All of the following are control methods for HVAC systems except D. Vacuum
What is the HVAC systems?Cables, hardware, and hydrodynamics are all commonly utilized control strategies for HVAC (warming, ventilation, and discuss conditioning) frameworks. Cables can be utilized to associate sensors and actuators to a control board, whereas hardware can incorporate chip and advanced controllers that mechanize HVAC frameworks.
Therefore, Power through pressure can be utilized to control the stream of liquids in heating and cooling frameworks. In any case, vacuum isn't a control strategy utilized in HVAC frameworks.
Learn more about HVAC systems from
https://brainly.com/question/23989909
#SPJ1