Geothermal & Hydronic Heating System
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- Опубліковано 12 вер 2024
- This is a new style DX geothermal heat pump which is wayyy more efficient than the water ground loops. It heats the house with in-floor loops and seems to work pretty well (so far...ha!)
I got about $23k Canadian in my system which includes the cost of drilling my well and pump. It is a pump and dump water system and I needed a well for household water anyways, it was all done on a new build so a regular furnace and well would have been about 17K so my extra cost for geothermal heat was only 6k which was paid back within 3 years. Since I added solar it is now utility free on my 100% electrical home.
The system I like to use comes from back east where you are. It is a Nordic pump made by Maratime geothermal. I am using thier DX heat pumps as aposed to their conventional pumps. You can go on their site and read up on them. On this system we excavated and laid the pipes in horizontal trenches under and beside the home.
Thank you for your comment and observation.
Yes..the chart you see on the nordic heat pump does show lower cops for the DX model.
I have spoken at length with the engineers at Maritime Geo and was informed that those figures are
due to the method of calculation. The Dx models achieve the same cops as the water models.
It is also and apple/orange thing. The water model uses entering water temp. while the DX uses saturation temp.
If you have the room , horizontal will be cheapest. I just did a vertical borehole field and it cast about $2000 per hole, each hole pulls about 10,000 btus. The loop field in this video is horizontal four loops and my cost was abou $2500 including the 1600 feet of copper pipe and my brother excavating for the complete ground system.
The pump will be between 7 and 9 grand depending on what size you need. My cost on this last system was about 20 grand with an extra fan coil and duct work for additional cooling....now add labour on that.
The water model idles at low speed while the Dx model runs only on high speed, but remember the water model needs a pump
pack of one one more pumps to circulate the fluid through the ground loops. The Dx model requires much shorter ground loops
then the water style systems as the copper is about 7 times better conductor so drilling or excavating cost is lower.
Now the stickler is always the soil condition.
Do they still make your direct exchange heat pumps from Nordic?
The cost of placing the ground loops is very different on account of your soil condition. The DX system only needs 100-120 feet of borehole if you decide to drill a vertical loop field. You need about 150 feet of trench if you go horizontal. This differs fron conventional where you may need 600 feet or more depending on soil condition in your area. And that is per nominal ton of heat.
Hydroniclly heated floors are defiantly the way to go.You need to make sure you design it to accommodate geo and proper loop layout for house design and temperature. If you figure your square footage and double it you will be in the ball park for the length of tube in the floor. I pay about $.25/ foot for the tube here...my cost. I used Tekmar controls and rehau manifolds which are top of the line..you can go as cheap as you like..at about $3500..this gives the ability to cool the floors too.
If you install either system in dry sand or gravel you may be one of those people that say geothermal
doesnt work. If you dont size the system properly for your design heat load you will say geo is no good. If you install your system properly in solid rock or wet soil you will be smiling all year round.
Interesting heating system.
Nice system! I only saw one issue on your water heaters/tanks; galvanized to copper connections on the inlets outlets. This will cause internal corrsion of the pipes. It would be a shame to see such a nice system have unexpected issues...
yes. good observation. that has been rectified with brass nipples. You didnt catch the feed regulator and backflow are also installed backwards in the video, which was righted also.
thank you for your comment.
Now couple that with hydronics and you gain another %20 over forced air and couple hydronics with controls that use outdoor temp. reset and indoor feed back with zone sycronization and you pick up another $20 to %45. WOW.
If you require more info on the cop calculations I can get it for you.
Thanks again.
You seem very knowledgeable about these systems. Whats the price to install one of these systems? Im just wondering that because I am curious of what the payback period is. I live on the east coast of Canada so I think I would have similar weather trends. Thanks