Trenches - Step by Step DIY Geothermal (Part 2)
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- Опубліковано 10 вер 2024
- Here, I am giving you a step-by-step guide to diy geothermal. In part 2 I am talking about the soil temperatures and trenches. If you saw my original diy geothermal video and was wondering exactly how to install the geothermal system, this series is for you. While not all aspects of ground source heat pumps are diy, some of it is. The temperatures of the soils at different depths will shock you. As I've always said, the deeper, the better. Trenches are another area where you need to know the safety procedures near them, as well as how and where they need to be laid out. Who would have thought digging a trench can be so complicated?
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Garrett- great overview of the "how to ' of Geothermal. The tool and process to seal the plastic tubing is something any plumber who runs the same plastic (in yellow or orange) for gas pipe will have. Talk to your pipe supplier also. Personally, I like the answer you chose- bring the return end back to the in house manifold without a joint. The plumber in me sees the best way to avoid a leak is to avoid a connection or joint if at all possible. In engineering parlance- "Less is more". FR
Agreed
I think that was very smart to bring the ends of the loops inside the house. The pipes are so inexpensive, it doesn't make sense not to bring them inside because maintenance is very easy as well. And if one fails you're not digging 10 ft deep to try to find the manifold. Thanks.
Thank you for the tip about putting it under septic lines. I keep going back and forth on whether my property is suited for it. I have a 9-ft backhoe attachment for the tractor and just did a project where I dug about 8 ft deep with a 2-ft bucket. I'm waiting for the series to close before I start nailing you with questions. :) I've enjoyed all your videos so far. Thanks
I have a little bit of experience in control systems enough to be dangerous with ideas. Ultimately, I would like to use my 25000 gallon pool and a geothermal loop to exchange with the house. My 1910 house has a boiler and hot water radiators that has been converted from coal to gas. Needless to say it could use an upgrade but I do love the radiant heat given the insulation of parts of the home. It would be awesome to connect the pool, a radiant loop, two HVAC units, and a boiler system to work together. I don't know whether it's crazy or not.
Nicely explained without any fluff.
@ 9:23 "In my opinion the deeper, the better" 😂🤣
That's what she said
I just watched your second video and I am on track ( same page ) with your teaching information you provide here...
So glad to hear about the septic correlation I commented in the previous video about it and you answered it here thanks. That’s what I am starting now.
Thanks!
Thank You!!!
Great video
Small cape (1200sf) oil-fired HW radiators. A single window a/c is adequate. If I finish 2nd floor, I'd need central and some heat. A small addition on side (16x24) would need footing & frost-walls. Can I loop coils along this 56' of footing (inboard or outboard) ? My soil is rocky/sandy if I backfill with better material ? Roof run-off can help keep moist, 4-5' down under perimeter plantings. Sound like I should just use heat pump ?
You want to keep the loops at least 10' away from the structure, so you don't pull heat from the structure.
really love your suggestion to trench 4-6' & then dump another 4-6' clean soil on top. potentially much cheaper for people w/o their own decent excavator. also... a lot of the properties i've looked at don't have much privacy from the road, or someone has already cleared for a pad closer to the road than i'd like to be. do you foresee any issues in planting trees & tall privacy shrubs on the newly created mound above the coiled lines? our previous chat about irrigation for dry/rocky soil also comes into play... many birds with one stone?
I wouldn't plant anything with a tap root. All others should be fine though
Did you use a backhoe to dug it in? I'm considering putting a system in, but am wondering if a 6' trencher is deep enough in central Indiana.
Anyone have any info on Alberta Canada soil? I know the frost level is 5 ft apparently, which would suggest at least a 32 f ground temp which would move this chart ^^^ down 30 f, making geothermal impossible? But there's a chart in ottawa suggesting 6-8 celsius at 6.5 feet.
Very interesting points you make, thank you for sharing your knowledge.
Do you monitor your incoming water temperature? If so, how well does it correlate to your graph?
I haven't monitored the water temp long enough to compare to the graph. Any time I've done it, was short term burst of data.
Thanks for the video! You mentioned that only PEX A can be used. I wonder why?
Pex A is stronger
@@Challenged1 thanks for your reply! I cannot find any documentation to support that statement, they seems to have same strength. Do you have a document or a link where I can find such info?
@@justdoityourself The burst pressures, flexibility and kink resistance are different between the two. Also, the International Ground Source Heat Pump Association recommends only HDPE or Pex-A.
@@Challenged1 I agree that type A has its benefits, but seems that there is no reasoning why type B cannot be used. I already bought it, so will go with it :) . Any recommendations on the max loop length of 3/4" pipe? Would 300 ft be ok?Thank you!
@@justdoityourself It all depends on your soil types and moisture content as to how long the loops should be. I'm in fairly moist clay soils, so 600' per loop is the recommended amount.
Is it possible to bury the lines underneath the foundation? Say, dig trenches, lay the pipes, cover it all up and then lay your foundation over it all. If your foundation is already deep (you’ve got a basement) then you’ve got yourself already a pretty deep place to bury those pipes.
No. The weight would crush your pipes. Also, you want to have the loop field at least 10' away from your home so you aren't drawing heat out of you home.
Garrett, What do you think about the DIY well drilling rigs.....they are suppose to be able to drill up to 200 ft. And as I understand it, it is about 150ft per ton.
I don't know anything about them. In my area, you have to get a permit to drill a well and be a certified well driller. Considering the possibility of contaminating the ground water supply if a well isn't drilled or capped properly, I'd rather leave it to the pros.
I live in South Carolina all I want to do is make a system that in the summertime will make the inside of my house cooler by at least 30°, then the outside temperature how deep do I have to go in my yard to do that.? I want to keep it simple and cheap yes I said the word cheap I'm on a fixed income and I'm trying to save money on my utility bill not spend it.
You have to know the ground temperatures in your area at different depths to answer that question. It won't be cheap, relatively speaking
😎✌🖖👌👍😁
Thanks!