GlennWest Posted February 9, 2021 Author Report Share Posted February 9, 2021 I found a heat pump water heater made up in 2 part system. Looks like a mini split outside unit. So fans, compressor outside. Uses CO2 for refrigerant. Works down to -20 F. https://smallplanetsupply.us/sanden-sanco2-heat-pump-water-heater-3rd-gen-43-gal-system/ Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
lappir Posted February 9, 2021 Report Share Posted February 9, 2021 6 hours ago, GlennWest said: I found a heat pump water heater made up in 2 part system. Looks like a mini split outside unit. So fans, compressor outside. Uses CO2 for refrigerant. Works down to -20 F. https://smallplanetsupply.us/sanden-sanco2-heat-pump-water-heater-3rd-gen-43-gal-system/ My mini split is working well in the +20's, will be 4 this weekend. Will see what happens then. If you are staying put as I think you are, why not use Geothermal for all? Rod Quote White 2000/2010Volvo VNL 770 with 7' Drom box with opposing doors, JOST slider hitch. 600 HP Cummins Signature 18 Speed three pedal auto shift. 1999 Isuzu VehiCross retired to a sticks and bricks garage. Brought out of storage the summer of 2022 2022 Jeep Wrangler Sport S Two door hard top. 2007 Honda GL 1800 2013 Space Craft Mfg S420 Custom built Toyhauler The Gold Volvo is still running and being emptied in July. Link to comment Share on other sites More sharing options...
GlennWest Posted February 9, 2021 Author Report Share Posted February 9, 2021 (edited) With geothermal I will have to run ducts. Also lot of trees on our property. Means lots of roots. I will research it it more though. I had not considered this. Thanks. Edited February 10, 2021 by GlennWest Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
GlennWest Posted February 10, 2021 Author Report Share Posted February 10, 2021 More I research geothermal heating and cooling it looks good. Wonder if radiant floor would heat home by itself. I am talking about Huntsville tx. Don't stay cold here. I will have a plain concrete floor when contractor finish. So be easy to add the lines. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Joe Spiker Posted February 10, 2021 Report Share Posted February 10, 2021 Glenn, I have radiant floor heat in my garage and it works fantastic. I put the lines down before they poured the concrete floor using PEX tubing. Have never regretted it. Joe Quote Link to comment Share on other sites More sharing options...
GlennWest Posted February 10, 2021 Author Report Share Posted February 10, 2021 1 minute ago, Joe Spiker said: Glenn, I have radiant floor heat in my garage and it works fantastic. I put the lines down before they poured the concrete floor using PEX tubing. Have never regretted it. Joe thanks joe. You stated garage so not like a living space. How comfortable is it. 70ish degrees? Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Barbaraok Posted February 10, 2021 Report Share Posted February 10, 2021 We had a house (quad-level) in Michigan where some of the hot water heat ran in lines laid in the floor on the ground floor level. Worked wonderfully for that area EXCEPT the copper piping developed pin holes and eventually we found a small damp area on the floor after a box sat in one place for 2 days. Only remedies were jackhammer the floor out, or reroute the piping so that it wasn't one loop for the whole floor, which is what we did. Of course the house was built in the late '60s, things have improved since then😉. I did love the radiant heating from the registers, no fans blowing, just warmth in the house and we are talking about Michigan in the winter - especially after we replaced all of the windows with thermopane ones. Quote Barb & Dave O'Keeffe 2002 Alpine 36 MDDS (Figment II), 2018 Ford C-Max HYBRID Blog: http://www.barbanddave.net SPK# 90761 FMCA #F337834 Link to comment Share on other sites More sharing options...
GlennWest Posted February 10, 2021 Author Report Share Posted February 10, 2021 Ya'll have me seriously considering this. Also no fan helps with my wife's allergies. I can get a backhoe fairly reasonably. The geothermal heat pump with hot water option priced right in line with ac plus hot water conventional. The extra cost is the pex tubing for floors and yard. I can put the underground loops in the clearing. 200' from home. Mini splits are very efficient but I have to have hot water also and a heat pump hot water system is expensive. About price of the geothermal unit. Need to decide before I have home built. He can put the pex in the concrete when pouring concrete. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Joe Spiker Posted February 10, 2021 Report Share Posted February 10, 2021 1 hour ago, GlennWest said: thanks joe. You stated garage so not like a living space. How comfortable is it. 70ish degrees? Glenn, I have heated the garage to the low 60's at times, generally keep it in the low 50's though. Since I'm moving around it's not uncomfortable and my feet stay warm because the floor is around 65 degrees. This is in a standard pole barn construction garage that has 3 14foot tall RV doors in it and is 25 feet to the peak of the roof. I have a 16 X 20 room built in it though that I use for doing finish work on wood projects and that stays at 67. Only because that is where I have the thermostat set. For a heat sourse I am using a commercial Rinnai on demand water heater that is propane fired. Hope this helps. Joe Quote Link to comment Share on other sites More sharing options...
GlennWest Posted February 10, 2021 Author Report Share Posted February 10, 2021 thank you. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
GlennWest Posted February 10, 2021 Author Report Share Posted February 10, 2021 Considering my home will only be 750 sq ft I really don't see an advantage in geotherm. I will have 6" walls so can achieve 30r in them. Seal roof well and about 45r and a 12k mini split should suffice. It only pulls like 5 amps running. With the circulating pumps on geotherm might actually pull more. Now in a large home, yes, geotherm way to go. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
noteven Posted February 10, 2021 Report Share Posted February 10, 2021 Hi Glenn - my last home and garage (20 years) was radiant floor heating in Alberta plains winter. It’s -25F here today... Anyway we always insulate with styrofoam with provision to snap the heating pex in then slab on top. Heat flows to cold on any direction so insulation stops your system from trying to heat the ground under your home to room temperature. Also if you are under building codes check to see if your hydronic heating system needs to be engineered. Quote "Are we there yet?" asked no motorcycle rider, ever. Link to comment Share on other sites More sharing options...
sandsys Posted February 10, 2021 Report Share Posted February 10, 2021 I have two brothers-in-law that used radiant floor heating in building or rehabbing. During Minnesota winters it is wonderful to take your shoes off and have warm feet. Linda Quote Blog: http://sandcastle.sandsys.org/ Former Rigs: Liesure Travel van, Winnebago View 24H, Winnebago Journey 34Y, Sportsmobile Sprinter conversion van Link to comment Share on other sites More sharing options...
GlennWest Posted February 10, 2021 Author Report Share Posted February 10, 2021 Oh, I fairly sure I will go with radiant floor heat. Just got to decide cheapest way to go, water or electricity. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
nash17k Posted February 10, 2021 Report Share Posted February 10, 2021 Insulate below the concrete as noteven pointed out. Lay out the pex on stands or chairs closer to the top than bottom. Water I suspect will allow you more options on source of energy required to create the heat. Quote Link to comment Share on other sites More sharing options...
GlennWest Posted February 10, 2021 Author Report Share Posted February 10, 2021 1 hour ago, noteven said: Hi Glenn - my last home and garage (20 years) was radiant floor heating in Alberta plains winter. It’s -25F here today... Anyway we always insulate with styrofoam with provision to snap the heating pex in then slab on top. Heat flows to cold on any direction so insulation stops your system from trying to heat the ground under your home to room temperature. Also if you are under building codes check to see if your hydronic heating system needs to be engineered. So you heating the concrete slab instead of the floor. Had not considered that. All pics I saw was on top of floor. What did you use for heating the water? I want to keep operating cost as low as possible. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
noteven Posted February 10, 2021 Report Share Posted February 10, 2021 We used stoker coal firing a modern external hot water furnace. 500,000btu output. Radiant heat is the most efficient. You choice of how the heat is supplied should be made by initial cost vs operating cost over time based in the efficiency of the heating plant. Quote "Are we there yet?" asked no motorcycle rider, ever. Link to comment Share on other sites More sharing options...
GlennWest Posted February 10, 2021 Author Report Share Posted February 10, 2021 Even the geothermal system uses a heat pump water heater. Just uses water instead of outside air. As long as the heat pump water heater is inside with temps in 70s, seems it would just as effective. If it was outside where temps get cold, geothermal would be better. Need to figure what size needed. Years ago, in a double wide, I installed a 75k gas hot water heater and pumped water Thur a coil, heat exchanger. Blower in duct blowing thru coil. Heated hole house in NC. It did use right much LP I remember. But I also had to keep that heater at 185 also. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
sandsys Posted February 10, 2021 Report Share Posted February 10, 2021 My BIL recycled the heat from the dishwasher back into the system. I'm pretty sure he used air instead of water for the heat transfer, though, since he circulated it through concrete ducts. Like I-beams but with open centers that ran along the ceiling of the basement to become the base of the main floor. That was back in the 1970s so all his technology was still experimental then. His house was so unique it was written up in the Home & Garden section of the Minneapolis Star Tribune. He now lives in Idaho and built a unique house there, too. His former wife still lives in that first house. Linda Quote Blog: http://sandcastle.sandsys.org/ Former Rigs: Liesure Travel van, Winnebago View 24H, Winnebago Journey 34Y, Sportsmobile Sprinter conversion van Link to comment Share on other sites More sharing options...
noteven Posted February 10, 2021 Report Share Posted February 10, 2021 I’m looking at a small metal building right now that consists of structural insulated panels with R28.5 in a 5” thick profile. Prefinished 24 and 26guage steel with high density foam. Quote "Are we there yet?" asked no motorcycle rider, ever. Link to comment Share on other sites More sharing options...
GlennWest Posted February 10, 2021 Author Report Share Posted February 10, 2021 I know they make them. I build such working maintenance while in NC. Who makes the one you looking at? Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Randyretired Posted February 11, 2021 Report Share Posted February 11, 2021 (edited) 1 hour ago, GlennWest said: I know they make them. I build such working maintenance while in NC. Who makes the one you looking at? I put radiant in floor heat in our present house and it is great. I looped 1/2" pex every 10" in the concrete slab before it was poured. It uses a high efficiency propane hot water heater to heat the water. This is a stainless tank heater with over 100,000 btu's. This water heater is so efficient it uses plastic pipe for the air inlet and exhaust. A small pump circulates the water. This system also has solar assist with hot water solar panels incorporated into it In floor heat is by far the most comfortable heat. Our annual propane bill for hot water and heat runs about $200 in Colorado. That is less than $20 a month. I would never want to go back to forced air heat or even hot water radiators. This system is planned for our new house also. As has been posted insulation under the slab is very important. New insulation standards require this now for any concrete floor in a house. I saw an ad for a heat pump that will heat water for infloor heat for moderate climates. It is a mini split type of setup and should be very efficient. It will cool some but in floor cooling doesn't work very well. Since heating requirements are not significant for Glenn's climate a simple mini split will be hard to beat. Edited February 11, 2021 by Randyretired Quote Randy 2001 Volvo VNL 42 Cummins ISX Autoshift Link to comment Share on other sites More sharing options...
GlennWest Posted February 11, 2021 Author Report Share Posted February 11, 2021 (edited) Randy I saw that unit researching. Looks just like our outside units. Saden SANCO2. Lowest setting on it is 130. Would that be too hot. Edited February 11, 2021 by GlennWest Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
Zulu Posted February 11, 2021 Report Share Posted February 11, 2021 (edited) 6 hours ago, GlennWest said: Oh, I fairly sure I will go with radiant floor heat. Do you have to be careful with running hard water in a radiant floor system? I know hard water ruined my AZ neighbor's swamp cooler. On another note, I'm looking into installing a DITRA electric floor heating system in part of our manufactured home. Edited February 11, 2021 by Zulu Quote SKP #79313 / Full-Timing / 2001 National RV Sea View / 2008 Jeep Wrangler Rubiconwww.rvSeniorMoments.comDISH TV for RVs Link to comment Share on other sites More sharing options...
GlennWest Posted February 11, 2021 Author Report Share Posted February 11, 2021 9 minutes ago, Zulu said: Do you have to be careful with running hard water in a radiant floor system? I know hard water ruined my AZ neighbor's swamp cooler. Well the water is city of Riverside supplied. Have not checked it for hardness. I could put a softner if needed. Thanks for the info. Quote 2003 Teton Grand Freedom towed with 2006 Freightliner Century 120 across the beautiful USA welding pipe.https://photos.app.goo.gl/O32ZjgzSzgK7LAyt1 Link to comment Share on other sites More sharing options...
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