The maintenance and safety check requirements generally apply to any gas fittings or flue installed in the "relevant premises" except: Any appliance owned by the tenant Flues/chimneys solely connected to an appliance owned by the tenant.
Any gas appliances (such as gas fires provided for customers in non-residential areas of public houses) that are exclusively used in a part of the premises occupied for non-residential purposes.
Please note that any appliances and flues serving "relevant premises" (such as heating boilers not installed in tenants' accommodation but used to heat a number of premises) are covered. The duty to maintain and arrange safety checks also applies to portable appliances such as LPG cabinet heaters.