Malcolm,
Geat input!
Can you enlighten us as to where CO comes into play in your formulas?
And is part of the burn product an acidic?
Thanks
Bill
90 Westy Syncro
Lake Tahoe

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> From: Malcolm Holser <mholser@Adobe.COM>
> To: davidson <davidson@SIERRA.NET>; vanagon@VANAGON.COM
> Subject: Re: Catalytic Heaters.
> Date: Thursday, November 05, 1998 1:51 PM
>
> At 03:47 PM 11/3/98 , davidson wrote:
> >I don't understand. Can you explain how this can be so? How does an
> >unvented catalytic heater (vented with windows open a crack) create more
> >water vapor in the van than a vented heater? They are both creating
heat,
> >they both have air intake from outside and air exhaust to the outside?
Have
> >you measured this?
> >Bill
> >90 Westy Syncro
> >Lake Tahoe
>
> The "exhaust" from a hydrocarbon fuel is mainly water vapor -- steam.
Propane
> is C3H8 (I think) and so C3H8 + 7 O2 -> 3 CO2 + 4 H2O.  Unvented heaters
> dump the CO2 and the H2O into the inside of the bus -- lots of H2O.
Vented
> heaters dump it out their exhaust pipes.
>
> This is the steam you see from your exhaust pipe one those cool
high-dew-point
> autumn days as well -- and the water dripping from your tailpipe --
gasoline
> is also hydrocarbons, and so produces lots of water when burned.
>
> In your camper, the propane stove does the same thing -- think of the
flames
> you see as hot carbon dioxide and steam -- mostly steam!
>
> Malcolm H.
>