Because of its very low combustion value, artificial gas requires multiple use costs to produce the same amount of heat, so it is not suitable as a gas source for fireplaces. There has never been a factory in Europe and America. Natural gas and liquefied gas fireplaces have low operating costs and are hygienic and convenient. Natural gas and liquefied petroleum gas can be easily interchanged. Naturally balanced gas fireplaces have the highest safety / thermal efficiency / applicability and best decorative effects, and have become widely used in ordinary apartments and non-single building.