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Has anyone used underground piping before to cool a house? Answered

I bought a 110 Victorian home in Middle Georgia and was studying about installing underground piping to help cool the house. Has anyone experimented with 5 inch PVC before underground to cool with? I took a study of temps in the house, attic and crawl-space to see if I pulled air from the crawl space, I could use that cool air to help circulate in the house to assist cooling. I found that the crawl-space was actually as close to the outside temp. It wouldn't help. I then studied using piping to put under ground about 3 feet and use a to-and-from push fans then tie it into the fan-only central heat and air system. I then wonderered if I would cause a positive preasure issue. I haven't tested it yet, but I think the ground temp is about 68 degrees constant if you go at least 3 feet deep! Any comments?



3 years ago

Have though of. Read up on. Two different PHd. writings. And it should work well. 12'' isd. by 100' long x 10' deep. Two pipes 6" dose not = 12 isd. Have read were this has worked in Florida too. And, works in very large houses with just a window fan. I'm planning on two 24" pipes. You should be able to bring winter air into your heater. Pre heat it to 55-57. And if it's 20 out side it should heat it to 55. Saving you 35f as a pre heater. I've seen air piped right to windows to cool them. Yes this should work very well.


3 years ago

I have toyed with the idea and plan to put the pipes 5' down and irrigate above them for added cooling. The ground around the pipes can warm up the earth after a period of time, hence the irrigation. 1) you can put smaller pipe within a larger pipe (honeycomb) that gives the air extra surface for cooling. 2) you can circulate late night air thru the pipe to help cool the earth back down. Use a bypass gate if you don't need the late night air for cooling and pump it into the attic to help cool it down.

There is a magazine called Farm Show Magazine where farmers are always making new things and there have been 5 or 6 articles about heating and cooling the home with underground piping during last two years. My neighbor has offered the use to furnish a backhoe if I can find a heat pump dealer in this rural area. According to all the people who are already using the system there is a great saving on electricity!


8 years ago


this is for heating in winter, but doing it by pumping excess heat from the summer sun into the ground.

if it's hot all year round, start by painting your roof white?

I have been researching and building test systems using this idea... but have not built a WORKING unit yet... my years of work have resulted in finding the ONE BEST system i have ever seen... and the unit i will finally BUILD will be patterned off of what THIS man has already built... and DOUBLE BONUS... it is an instructable !!!  so click on this instructable and see if you can find anything BETTER than what he has done. 


I have placed TEMPERATURE PROBES at various depths underground.... and my results here in the midwest USA are summarized here:


    1ft.. 80 F
     2ft...74 F
     5ft...67 F
     10ft..60 F
      20ft...58 F
      groundwater.... 56 degrees F.

If you want to really cool the house, you need to get down to the GROUNDWATER.  You live further SOUTH than me (st louis) so your temperatures will be a few degrees HIGHER.

George Bush has that kind of thing on his Texas ranch house.

You might try and search for "earth tubes". In the right kind of climate, they can do what you want, moderating air temperatures both ways, warming in the winter, cooling in th esummer

Yep. Lots of people have tried and made it work. Lots have tried and failed. There should be lots of info on the net. If you decide to a/c you could use a geothermal system that uses the ground to heat and cool the coils of the a/c unit. If you use the cool air from in the crawl space once you start drawing it out it will warm up and be less efficient. I was going to write a bunch more things that I have learned over the years of designing homes but then googled "underground cooling". If you haven't done that, please do so now. You will get more info. than you can digest in a month. Good luck.