HVAC systems can be used in both domestic and commercial environments. HVAC systems can provide ventilation, and maintain pressure relationships between spaces.
Plumbing is considered the system in which clean water enters your property and any issue relating to your property's internal pipes. Conversely, drainage is the system through which wastewater is taken away from your property.
Power system control refers to keeping a desired performance and stabilizing power system following various disturbances, such as short circuits and loss of generation and/or load.