Which factor contributes most to proper installation of insulation in ducts?

The proper installation of insulation in ducts is crucial for ensuring energy efficiency, temperature control, and system longevity. Adhesive quality plays a significant role because it affects how well the insulation adheres to the duct surface. A strong adhesive ensures that the insulation remains in place, reduces the risk of air leaks, and prevents loss of thermal efficiency. If the adhesive is subpar, the insulation may detach over time, leading to gaps that can significantly compromise the performance of the HVAC system.

While other factors, such as material thickness and duct configuration, are important for insulating effectiveness, they do not address the immediate concern of how the insulation is secured to the duct. Mechanical fasteners also contribute to the stability of the insulation, but their effectiveness is contingent on having a quality adhesive to hold the insulation firmly in place. Therefore, while all factors are relevant, the quality of the adhesive is particularly critical in ensuring that insulation performs effectively as intended.