What is the recommended method for securing insulated ductwork?

The recommended method for securing insulated ductwork is to seal with foil tape. This choice is appropriate because foil tape is designed specifically for use in HVAC systems. It adheres well to the surface of ductwork and provides an effective air seal, preventing air leakage, which is critical for maintaining system efficiency.

Foil tape also has a strong resistance to temperature fluctuations and moisture, making it ideal for insulated ducts where thermal performance and durability are essential. Its construction allows it to conform to smooth surfaces, ensuring a tight bond that helps maintain the integrity of the insulation.

While other methods like using metal straps or all-purpose adhesive may be effective in certain contexts, they may not provide the same level of sealing capability or durability as foil tape in HVAC applications. Plastic clamps could also be used but are not as effective in providing a continuous seal that minimizes energy loss. Thus, the use of foil tape is the best practice for securing insulated ductwork effectively and efficiently.