Fans for Earth Tubes
We are building a 24′ x 60′ barn to house a breeding flock of chickens. We would like to keep the interior between 5 – 25C and have installed 6 x 100′ loops of 4″ tubing at a depth of 8′ to circulate air for winter warming and summer cooling. The problem is finding the right fans to blow air through the tubes. I’m assuming we will need input and output fans. We would like this building to be off grid, so I would like fans that could be run with DC from solar panels… but I’m not finding any such thing. How do people push/pull the air through earth tubes? We are in climate zone 6a.