Mason-Lite 4" Combustion Air Kit with 3" Flexible Vent and Metal Hood - MFP4-AK-M

Enhance the performance and efficiency of your masonry fireplace with the Mason-Lite 4" Combustion Air Kit with 3" Flexible Vent and Metal Hood - MFP4-AK-M. Designed to provide outside combustion air directly to your fireplace, this premium air kit helps improve airflow, reduce indoor air loss, and support cleaner, more efficient fireplace operation.

The MFP4-AK-M kit includes a closable firebox inlet that fits the pre-cut opening in compatible Mason-Lite fireboxes, a durable 3-foot flexible vent conduit, and an outdoor hood for proper ventilation. Ideal for residential fireplace installations, this combustion air kit is an essential accessory for maintaining optimal fireplace performance and energy efficiency.

Perfect for wood-burning fireplace systems, the Mason-Lite air kit is engineered for straightforward installation and dependable operation. For installations using fireplace panels, a hole must be cut to accommodate the air kit. Square-sided linear or custom fireplace units require a See-Thru Air Kit configuration.

Features

• Designed for Mason-Lite fireplace systems
• Includes closable firebox inlet for airflow control
• Comes with 3' flexible vent conduit for easy installation
• Includes durable outdoor metal hood
• Helps improve fireplace combustion efficiency
• Reduces indoor heated or cooled air loss
• Supports proper outside air intake for wood-burning fireplaces
• Fits pre-cut firebox opening for simplified setup
• Ideal for residential masonry fireplace applications
• Compatible with many Mason-Lite firebox models
• Required for certain custom and linear fireplace installations
• Durable construction for long-lasting performance