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How to select the right duct tape for air conditioning ?

Posted on July 12th, 2023

Central air conditioner ducts are often routed through unconditioned zones in the building. Metal duct conveying cool, conditioned air through a broiling attic in summer or warm air through a chilly crawl space in winter may lose a substantial amount of temperature. On average the air ducts leak around 20% to 30% of the air conditioned or heated air. These losses can be reduced by insulating metal ductwork with wrap-around insulation. In order to help improve efficiency, it’s important to seal all of the air ducts joints with Air conditioner tapes.

With dozens of options in HVAC tapes, determining which one is right for your job is critical. Selecting the right aluminum foil duct tape for air conditioning unit involves considering several key factors:

Aluminum Foil Duct Tape for Air Conditioning

1. Aluminum Foil Backing

The first consideration in tape selection is backing. Most Air conditioner ductwork applications necessitate a tape with a pure foil or laminated foil backing, although there are some reinforced Aluminum foil tapes which are robust enough to be used in Air conditioner ductwork applications. 

If the pure aluminum foil is strength large enough, increase the thickness of the aluminum foil, so that the cost is very expensive. We usually use reinforced aluminum foil to increase its tensile strength but not much production costs. Reinforced aluminum foil tape include FSK tape, Aluminum foil glass cloth tape, Foil scrim tape, PET laminated foil tape.

2. Adhesive layer

The second consideration in tape selection is Adhesive layer.
Synthetic rubber resin adhesive is synthetic rubber adhesive systems. The synthetic rubber adhesive alone does not posse any adhesive properties, and must be combined with tackifier resins to create a PSA.  Also named Hot melt adhesive. It will be offer good tack and adhesion to a variety of surfaces, but will not perform well in colder temperatures.

3. Material Compatibility

Match the tape to the surface you'll be applying it to. For metal ductwork, a high-bonding aluminum foil tape with good adhesion is ideal. For fabric ductwork, a cloth-backed aluminum foil tape with better flexibility and breathability is recommended.

4. Heat resistance

Ensure that the aluminum foil tape can withstand the high temperatures generated by the air conditioning system. Opt for tapes rated for high temperatures, typically around 180°F (82°C) or higher.

5. Waterproofing

Since condensation can occur around AC units, it's important for the aluminum foil tape to be waterproof to handle potential moisture within the air conditioning system, ensuring that the tape retains its adhesive properties in damp conditions. Silicone-based aluminum foil tapes excel in this area.

6. Durability

Choose a durable aluminum foil tape that can maintain its adhesive properties over time and is resistant to tearing and to withstand accidental snags or wear and tear., ensuring the sealing performance of the air conditioning system.

7. Size and width

Select the appropriate size and width of the aluminum foil tape to ensure complete coverage and sealing of the interfaces and connections within the air conditioning system.

Remember, the best aluminum foil duct tape for air conditioning unit depends on your specific needs and application. By considering the factors mentioned above, you can choose a reliable and effective tape to maintain optimal air conditioning performance.

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