Explore the collection of HVAC gas conversion kits at Stockpile Express. A conversion kit changes a furnace or another appliance that runs on propane to natural gas or vice versa. You might want to make these kinds of conversions to save costs and improve appliance efficiency. To streamline your search, use our helpful filters to sort available HVAC gas and propane conversion kits by size and product type. Browse quality HVAC gas conversion kits from trusted makers, including Modine, Rinnai, and Thermo Pride, to find the right fit for an existing system.