JOHNS MANVILLE 670378 Duct Insulation 48IN 1-1/2 25FT 6ZKK3

( Brand: Johns Manville ), ( Model: 1-1/2IN 48IN 25FT ), ( Type: Cuff, Duct Insulation ), ( Manufacturer Part Number: 670378 )

Review JOHNS MANVILLE Duct Insulation 1-1/2 Inch 48 25ft

Johns Manville's 670378 duct insulation is a high-performance insulation solution designed specifically for use in heating, ventilation, and air conditioning (HVAC) systems. This insulation comes in the form of unfaced, flexible duct liner with a thickness of 1-1/2 inches and a length of 25 feet. The part number for this product is 670378, and it is also known by the SKU number 6ZKK3.

The 1-1/2 inch thickness of this duct insulation provides excellent thermal insulation, helping to maintain consistent temperatures within the HVAC system and improve overall energy efficiency. This insulation is made from closed-cell polyethylene foam, which offers superior insulating properties and excellent resistance to moisture, air infiltration, and vapor transmission.

The flexible design of this duct insulation makes it easy to install in a variety of duct configurations. It is unfaced, meaning it does not come with an adhesive backing or facing material, allowing for greater installation flexibility. The insulation is also lightweight and easy to handle, making it an ideal choice for both new construction and retrofit projects.

The 48-inch width of this duct insulation allows it to be used in standard residential and commercial HVAC applications. It is suitable for use with both rigid and flexible ductwork, and can be easily cut to fit specific duct sizes using common insulation cutting tools.

Johns Manville's 670378 duct insulation is also environmentally friendly, as it contains no CFCs, HCFCs, or HFCs, making it an excellent choice for those looking to reduce their carbon footprint. The insulation is also resistant to mold and mildew, ensuring long-lasting performance and indoor air quality.

Overall, Johns Manville's 670378 duct insulation is a high-quality, flexible, and easy-to-install insulation solution for HVAC applications. Its excellent thermal insulation properties, moisture resistance, and lightweight design make it an ideal choice for maintaining energy efficiency, improving indoor air quality, and reducing environmental impact.

Johns Manville 670378 duct insulation, model number 6ZKK3, is a popular choice for insulating heating, ventilation, and air conditioning (HVAC) ducts due to its high R-value and durability. Here are some pros and cons of purchasing this duct insulation:

1. High R-value: With an R-value of 6.5 per inch, this insulation provides excellent thermal insulation, helping to maintain consistent temperatures within the ductwork and improve energy efficiency.

2. Dense and Durable: The closed-cell structure of this insulation makes it denser and more durable than open-cell insulation. It resists moisture, compression, and air infiltration, ensuring long-lasting performance.

3. Easy to Install: The 2' x 25' rolls make it easy to handle and install. The insulation comes with a vapor barrier on one side, eliminating the need for additional moisture barriers.

1. Cost: Compared to other insulation types, this closed-cell duct insulation tends to be more expensive due to its high R-value and durability.

2. Installation Requirements: Proper installation is crucial for the insulation's effectiveness. It may require specialized knowledge and tools, which could add to the overall cost.

3. Limited Availability: This insulation may not be readily available at all home improvement stores or online retailers, which could result in longer shipping times or additional travel to find it.

Johns Manville 670378 duct insulation, model number 6ZKK3, offers excellent thermal insulation, durability, and ease of installation, making it an excellent choice for insulating HVAC ducts. However, its higher cost and potential limited availability may be considerations for some homeowners.

If you're looking for high-performance duct insulation and are willing to invest in the cost, Johns Manville 670378 duct insulation is an excellent choice. If cost is a concern, consider open-cell insulation with a lower R-value or research alternative insulation brands with similar performance at a lower cost. Properly insulating your ductwork can lead to significant energy savings and improved indoor air quality, making it a worthwhile investment for most homeowners.

Details:

Insulation comes with a vapor barrier and 2 stapling tab.Meets ASTM C-411, C-1104, C665, C-1338, E-84; NFPA 90A; UL, C-UL Listed.Fiberglass Cotton Duct Insulation For use in commercial industrial heating, air conditioning, power process equipment applications. Power adapters and other modifications may be necessary for proper operation in countries.

part #: 670378 prices

• $59.49-$98.88

specifications aerationaura:

• brand: Johns Manville
• model#: 1-1/2IN 48IN 25FT
• type: Cuff, Duct Insulation
• manufacturer part number: 670378

general aerationaura:

• Home Improvement > Heating, Cooling Air > Other Heating, Cooling Air
• condition: New

offer aerationaura:

• started: July 18, 2025
• availability: In Stock
• options: Ship-to-home
• sold: 0

payments aerationaura:

• wallet: Google-pay
• other
• credit card: Discover

returns aerationaura:

• time: 30 Days
• method: Money back
• policy: Returns Accepted
• paid by: Seller

seller aerationaura:

• city: Minooka, Illinois
• # reviews: 110032
• rating: 99.3%

shipping aerationaura:

• service: UPS Ground
• class: Standard
• cost: $25.00
• carrier: UPS
• transit: 3-5 Days
• type: Fixed