Home » Public Forums » GMCnet » Use of coolant lines for internal heating ???
| Use of coolant lines for internal heating ??? [message #150976] |
Tue, 29 November 2011 14:51  |
glacierfl
Messages: 444
Registered: June 2011
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Noticed the coolant lines run under the coach to heat the water tank. Could these lines be used for heating the coach internally. Say running them through a shrouded radiator, running along the side of the coach inside ???. Seems like a waste having them external, when in the winter all that heat is wasted.... Wonder if shut off valves could be added also to turn off in the summer ???. One possible use attach to a home oil filled radiator, modified for coolant of course.... , that fits flat on the wall. What do you think, good idea or do i need to tighten up the loose nuts 
Steve & Debbie
Monticello, FL
77 Palm Beach :- Aurora
EX G4WDT
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| Re: [GMCnet] Use of coolant lines for internal heating ??? [message #150978 is a reply to message #150976] |
Tue, 29 November 2011 15:05  |
emerystora
Messages: 4442
Registered: January 2004
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On Nov 29, 2011, at 1:51 PM, steve & debbie wrote:
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> Noticed the coolant lines run under the coach to heat the water tank. Could these lines be used for heating the coach internally. Say running them through a shrouded radiator, running along the side of the coach inside ???. Seems like a waste having them external, when in the winter all that heat is wasted.... Wonder if shut off valves could be added also to turn off in the summer ???. One possible use attach to a home oil filled radiator, modified for coolant of course.... , that fits flat on the wall. What do you think, good idea or do i need to tighten up the loose nuts :d
There is a restrictor in the hose connection at the rear of the passenger head. This would have to be removed if you wanted to run the hose through a heater (other than the water heater). This restrictor is there to keep the flow rate lower to the water heater so that it doesn't overheat the water.
Emery Stora
77 Kingsley
Santa Fe, NM
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| Re: Use of coolant lines for internal heating ??? [message #150979 is a reply to message #150976] |
Tue, 29 November 2011 15:12 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
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Get yourself some radiant base board used in hot water home heating. A two way valve to allow hot coolant flow during the winter and bypass on back to the water heater in the summer is all you would need. There is enough coolant flow that you can heat the interior and the water heater in the winter and revert to only hot water it the summer. I recently made something like that out of copper tubing for my JD tractor to keep my feet warm in the winter.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Use of coolant lines for internal heating ??? [message #150980 is a reply to message #150979] |
Tue, 29 November 2011 15:23 |
glacierfl
Messages: 444
Registered: June 2011
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Radiant baseboard, that would work great. So it seems like a feasable project. Does anyone one see a problem with using copper piping instead of rubber hose, would the coolant affect this ????. Would worry about the hose splitting at some point and loosing the engine coolant.
Regards
Steve & Debbie
Monticello, FL
77 Palm Beach :- Aurora
EX G4WDT
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| Re: Use of coolant lines for internal heating ??? [message #150982 is a reply to message #150976] |
Tue, 29 November 2011 15:41 |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
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I seem to remember that JC Whitney used to carry heaters that would tap into a hot water line and came with an electric blower to force air through the heater core. Someone had actually posted pictures of one mounted under one of the dinette seats to provide additional heat.
No reason you can't use the water line, but you should have the restrictor mentioned to keep the water temp in the water heater in a safe range.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: Use of coolant lines for internal heating ??? [message #150983 is a reply to message #150976] |
Tue, 29 November 2011 15:55 |
glacierfl
Messages: 444
Registered: June 2011
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Thanks for the tip on the restrictor to prevent getting scalded.
The reason i thought about copper tubing is the fact its a better conductor than the rubber hose. It's funny how your mind can go crazy thnking about mods ....
The water tank is not far from the back bedroom, perhaps you could warm that area by fitting copper pipes under the fake floor there. Also would help keep the water tank from freezing.
I know that the gas furnace outlet runs along there to keep the water tank warmer, but using the coolant would be free while you are driving.
Regards
Steve & Debbie
Monticello, FL
77 Palm Beach :- Aurora
EX G4WDT
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| Re: Use of coolant lines for internal heating ??? [message #150987 is a reply to message #150983] |
Tue, 29 November 2011 16:07 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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My previous coach had an owner-installed baseboard hot water heater system installed. There were hot water radiator units around the entire perimeter of the passenger compartment of the coach. It was supplied hot water by an additional hot water heater, an Atwood EH-6, that also has the engine hot water loop.
P.O. had a 12v water pump installed on the line to move the hot water. It made a lot of heat on my first trip, in Kansas in July. I was very glad to find and turn off this heat machine.
He had installed in to cope with Denver winters.
I believed that the entire operation took up too much interior space, but did not remove it.
He used copper pipe to route the hot water from each heater, and under the coach. He filled it with anti-freeze, so did not have to deal with winterizing.
Tom Phipps,
MS II
P.S. Yes, the hose split and cost me one 455 engine.
P.P.S. Yes, this was the Bill Harvey coach. He gutted the Avion interior, removed the shower, and seemed to have had a day trip coach in mind. Coach is parts now.
2012 Phoenix Cruiser model 2552
KA4CSG
[Updated on: Thu, 01 December 2011 09:00] Report message to a moderator |
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| Re: Use of coolant lines for internal heating ??? [message #150990 is a reply to message #150976] |
Tue, 29 November 2011 16:33 |
glacierfl
Messages: 444
Registered: June 2011
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Thanks for the info Tom, and sorry about the 455 engine failure ....  , that would be enough to make anyone seriously p*s*ed.
On that issue i am going to get all the hoses replaced, to try and avoid that problem.
Have also thought a little about gauges that would warn of such an event, perhaps some sort of warning buzzer also before it kills the engine....
Sounds like that heating setup is the sort of thing i want to install. Always wondered why more use was not made of using the coolant for heating, perhaps GMC had considered it, but wanted to keep the prices in range. I am looking for ways to improve the way thing work, especially to cut down current/future costs.
I guess it could increase the value of our coaches, should we ever decide to sell, move up in models etc.
Regards
Steve & Debbie
Monticello, FL
77 Palm Beach :- Aurora
EX G4WDT
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| Re: Use of coolant lines for internal heating ??? [message #150998 is a reply to message #150996] |
Tue, 29 November 2011 17:34 |
glacierfl
Messages: 444
Registered: June 2011
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Wally, do you have the model number for that heater. Looks like a good system you have there. I am thinking of running a heater in the bedroom also.... Do you think that the coolant system could manage 4 of those heaters ????.
Regards
Steve & Debbie
Monticello, FL
77 Palm Beach :- Aurora
EX G4WDT
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| Re: [GMCnet] Use of coolant lines for internal heating ??? [message #151003 is a reply to message #150978] |
Tue, 29 November 2011 18:28 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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| emerystora wrote on Tue, 29 November 2011 15:05 |
There is a restrictor in the hose connection at the rear of the passenger head. This would have to be removed if you wanted to run the hose through a heater (other than the water heater). This restrictor is there to keep the flow rate lower to the water heater so that it doesn't overheat the water.
Emery Stora
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I'm not sure if this would apply to a 455 but back in my active Chevy days I was told (don't recall if I read in the FM) that the restrictor in the heater tap at the rear of the head was to prevent too much water flowing through the heater loop. This was to prevent too much of a reduction in flow through the right hand head. So - could this also be true for our 455's?
Also - most household hydronic baseboard heating systems are set to run at 180*.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] Use of coolant lines for internal heating ??? [message #151005 is a reply to message #150976] |
Tue, 29 November 2011 18:33 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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It wold wok quite well - after all, that's how the engine heater works anyway. With one two way (three port) valve and one check valve you could route the coolant through the coach heater radiator in summer and not in winter. My 23' has room beside the water heater to put one or two car heater cores and a fan for them, and this would keep the piping to a foot or so. Were I to find it chilly, that's what I'll do. So far, getting heat out of the coach space has been my problem, but I've not taken it North of here in the winter. Starkille nexty January may change my mind.
--johnny
'76 23' Transmode Norros
'76 Palm Beach
________________________________
From: steve & debbie <zzdebz@yahoo.com>
To: gmclist@temp.gmcnet.org
Sent: Tuesday, November 29, 2011 3:51 PM
Subject: [GMCnet] Use of coolant lines for internal heating ???
Noticed the coolant lines run under the coach to heat the water tank. Could these lines be used for heating the coach internally. Say running them through a shrouded radiator, running along the side of the coach inside ???. Seems like a waste having them external, when in the winter all that heat is wasted.... Wonder if shut off valves could be added also to turn off in the summer ???. One possible use attach to a home oil filled radiator, modified for coolant of course.... , that fits flat on the wall. What do you think, good idea or do i need to tighten up the loose nuts :d
--
Steve & Debbie
Monticello, FL
77 Palm Beach
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Use of coolant lines for internal heating ??? [message #151006 is a reply to message #150976] |
Tue, 29 November 2011 18:37 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
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| glacierfl wrote on Tue, 29 November 2011 14:51 |
Noticed the coolant lines run under the coach to heat the water tank. Could these lines be used for heating the coach internally. Say running them through a shrouded radiator, running along the side of the coach inside ???. Seems like a waste having them external, when in the winter all that heat is wasted.... Wonder if shut off valves could be added also to turn off in the summer ???. One possible use attach to a home oil filled radiator, modified for coolant of course.... , that fits flat on the wall. What do you think, good idea or do i need to tighten up the loose nuts
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I have been giving this a lot of thought lately. I think two related/interconnected systems are needed. One for running down the road that does not have to worry about the heat source or fluid circulation or electrical draw of the system. The other one is to replace the furnace and needs a heat source, a low 12vdc current draw circulation system, and a low 12vdc current draw fan system, unless natural air circulation can be adequate. As I'm still working on getting the beast on the road this has been a back burner thing.
RayE thought an on demand water heater could be used as the non-driving heat source and solar off grid equipment could be a source for a low draw pump. Baseboards would not require fans, but as stated, may take up too much room without creative installation.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: Use of coolant lines for internal heating ??? [message #151008 is a reply to message #150976] |
Tue, 29 November 2011 19:01 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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I think the way to go is to get the rear heat/AC setup from an older Pre 134a Suburban and install that say under the frig so you have rear heat and air. I have a rear Van rear heat/ AC setup here I bought on ebay but they sent the wrong one and its Ford and 134a.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Use of coolant lines for internal heating ??? [message #151009 is a reply to message #150976] |
Tue, 29 November 2011 19:03 |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
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Wish I could use the damn lines to COOL the coach...
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: [GMCnet] Use of coolant lines for internal heating ??? [message #151011 is a reply to message #151006] |
Tue, 29 November 2011 19:13 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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The on - demand heaters are electricity hogs - as will be any system which depends on electric resistance heating. A heat pump system would be more complex and substantially more expensive, but also will be much more efficient as an energy user. The optimum solution would be a means of storing waste engine heat rather than throwing it overboard via the radiator. I'm hauling 40 gallons of fresh water along anyway. If maybe I insulated that tank really well, and heated it with the engine heat while travelling I might get enough heat to put back into the living space when I stop.... I don't mind if all the faucets run hot in the winter......
I'm not cold enough yet to heat and circulate the blackwater.
--johnny
'76 23' Transmode Norris
'76 Palm Beach
________________________________
From: Steve Southworth <midlf@centurytel.net>
To: gmclist@temp.gmcnet.org
Sent: Tuesday, November 29, 2011 7:37 PM
Subject: Re: [GMCnet] Use of coolant lines for internal heating ???
glacierfl wrote on Tue, 29 November 2011 14:51
> Noticed the coolant lines run under the coach to heat the water tank. Could these lines be used for heating the coach internally. Say running them through a shrouded radiator, running along the side of the coach inside ???. Seems like a waste having them external, when in the winter all that heat is wasted.... Wonder if shut off valves could be added also to turn off in the summer ???. One possible use attach to a home oil filled radiator, modified for coolant of course.... , that fits flat on the wall. What do you think, good idea or do i need to tighten up the loose nuts :d
I have been giving this a lot of thought lately. I think two related/interconnected systems are needed. One for running down the road that does not have to worry about the heat source or fluid circulation or electrical draw of the system. The other one is to replace the furnace and needs a heat source, a low 12vdc current draw circulation system, and a low 12vdc current draw fan system, unless natural air circulation can be adequate. As I'm still working on getting the beast on the road this has been a back burner thing.
RayE thought an on demand water heater could be used as the non-driving heat source and solar off grid equipment could be a source for a low draw pump. Baseboards would not require fans, but as stated, may take up too much room without creative installation.
--
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Use of coolant lines for internal heating ??? [message #151016 is a reply to message #151011] |
Tue, 29 November 2011 19:38 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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""The on - demand heaters are electricity hogs - as will be any system which depends on electric resistance heating. A heat pump system would be more complex and substantially more expensive, but also will be much more efficient as an energy user. The optimum solution would be a means of storing waste engine heat rather than throwing it overboard via the radiator. I'm hauling 40 gallons of fresh water along anyway. If maybe I insulated that tank really well, and heated it with the engine heat while travelling I might get enough heat to put back into the living space when I stop.... I don't mind if all the faucets run hot in the winter......
I'm not cold enough yet to heat and circulate the blackwater.
--johnny
"" Years ago, you could buy propane or gasoline powered engine heaters. A GMC friend hooked a propane unit to a baseboard system in his GMC using a low wattage circulation pump. It worked very well and the intent was to reduce the high draw of the conventional furnace blower.""
Bob de Kruyff
78 Eleganza
Chandler, AZ
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