HVAC stands for Heating, Ventilating and Air Conditioning. This is one of many specialist areas in the construction industry.
Glossary
Heavy Commercial Vehicle
Although the exact definition may vary slightly from region to region, heavy commercial vehicles are those trucks, vans, and pickups with an allowed gross vehicle weight (GVW) above a certain weight. For example, to meet this description in Europe the maximum total weight of the vehicle and its full permitted load will exceed 3.5 tonnes.