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05-26-2020, 04:02 PM
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#1
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New Member
Join Date: Apr 2020
Posts: 2
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Propane heater mounting location?
Hello! My partner and I are doing a few revisions on our original plan for our skoolie ('93 Bluebird 33') and the issue of evenly heating the main spaces has come up. The original plan calls for a small wood stove in the back of the bus (bathroom area), but our living area up front is likely not to benefit much from the limited amount of heat it's going to be able to output when figuring walls and such. The revised living room plan calls for a small, non-electric heater for the space. We'd like to do a vented propane heater on the passenger side near the front door.
The only issue is that the fuel tank is mounted on that side. There is 2˝" of insulation over the floor pan (total of R15 value) and about an inch and a half of air gap between the tank and the floor. Is it feasible or safe to use a propane heater above the fuel tank given this information?
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05-26-2020, 04:06 PM
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#2
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Bus Geek
Join Date: Sep 2018
Posts: 2,831
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
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The tank should be 3 feet from an ignition source according to NFPA 1192
I’ve taken this literally even though there is a floor between my tank and stove and heater. I am *just* meeting that requirement.
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05-26-2020, 07:38 PM
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#3
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Bus Geek
Join Date: Apr 2012
Location: So Cal
Posts: 3,231
Year: 1935
Coachwork: Superior
Chassis: Chevy
Engine: 317 ci/tid / Isuzu
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Danjo, I agree that NFPA codes are better than none and generally make sense. However, NFPA has no government jurisdiction and no law making ability--it is like RIVA in that respect and may or may not have the best interests of the consumer entirely at the forefront of its codes. I just don't know. In the OP's scenario it would seem to me at least that the separation of his propane heater and his diesel tank should be sufficient especially with the steel floor and air space between. If it were gasoline I'd feel differently. That's just my opinion and as we all know, opinions are like "adam henrys" everyone has one.
Jack
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05-26-2020, 07:49 PM
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#4
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Bus Geek
Join Date: Sep 2018
Posts: 2,831
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
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Quote:
Originally Posted by ol trunt
Danjo, I agree that NFPA codes are better than none and generally make sense. However, NFPA has no government jurisdiction and no law making ability--it is like RIVA in that respect and may or may not have the best interests of the consumer entirely at the forefront of its codes. I just don't know. In the OP's scenario it would seem to me at least that the separation of his propane heater and his diesel tank should be sufficient especially with the steel floor and air space between. If it were gasoline I'd feel differently. That's just my opinion and as we all know, opinions are like "adam henrys" everyone has one.
Jack
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You mean the same organization that writes the NEC? I’ve heard this argument before, but I like to be able to say that I followed someone’s code.
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05-26-2020, 07:54 PM
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#5
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Bus Geek
Join Date: Apr 2012
Location: So Cal
Posts: 3,231
Year: 1935
Coachwork: Superior
Chassis: Chevy
Engine: 317 ci/tid / Isuzu
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Yup! Ya pays ya money an ya takes ya chances!
Jack
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05-26-2020, 08:05 PM
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#6
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Mini-Skoolie
Join Date: Dec 2018
Location: Tucson, AZ
Posts: 52
Year: 1991
Chassis: Wayne Lifeguard
Engine: 7.3L IDI
Rated Cap: 23,600 lb
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Quote:
Originally Posted by Danjo
The tank should be 3 feet from an ignition source according to NFPA 1192
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Can you point me to where it refers to that, Danjo? I'm planning to put my propane heater directly above my propane tank (separated by the steel and wood floor) but if the NFPA says that's a no-no then I'll think through how to do it some other way.
In a brief perusal of NFPA 1192 just now I see that the air inlets and flue gas outlets must be 3 feet away from a gasoline filler spout (NFPA 1192, 2018 edition: 5.5.3.1, 5.5.3.2) but nothing about the appliance itself.
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05-26-2020, 11:45 PM
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#7
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Bus Geek
Join Date: Sep 2018
Posts: 2,831
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
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Well, maybe I’m interpreting it for my configuration. It has to do with pressure relief valves, which in my case is on my tank.
NFPA 1192, 5.2.19.1 Discharge from Propane Container Pressure Relief Valves.
I apologize. It does not apply to your situation I don’t think unless you have an intake or exhaust vent there.
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05-27-2020, 10:10 AM
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#8
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Mini-Skoolie
Join Date: Dec 2018
Location: Tucson, AZ
Posts: 52
Year: 1991
Chassis: Wayne Lifeguard
Engine: 7.3L IDI
Rated Cap: 23,600 lb
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Thanks! I had skipped over that paragraph but it bears reading again. The workgroups of the NFPA have given these things way more thought than I ever could. It just makes sense that I follow their recommendations. Thanks again for the reference!
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05-27-2020, 11:28 AM
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#9
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Bus Geek
Join Date: Sep 2018
Posts: 2,831
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
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Did you see that you can ask code questions there too?
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05-27-2020, 11:31 AM
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#10
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Bus Geek
Join Date: Sep 2018
Posts: 2,831
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
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In my case, I had missed that relief valve stuff too and decided to relocate the propane to the passenger side.
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05-27-2020, 11:36 AM
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#11
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Mini-Skoolie
Join Date: Dec 2018
Location: Tucson, AZ
Posts: 52
Year: 1991
Chassis: Wayne Lifeguard
Engine: 7.3L IDI
Rated Cap: 23,600 lb
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Quote:
Originally Posted by Danjo
Did you see that you can ask code questions there too?
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I did not see that you can ask questions there. That's great!
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05-27-2020, 12:18 PM
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#12
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Bus Nut
Join Date: Jan 2020
Location: Wild Wild West
Posts: 691
Year: 1999
Coachwork: Blue Bird
Chassis: TC RE
Engine: 8.3 Cummins MD3060
Rated Cap: 84
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I guess I read a different problem into this original question. I don't think I would be worried about the placement of the heater with all the layers between the heater and fuel tank. What would worry me is this is a vented heater near the filler for the fuel. Does this not pose a potentially explosive problem? If he is using the typical style RV propane furnace, the fresh air intake and exhaust come right out the side and within a few inches of the fuel being pumped into the tank. Absolute no-go if that is the case.
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05-27-2020, 12:22 PM
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#13
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New Member
Join Date: Apr 2020
Posts: 2
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This isn't going to be a typical RV propane furnace; the vent and intake are going to be routed from above the heater, through a panel where a window would have been otherwise. It should be more than three feet above the filler inlet for the fuel tank.
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05-27-2020, 12:28 PM
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#14
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Bus Nut
Join Date: Jan 2020
Location: Wild Wild West
Posts: 691
Year: 1999
Coachwork: Blue Bird
Chassis: TC RE
Engine: 8.3 Cummins MD3060
Rated Cap: 84
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Quote:
Originally Posted by Joshua53315
This isn't going to be a typical RV propane furnace; the vent and intake are going to be routed from above the heater, through a panel where a window would have been otherwise. It should be more than three feet above the filler inlet for the fuel tank.
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Gasoline, or diesel? If it's gas, I wouldn't put it anywhere near the fuel filler. Maybe out the roof, but I would still try to locate it to the other side of the bus. Roman candles are cool, but not if I'm the Roman!! Diesel isn't nearly as volatile, but I would still think about locating it on the other side, or out the roof, if possible.
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