HHT Uninsulated Outside Air Flex Duct | UD4

Name: HHT Uninsulated Outside Air Flex Duct | UD4
Brand: HHT
SKU: UD4
Price: 56.0 USD
Availability: InStock

by HHT

SKU UD4

$56.00 - $56.00

$56.00

$56.00 - $56.00

$56.00

Questions?

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HHT Uninsulated Outside Air Flex Duct

Ensure safe and efficient airflow with the HHT UD4 Uninsulated Outside Air Flex Duct, designed for reliable outside combustion air delivery.

Key Features

4" (100mm) flex duct
Includes two 42" (1065mm) sections
Improves fireplace performance
Durable construction for lasting use

Product Features

Optimized Airflow

The UD4 duct ensures a steady flow of outside combustion air to wood-burning or gas fireplaces, improving safety and efficiency.

Complete Kit

Includes two 42" sections of 4" (100mm) uninsulated ducting, providing flexibility and compatibility with most installations.

Easy Installation

Flexible construction allows the duct to be shaped and routed easily, simplifying installation in tight or angled spaces.

Built to Last

Crafted with high-quality materials, the UD4 resists wear and tear, ensuring long-term reliability in residential fireplace systems.

Product Specifications

Specification	Details
Manufacturer	Hearth & Home Technologies (HHT)
Model Number	UD4
Product Type	Uninsulated Outside Air Flex Duct
Duct Size	4" (100mm)
Included Sections	Two sections, 42" (1065mm) each
Application	Provides outside combustion air for fireplaces & stoves
Compatibility	Suitable for HHT fireplaces and other compatible units
Function	Improves combustion efficiency and reduces indoor air usage
Installation	Flexible design for easy routing and secure connections

Warranty

HHT Limited Warranty

Hearth & Home Technologies LLC (“HHT”) extends the following warranty for wood hearth appliances (each a “Product” and collectively, the “Product(s)”) and certain component parts outlined below (“Component Part(s)”) when purchased from an HHT authorized dealer or distributor.

Warranty Period	Component Parts Covered by this Warranty
1-Year Components Only	All purchased replacement parts and optional accessories

See the full HHT Limited Lifetime Warranty for complete terms, conditions, and exclusions. Coverage applies to products at the original installation site and may vary by component.