When you choose to let out your home, there are various things that you have to do before it is suitable to let out. These include getting the home in a good condition, working out how you will accept rent and there are also various certificates that you will need for legal reasons. It is not just as simple as finding tenants, moving them in and collecting the rent. 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.