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. As with most modern conveniences, the luxury of modern day air conditioning arises from the demands of past commercial requirements. It’s not a terminator of people, but rather a terminator of rising energy costs. In the pre-1960s, the acquisition of retail, industrial or commercial air conditioning equipment involved a serious balance between expense and the practical relationship between the goods or services being delivered.