Catalytic Heaters - Page 2 - Fiberglass RV


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Old 08-24-2014, 11:54 AM   #15
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Steve, to be honest, when I am going to sleep with my propane furnace running, I still open the window next to my head....call it paranoia but better then waking up dead
Derek ,We do the same and open the roof vent and a window a little ways even though our furnace is vented . The problem I see is that carbon monoxide weighs about the same as fresh air and just opening the roof vent still allows monoxide to build up in the trailer . There is a reason monoxide detectors are placed close to the floor and smoke detectors are paced on the ceiling or high on a wall. Relying on the low oxygen sensor to save your life IMHO is a risky gamble.
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Old 08-24-2014, 01:01 PM   #16
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Before installing any propane devices not installed by the manufacturer you might want to read what RVIA has to say. LINK
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Old 08-24-2014, 08:05 PM   #17
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That RVIA page pretty much sez it all:
Fuel burning appliances must be listed for RV use and labeled by a nationally recognized testing agency that has found the product to be suitable for its intended use.
Sealed combustion and direct venting to the outside is required for all propane appliances, except for gas ranges, to provide for a complete separation of the combustion chamber from the interior atmosphere.
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Old 08-26-2014, 11:01 AM   #18
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I wonder if the fact that a catalytic heater technically is not a combustion appliance affects how the regulations apply to them.
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Old 08-26-2014, 11:09 AM   #19
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Originally Posted by David Tilston View Post
I wonder if the fact that a catalytic heater technically is not a combustion appliance affects how the regulations apply to them.

com·bus·tion
kəmˈbəsCHən/
noun
noun: combustion
  1. the process of burning something.
    "the combustion of fossil fuels"
    synonyms:burning; Morekindling, ignition
    "the combustion of fossil fuels"




    • Chemistry
      rapid chemical combination of a substance with oxygen, involving the production of heat and light.






Origin
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Old 08-26-2014, 11:14 AM   #20
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Byron, I am not sure what you are trying to get at, but I suspect that you disagree with my last statement.

The reason it is not "combustion" is that it happens at a much lower temperature, below ignition temperature. This is why a catalytic heater is allowed in a class 1 div 1 hazardous area. It can't start a fire, therefor it is not combustion.
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Old 08-26-2014, 11:16 AM   #21
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Originally Posted by David Tilston View Post
Byron, I am not sure what you are trying to get at, but I suspect that you disagree with my last statement.

The reason it is not "combustion" is that it happens at a much lower temperature, below ignition temperature. This is why a catalytic heater is allowed in a class 1 div 1 hazardous area. It can't start a fire, therefor it is not combustion.
READ definition #2....
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Old 08-26-2014, 11:16 AM   #22
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Correct me if I'm wrong but the RIVA is a voluntary association of manufactures. Not a legal code. Not to say it is not an important piece of information to consider just that it does not go to the legal aspect of installation.
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Old 08-26-2014, 11:18 AM   #23
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Description of how catalytic heaters work..

Pay close attention to the By Products section.
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Old 08-26-2014, 11:19 AM   #24
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Correct me if I'm wrong but the RIVA is a voluntary association of manufactures. Not a legal code. Not to say it is not an important piece of information to consider just that it does not go to the legal aspect of installation.

You're correct until the lawyers get a hold of it. Then look out.
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Old 08-26-2014, 11:41 AM   #25
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A fairly good explanation can be found here:
Gas Catalytic Heater Operation - Vulcan Catalytic Systems

While this can be called combustion, it is very different than an open flame.
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