Energy Performance Certificates or EPCs are a compulsory requirement for all homes on the property market, this includes rental properties and, by law, a landlord is required to provide his tenants with an EPC when they move into the property in question. As of the 6th of April, new legislation require property owners to have an EPC in place within 7 days of marketing their property. At the end of 2014, R-22 refrigerant will be banned under EU legislation. So air conditioner systems with R-22 gas will effectively become redundant as any loss of gas cannot be replaced. It is estimated that there are still millions of R-22 systems still in operation, but the main reason for businesses delaying implementation of R-22 replacement systems is, putting it simply, the expense.