Does converting a fireplace between natural gas and propane void the manufacturer's warranty?
No — converting a fireplace between natural gas and propane does not void the warranty, as long as it's done with the manufacturer's own conversion kit and installed by a licensed gas pro. What voids coverage is an uncertified kit, a homemade orifice swap, or a DIY conversion. Do it by the book and the warranty stays intact.
Manufacturers build conversion in on purpose
Every major brand we carry — Napoleon, Heat & Glo, Kozy Heat, Valor, Mendota, Majestic — engineers most of its gas units to run on either fuel and sells a listed conversion kit to match. Most units ship set for one fuel with the kit for the other available by model number. Using that kit, following that unit's own instructions, keeps you squarely inside the warranty. The limited lifetime coverage assumes the appliance is set up to spec, and a factory kit installed correctly is 'to spec.' That's the whole reason the kit exists.
Where warranties actually get voided
Coverage disappears when someone improvises. Drilling out an orifice instead of replacing it, using a generic kit off a shelf that isn't listed for your model, or a homeowner doing the swap themselves — those are the moves that hand the manufacturer a reason to deny a claim. In North Carolina it's also illegal: connecting or altering the fuel side is licensed gas work, and a warranty claim after an unpermitted DIY conversion is a claim you'll lose twice. We pull the parts sticker, order the correct kit, convert to the printed manifold pressure, and leave the paperwork with you.
What we hand you afterward
Every conversion we run gets the correct orifices, the right regulator or pressure setting for propane, a leak and pressure test, and a rating-plate update so the label matches the fuel in the line. That last detail matters — an inspector or a future buyer's home inspector checks that the plate and the fuel agree. You keep the manufacturer's warranty plus our own workmanship guarantee. If you're weighing a conversion, call (828) 545-0525 for a free assessment.
Related questions
- Can I convert my natural gas fireplace to propane?
- Can I do a gas fireplace fuel conversion myself, or does it need a pro?
- What parts get changed when a fireplace is converted from one gas to the other?
- Do I need a conversion kit specific to my fireplace's brand and model?
- Are all gas fireplaces convertible between natural gas and propane?
- How do I know if my house has natural gas or propane?
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