Check what type of gas is connected to your house before you plug a heater into it. As there is no standard or requirement that restricts whether Natural gas or LPG is connected to those ports. LPG has a way higher heat value than Natural gas. So the 2 gases are definitely not compatible. If you plug a LPG heater into natural gas it simply won't work. But if you plug a natural gas heater into LPG, you will get big yellow smoky flames, lots of carbon monoxide, and you might destroy the heater. It's like having 1 type of power socket that could be supplying either 110V or 240V.