05370400001

The Thermalflex 05370400001 25ft Insulated Flexible Air Duct, also known as the KMR4.2 Flex HVAC OIB duct, is a high-performance solution designed for transporting conditioned air in residential and light commercial heating, ventilation, and air conditioning (HVAC) systems. This duct is manufactured by Thermalflex, a reputable brand known for delivering quality and durability in their HVAC products.

The KMR4.2 Flex duct is constructed using a flexible, yet robust, inner liner made of reinforced polyester. This inner layer is coated with a smooth, white, PVC finish that is resistant to abrasion and tear. The duct's flexibility enables it to conform to various shapes and contours, making it ideal for installation in tight spaces or around corners.

The Thermalflex 25ft Insulated Flexible Air Duct is insulated with a thermal blanket made of polyurethane foam, which provides excellent insulation, helping to maintain the temperature and efficiency of the conditioned air being transported. The insulation is covered with a reflective aluminum foil layer to further enhance thermal performance, and a vapor barrier is included to prevent condensation from forming within the duct.

One of the key features of this Thermalflex duct is its high airflow capacity. It is designed to accommodate a maximum airflow velocity of 1500 FPM (feet per minute), making it suitable for larger HVAC systems. The duct's diameter is 6 inches, and it can withstand a static pressure of up to 0.5 inches water gauge.

This Thermalflex 25ft Insulated Flexible Air Duct comes with quick-connect fittings that make installation easy and efficient. The fittings are designed to provide a secure and airtight connection, ensuring minimal air leakage. The duct is also compliant with the strictest industry standards, including the UL 181 and UL 181B standards for safety and fire resistance.

In summary, the Thermalflex 05370400001 25ft Insulated Flexible Air Duct (KMR4.2 Flex HVAC OIB) is a high-performance, flexible, and insulated duct designed for transporting conditioned air in HVAC systems. Its robust construction, excellent insulation, and quick-connect fittings make it a reliable and efficient solution for both residential and light commercial applications.

Thermalflex 05370400001 is a 25-foot insulated flexible air duct with a Kimrex KMR4.2 flex connector, designed for use in HVAC systems. Here are some pros and cons of buying this product:

1. Insulated: The duct is insulated, which helps reduce energy loss and improve overall system efficiency.

2. Flexible: The flexible design allows for easier installation in tight spaces and around corners.

3. Durable: The Kimrex KMR4.2 flex connector is designed to be leak-free and resistant to damage from normal use.

4. Easy to install: The flexible design and quick-connect fittings make installation relatively simple.

1. Cost: This insulated flexible air duct is more expensive than non-insulated ducts of the same length.

2. Size: At 25 feet long, this duct may be longer than what is needed for some HVAC applications.

3. Limited compatibility: This duct is specifically designed for use with the Kimrex KMR4.2 flex connector, and may not be compatible with other connector types.

In conclusion, the Thermalflex 05370400001 25ft insulated flexible air duct with Kimrex KMR4.2 flex connector offers several advantages, including insulation, flexibility, durability, and ease of installation. However, it comes with a higher cost compared to non-insulated ducts, and may be longer than necessary for some applications. Additionally, it is only compatible with the specified connector type.

If you are looking for an insulated, flexible air duct for your HVAC system and are willing to pay a premium for these features, then this product may be a good choice for you. However, if cost is a major concern or if you have compatibility issues with the connector type, you may want to consider other options.

Details:

It is packed inside its original manufacturer box. Ships quickly in its original factory box. ### condition notes: this item is brand new and completely unused. Insulation rating: r-4.2 thermal efficiency to minimize energy loss and prevent condensation issues.

## Thermaflex 4 x 25' insulated flexible air duct KMR4.2 - new, up for sale is a brand new, unused Thermaflex KMR4.2 class 1 duct Thermaflex pn. Dimensions: 4 inner diameter x 25' total length . The internal ducting remains perfectly intact, clean, and completely ready for installation. Installation: convenient, step-by-step installation instructions are printed directly on the exterior packaging as shown in image 20260524 154743 188.JPEG.

specifications maxohvac:

• brand: Thermaflex
• mpn: 05370400001
• model: 4 Kmr4.2
• type: Flexible Duct
• unit type: Unit
• country of origin: United States

offer maxohvac:

• sold #: 11
• options: ship-to-home
• started: may 31, 2026
• availability: in stock
• in stock #: 1
• best offers: true
• price: $129.00
• item condition: New

payments maxohvac:

• wallet: paypal
• other
• credit card: mastercard

shipping maxohvac:

• transit: 4-8 days
• type: fixed
• carrier: usps
• service: usps ground advantage
• class: standard

seller maxohvac:

• city: anoka, minnesota
• rating: 0.0%
• # reviews: 6

returns maxohvac:

• policy: no returns

general maxohvac:

• category: Business & Industrial > Hvac Refrigeration

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