Date:         Thu, 31 Jan 2008 00:52:13 -0500
Reply-To:     Mike Collum <collum@VERIZON.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Mike Collum <collum@VERIZON.NET>
Subject:      Re: Propex and outside temperature
Comments: To: Richard A Jones <jones@COLORADO.EDU>
In-Reply-To:  <47A14990.8090609@colorado.edu>
Content-type: text/plain; charset=ISO-8859-1; format=flowed

Thanks Richard.

I understand the propex works better if the pressure is changed to 14"
and, for that reason among others, I will probably put a dedicated tank
and regulator on the passenger side.

Mike



Richard A Jones wrote:
>> How low can the outside temperature go (outside westy propane tank) and
>> a propex furnace, at or near sea level, still operate?
>
> Propane freezes at -304 degrees F, so don't worry.  ;-)
>
> Actually, what matters is its boiling point, since you need it
> to go from liquid to gas to run your furnace.  That is -43 F.
>
> The Vanagon propane tanks have a two stage regulator to better
> control pressure in cold temps.  If there is moisture in the
> propane, it can freeze when the pressure is reduced.  A two
> stage regulator is better at producing an even, desired pressure
> in cold weather than a single stage.  BBQs don't care....
>
> I have a Carver P4.  The lowest temp that I have started it
> at is 23 degrees F.  Because it expects higher pressure than
> we use here in the US, it takes a few tries to start at cold
> temps.  Maybe 4, a few times 6.  The Propex is probably
> similar unless it has an orifice sized for 11" of water,
> NA propane pressure standard.  (British standard pressure
> equals about 15" of water.  See http://jones.colorado.edu/jones/PropaneFacts
>
> Richard
>