Lenore's HVAC is putting in a system in a two-family residence. The control system being used is common, and will consist of a sensor, controller, controlled device, and A) an energy source. B) a chiller. C) insulated ducts. D) vents.

In HVAC systems, especially in a two-family residence, having a proper energy source is crucial for the system to function efficiently. The energy source can vary, including electricity, natural gas, or even renewable options like solar energy. Each energy source impacts efficiency, cost, and environmental footprint, so choosing the right one is key! When designing the HVAC setup, don't overlook the importance of insulated ducts. Proper insulation helps prevent heat loss or gain as air travels through the ductwork, maintaining desired temperatures in each unit. This not only enhances comfort but also improves energy efficiency, making it a win-win for residents and their utility bills!