Proper ventilation is one of the key requirements of large industries and production plants. This is because the continuous operation of machinery and the big number of workers make it necessary to circulate fresh air in the facility without fail. This is why industries create ventilation systems that ensure a regular supply of fresh air and removal of spent air from the unit. For a smooth functioning, regular maintenance of these ventilation units is required, and this is where the role of a boiler engineer Sussex comes into the picture. Let us look at some reasons that necessitate visitation and services of these engineers in an industry.