In 1996 it became a legal requirement for Landlords to ensure that any rental property has a Landlord Gas Safety Certificate carried out annually, on all gas appliances. Landlords must ensure that all gas appliances and flues fitted in any property have an annual landlord gas safety check by a gas safe registered engineer. What is a home energy efficiency report? A home energy report is a summary of the energy that is spent annually in your home, targeting the top major energy expenditures, including air-conditioning, windows, doors, and the installation or quality of electrical units which use the most energy. The purpose of an energy efficiency report is to determine the best avenues for saving money in the long term and what steps should be taken in the short term in order to prevent energy loss.