Mechanical noise control refers to strategies used to reduce unwanted noise generated by moving machinery and equipment, like HVAC systems, plumbing, and elevators to reduce impacts from the equipment on the occupants. Residential, commercial, and industrial spaces benefit from mechanical noise control engineering. For residential, proper design of HVAC, plumbing, and other equipment improve the quality of the sound environment. Similarly for commercial spaces, larger equipment is often deployed to heat and cool offices, retail, and other commercial spaces. Finally, industrial facilities may require noise analysis and control efforts to comply with property line noise limits in a local noise ordinance.