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Changing lp heater to use natural gas

I have been told that you can change a heater to accept natural gasby changing an orifice . is this true?

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Yes. the orifice has a tiny hole in it.It is located at the tip of the pilot before the flame, and at the tip of the injectors. Natural gas and propane molecules are different sizes in the vapor state. The orifice regulates how much vapor comes out. You need to change the orifice in the pilot and the burner injectors for it to work properly. If you don't you will get a very large flame or a very small one, depending which way convert from. If you have the papers from the company that made the heater, they should be able to help you changer over. You also may need to make some adjustment if you are at high altitude, 2,000' or more, as the air is thinner (less oxygen) so the regulator needs to be set to higher volume.

Posted on Mar 10, 2008

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Model# BWH30NLTB


Unit goes under sure heat name also.
My unit emitted unburnt gas smell the minute pilot started,
and was annoying during burner operation.
I discovered they built unit with primary pilot that had 2 ports.
They used LP and sealed off natural gas,instead turning lp/nat
knob on back activates second pilot for natural gas use.
This means natural gas goes thru LP pilot orifice and burns
slightly off during normal natural gas use(by design).
The unused natural gas orifice has 1 air mix hole and the LP orifice
has 2 air mix holes.
I carefully plugged 1 of the holes in the LP orifice and suddenly
pilot gas flame seated correctly on orifice port.Gone was the
unburnt odor of natural gas.
The typical flame in a flame appearance now was exhibited by
the small pilot,secondary pilot remained consistent with manual
picture.
Of course, to use with LP I would have to open blocked air mix
hole in addition to the other changes per manual.
Hope this helps someone with similar condition.

Dec 31, 2012 | Reddy Heating & Cooling

1 Answer

Flames coming out of top and going into flue pipe


Did you change the orifice and regulator from Natural Gas to LP Gas? IF not, that's the problem.

Dec 27, 2012 | Heating & Cooling

1 Answer

Can they be changed from lp to natural ga


Simply put, NO! It is totally unsafe to try to convert it from one gas type to another. There's a lot more to it than just changing the orifice as some may tell you. If DESA International had intended it to be convertible, they would have have provided a kit for it.

Jan 31, 2011 | Desa International CGCFTP Compact Heater

1 Answer

We like to convirt LP Water Heater to Natural Gas Water Heater, PG & E told us to replace pilot burner orifice. My question is , 1- is it possiable to do that? 2- If it is What is the part number...


yasharer,

Yes it is possible to convert any gas appliance to natural gas or from natural gas to LP. The only difference is the size of the orifice used in the burner. I have a tip at http://www.fixya.com/support/r7207798-changing_gas_appliance_from_natural_gas which explains everything you will need to know to get the part and change it out.

Thanks for using FixYa and for the great rating.

hardrocko

Dec 10, 2010 | Heating & Cooling

1 Answer

Empire Mod#UH-1250-1FSP Ser # K49789WR Heater has been switched from LP gas to natural gas. I need proper orifice size to complete.


need to notify empire their specs for their natural gas should have the answer the kit or conversion unit should have had the part -it might not need to be changed--but if it does info needed is size of heater btu's size of line what kit/gas valve unit ur using

Jan 25, 2010 | Empire Heating & Cooling

1 Answer

Can the Dayton model 3e368e be converted to use


If you know a dealer or repair company,they can order orifices to change out in the unit.

Oct 17, 2009 | Dayton (3E386) Heater

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Laars Lite 2 Coversion to LP Gas


Hi you will need a gas fitter to do this and set it up

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1 Answer

Convert from lp to natural gas


you need to go to the manuel and check if you can retrofit the heater to natural gas. there is a difference in the ORIFICE size. or check to see if there is a phone number to the manufacture and talk to them. THE BEST THING FOR YOU TO DO IS TO GET A CERTIFIED A/C PERSON TO DO IT, IT IS VERY DANGEROUS IF YOU GET THE WRONG ORIFICE SIZE !

Jan 05, 2009 | Dyna-Glo D-E37 Wall Mounted Panel Heater

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