• Two 42" flexible insulated ducts with 4" diameter
• Maintains temperature control in cold climates
• Delivers outside air to firebox for combustion
• Reduces heat loss and supports efficient burning
• Designed for compatibility with Majestic air kits

The Majestic ID4 is ideal for homes in colder regions where uninsulated ducts could lead to unwanted heat loss. This kit features two 42" insulated 4" ducts designed to route outside air directly into your fireplace’s combustion chamber. By keeping incoming air at a stable temperature, it supports better combustion while protecting your home’s interior climate. Built to last and easy to install with Majestic systems.