HHT AKD Outside Air Kit with Access Door (Part #AKD)

Enhance Fireplace Efficiency with Dedicated Outside Combustion Air

Improve fireplace performance with the HHT AKD Outside Air Kit, designed to supply clean, external combustion air for optimal efficiency.

Key Features

• Designed for Monessen vent-free fireboxes (Attribute, BUF, Lo-Rider)
• Improves combustion efficiency and air quality
• Includes access door for airflow control
• Helps reduce negative air pressure in tight homes
• Durable components for long-lasting performance
• Compatible with 4” outside air duct systems (sold separately)

Product Features

Optimized Combustion Air Supply

Provides a direct source of outside air to your fireplace, improving burn efficiency and reducing indoor air depletion—ideal for modern, tightly sealed homes.

Integrated Access Door Control

Built-in left/right access door allows you to regulate airflow entering the firebox for better performance and control.

Compatible with Monessen Vent-Free Fireboxes

Specifically engineered for use with:

• Attribute Series
• BUF Series
• Lo-Rider Vent-Free Fireboxes

Ensures proper fit and reliable operation.

Improves Indoor Air Quality

Reduces reliance on indoor combustion air, helping maintain healthier air quality and minimizing drafts inside your home.

Flexible Installation Options

Can be installed on either side of the firebox, with multiple routing options including basement, slab, or crawl space configurations .

Exterior Air Hood Protection

Includes an outside air hood designed to prevent debris, snow, and blockages when installed properly above grade level .

Durable Construction for Long-Term Use

Manufactured by Hearth & Home Technologies for dependable performance in demanding heating applications.

Safety-Focused Design

• Prevents combustion air from being drawn from garages, attics, or enclosed spaces
• Designed to meet installation best practices and safety standards

Product Specifications