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Dick Wiegand
 
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tgodiver wrote:

> what happens when you use the same jets as before?
>
> Xanath > wrote in message
> ...
> >


The reason you have to change the orifice (which meters/limits the gas flow)
is due to the fact that propane has a higher BTU value (available heat) than
natural gas. If you don't change the orifice, you will limit the burner
(starve) and effectively derate the BTU rating (heat output).

Two things in gas flow to remember. Propane and natural gas both have
regulators to reduce the pressure coming from the tank or street
respectively. When a gas applicance is designed, the metering of the fuel is
jetted (i.e. diameter of the orifice) to achieve the design BTU output at a
given fuel supply pressure.

All adjustment from that point on is done with the air shutter (found on all
gas burning devices, to control the air/fuel mixture to ensure proper
balance, and optimum fuel use.

Most propane distributors, or you local supplier of natural gas should be
able to provide help, or let you know who has what you need in your area.

Dick