What should the HVAC ductwork that runs through unconditioned spaces be?

The HVAC ductwork that runs through unconditioned spaces should be insulated to prevent heat loss or gain as the air moves through the ducts. Unconditioned spaces, such as attics or crawl spaces, can experience significant temperature fluctuations, which can negatively impact the efficiency of the HVAC system. Insulation minimizes these changes in temperature, helping to maintain the intended temperature of the air being delivered to living spaces. This not only improves energy efficiency but also ensures better comfort levels within the conditioned spaces of the home.

Choosing insulation for ductwork in unconditioned areas is essential for preventing issues such as condensation, which can lead to mold and structural damage. Additionally, insulated ductwork can help lower energy bills by reducing the workload on the heating and cooling systems, ensuring that they operate more efficiently.