As a landlord, you have a legal obligation to produce a valid gas safety inspection certificate to your tenants. As well as this responsibility, it’s also a good idea to ensure that you have an annual boiler service done – this will help your tenants to get the best from their heating while also potentially saving you money; if you don’t look after your boiler, it’s likely to need replacing much quicker than it would otherwise. 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.