Final answer:
The ductwork of an HVAC system running through unconditioned spaces must be insulated and properly sealed to maintain system efficiency and improve air quality. Various materials can be used for this purpose and professional installation is recommended.
Step-by-step explanation:
When ducts of the HVAC system run through unconditioned spaces in a house, such as a crawlspace or attic, then the ductwork should be insulated. This is to ensure that the air traveling through the ducts does not lose its intended temperature, be it warm or cool. Insulating ductwork helps to maintain the efficiency of the heating, ventilation, and air conditioning (HVAC) system by reducing energy losses. Additionally, it's important that the ductwork is sealed properly to prevent air leaks which can lead to energy wastage and compromise the system's performance.
There are various materials used for insulating ductwork, which include fiberglass, foam board, and reflective insulation. Each of these materials has its own advantages and is suited for different applications and climates. The installation process of insulation should be handled with care, ensuring there are no gaps or compressed areas as these can decrease its effectiveness.
Moreover, a well-insulated and sealed duct system can improve air quality by reducing the chances of dust and pollutants entering the system. To maintain optimal performance and efficiency of your HVAC system, it's recommended to have regular inspections and maintenance of the insulation and sealant used on the ductwork. Professional installation and maintenance is essential to ensure that the system is working at its best and to prevent any long-term damage or higher energy costs.