HVAC DIY Tips & Tricks

Quick Guide to Duct Insulation

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- By Jim Dill

Make sure you're using the proper insulation for your needs! Learn about options such as fiberglass, aluminum foil, and  XLPE. Discover the pros and cons of each insulation material and maximize your home's energy efficiency.

The Different Types of Insulation

Duct insulation can be made from various materials and come in many shapes and sizes. Common types include fiberglass, aluminum foil, rockwool, and XLPE.

Fiberglass and Aluminum Foil Insulation

Fiberglass is the part that insulates. It is held together by the foil backing. This type is commonly used on round or square duct plenums, and branch runs.

Rockwool Insulation

Rockwool is a brand of insulation with the added benefit of soundproofing. It is a very durable, making it the right choice to insulate HVAC ductwork.

Cross-linked Polyethylene Foam Insulation

Known as XLPE, it is excellent for insulating metal ducts exposed to the outdoors. It is weather resistant, and its flexibility allows it to bend easily.

Reasons For Insulating HVAC Ductwork

The benefits of an insulated system include improved indoor air quality, which leads to a quieter, more efficient HVAC system, and a reduction in utility bills.

Inspecting Duct Insulation

Inspecting your duct insulation regularly is vital to ensure optimal efficiency. Without a proper inspection, you can miss potential insulation issues.

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