably 30 or 29
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degrees something like that I’ve noticed
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is the at nighttime it’s usually still
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above 50 degrees by midnight and then
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shortly after midnight I’ve seen that
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occasionally dropped down 49 to 48 I think
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a coldest morning I saw was 47 and we’ve
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got the GAHT® system turned off right now
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otherwise you’d be hearing that low
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Rumble in the background but what we
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found is it is picking that heat up from
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down below and keeping this thing fairly
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warm throughout the day now on these
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cold wintery days where in the North
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West were famous for the liquid sunshine
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except it usually is not too much
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sunshine with the liquid but I’ve
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noticed that that maybe the GAHT® will run
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all day long pulling the heat up out of
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the ground
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the other thing we’ve I’ve noticed is
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that if it’s really humid in here and
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we’ve got a nice warm day I can pick a
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lot of humidity up and dump it down into
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the rocks and actually warm those rocks
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up and then recapture that heat at night
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they’ve actually comes back and keeps
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the greenhouse a little warmer at night
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I think right now we’re at 56 degrees
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according to that one thermometer over
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there and outside is what mid-40s right
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now so there are times where you know
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outside catches up with the greenhouse
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and stuff but when it gets cold outside
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this stays you know 10 to 15 even 20
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degrees warmer than the outside in
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the early morning pre-dawn hours
Ceres Greenhouse Solutions
I have a 6×8 greenhouse. I use a 20 gallon water heater and water pump which goes through a auto heater radiator with a radiator cooling fans blowing and sucking both sides to get enough air flow, which needs dc power supply to run the fans. I have a thermostat which turn the fans and pump off and on when it reaches a certain temperature i've set. The cost is very small I have notice very little change in electric cost. I keep it 60 degreez all winter long. I have a sensor in greenhouse that i can read the temp just to check if its working fine. Been using this for several years now.