Nate Core Practice Test

Duct insulation is primarily designed to reduce heat loss or gain and improve the efficiency of HVAC systems. Fiberglass and foam insulation are the most common materials used due to their excellent thermal resistance properties.

Fiberglass insulation consists of tiny glass fibers that trap air, creating an effective barrier to heat flow. It is lightweight, cost-effective, and resistant to moisture, making it ideal for duct applications. Foam insulation, on the other hand, offers superior insulation values and can effectively fill gaps and crevices, providing an air-tight seal that enhances energy efficiency.

These materials help maintain temperature control within the ductwork, contributing not only to energy savings but also to improved comfort in indoor environments. Using alternative materials like wood, metal, or aluminum foil does not provide the same level of thermal insulation, thereby making them less effective options for duct insulation.