Gas training courses are open to nearly anyone. A usual student may be somebody that is already working with a friend in the gas or plumbing type of industry. Or may perhaps be someone looking for a change in career and do not have any previous experience. No matter who you are, everyone should be capable of finishing at least one of our gas courses which will help you to obtain a gas certification. 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.