Greenhouse 2.0 – Geothermal AND Compost Heating (Part 1: Design)

Greenhouse 2.0 - Geothermal AND Compost Heating (Part 1: Design)

Geothermal heating results:
Compost heating results:
With the benefit of several design iterations and much constructive feedback from my viewers, I’m unveiling PASSIVE-HEATED GREENHOUSE 2.0! The new design incorporates BOTH Geothermal GAHT (Ground-Air Heat Transfer) and Compost heating. The GAHT system is now closed (no exposed dirt), with the pipe laid in a U-shaped configuration, the first I have seen on YouTube.

Subsequent videos will show performance data


Morgan Brown


What do you think?


Written by Aleksandar

Video MakerContent AuthorYears Of Membership


  1. 4:22 I have a way to dig such a large and wide "U" shaped hole. You will first need to raise and train at least one or more burrowing animals. Prairie dogs come to mind, for a few good reasons. They are already accustomed to working together in groups, and can also climb their way back out of a vertical shaft, plus they are natural guardians at keeping cobras and pit-vipers etc. from occupying your heating/cooling shafts. This will undoubtedly be a challenge, and may require back-filling certain parts of the system, but I'm confident with proper guidance and equipment, along with the benefit of selective breeding, I think you could have a decent chance of having a workable tunnel system to meet all your heating cooling needs within a few generations or so. Best of luck, and please share any upcoming videos showing the progress of your work! 🙂

  2. if I did that much mess around the house, the wife will kick me out hhhh, why not just use a tiny thermal solar collector with a small radiator inside

  3. Thanks for sharing I think the 2 pipe vertical with water as the medium for heat absorption is a better way to go and drilling the holes with the garden hose and pcv pipe means you can go much deeper if the rock is deep enough.

  4. I have a question… The two holes you dug next to each other, couldn't you have just dug a single hole the size of the two, pushed the pipe down and then filled it with dirt? The PVC bit was ingenious for what you are doing but it seems like a lot of extra work that could be done easier; unless I'm missing something or course. Thanks for sharing!

  5. I am digging a 30 ft trench at 3ft and am using a 4 inch pipe for cooling but was going to cool outside air but am now considering cooling the inside air to reduce humidity.

  6. I have done a lot of temperature measurements at various underground depths, and many experiments. I have a different way of thinking about the heat which exists underground. The heat just naturally rises up out of the ground ALL WINTER LONG. No tubes are necessary. The problem is that the heat of 60 degrees F will dissipate QUICKLY on a cold winter day, and it is as if it doesn't exist at all. The solution is to insulate the greenhouse as much as possible to stop the heat loss. If the sidewalls of the greenhouse was earth-bermed… or buried, that would eliminate much of the heatloss. Many people are building underground greenhouses and are growing vegetables all winter. check out this guy in nebraska growing ORANGES all year… even in the snow His underground tubes extend way OUTSIDE his greenhouse. It makes no sense to put the tubes under the greenhouse because that heat would rise up anyway into your greenhouse. The man in Nebraska has several horizontal tubes outside his greenhouse which brings additional 52F warmth into the greenhouse.

  7. I have a few ideas you mite try. First, your pipes are too big with too much airflow. If you eliminate the fans and use natural convection it should be more than adequate. Just cut of one end of the existing pipe at ground level, maybe extend the other end a bit. The slower movement will give more time for the ground to heat the air. This should be very easy to test next winter.

  8. Radon…just check with a detector…you will know. I really do not understand how people just go berserk or fixated on a particular "health concern"! Earthship Biotecture (Michael Reynolds)…build the house house and greenhouse to feed your family!

  9. Interesting method with vertical tubes occupying less space. But studying the subject, I have found that in several systems installed it needs to have a way of draining the water that can form by condensation or infiltration over time. Moisture favors the creation of fungi – mold. In this case, the installation of the horizontal tubes may be more practical taking advantage of the gravity. With aluminum gutter pipes you will less space than plastic tubes. Probably over 200 feet.

  10. Thank you for the video! Very well explained with diagrams.
    The only way I know to dig a hole in horizontal way would be with very expensive (100k) oil digging drills.

  11. Have you seen the old man in Nebraska can’t think of his name at moment but he has huge geothermal hoop houses and his lines run 8 ft deep 80 ft long and he has 7-8 tubes per 80 ft green houses. Has a bunch of citrus trees growing amazing. Cheers curious on how this goes and the temp readings. Also the old man uses a back how to install his tubes

  12. You might want to rethink the compost setup. Pile/heap size plays a crucial role in the overall process. Limiting the volume with multiple stackable bins, although convenient, will prove difficult in getting everything started, up to temp and those conditions maintained. Colder climate exacerbates the issue and the typical outcome is anaerobic is problematic. Using a tumbler is one possible solution given the space you're working with. Meets your "modular" criteria when installed on sliding rails or by adding hinges to the compartment top. Your compost is now entirely contained in one easily accessible bin providing ideal capacity. Icing on the cake: less than half the cost of the stackables. Maybe it's not too late to return them?

  13. I can't have the only partner who thinks their solution to everything is 'dig the hole in an intelligent place to save lots of work and an arrangement of tubes.' 😀


3 Types of Fig Trees Starting in the Greenhouse

3 Types of Fig Trees Starting in the Greenhouse

Gardening With A Four Season Passive Solar Greenhouse: Case Study

Gardening With A Four Season Passive Solar Greenhouse: Case Study