Final answer:
The HVAC maintenance service would include air leakage location identification to improve the system's efficiency by sealing leaks. In plumbing, air-filled tubes near faucets act as water hammer arrestors to prevent loud noises and pipe damage when water flow is abruptly stopped.
Step-by-step explanation:
The service that could include the air leakage location identification procedure is c) HVAC maintenance. The purpose of this procedure is to ensure optimal efficiency and performance of a home's heating, ventilation, and air conditioning (HVAC) system. Air leakage from ducts or around windows and doors can lead to energy loss, making it much more expensive to heat or cool the home. During an HVAC maintenance visit, a technician may use equipment to detect where air is escaping from your HVAC system and then seal those leaks, which can result in improved energy efficiency and comfort.
As for the plumbing reference, air-filled tubes near water faucets are also known as air chambers or water hammer arrestors, which prevent water hammers. A water hammer is a loud thumping noise that can happen when water flow is suddenly shut off by a faucet or valve, causing a shockwave through the pipes. The air-filled tube acts as a cushion to absorb the shock, reducing the noise and protecting the plumbing system from potential damage caused by the pressure waves.