Combination Gas and Wood Burning Fireplace Insert

What Is a Combination Gas and Wood Burning Fireplace Insert?

A combination gas and wood burning fireplace insert is a hybrid unit designed to fit into your existing masonry or prefabricated fireplace. It features dual-fuel capability, allowing you to burn either natural gas or seasoned wood. This unique system typically includes a gas burner assembly, a wood grate, and a refractory-lined firebox that can handle both fuel types safely. The insert is designed to maximize heat output and efficiency, often with features like a built-in blower and thermostatic control.

This is the perfect solution for homeowners who want the best of both worlds. On chilly weeknights, you can simply flip a switch and enjoy the instant heat of a gas fireplace. On weekends or holidays, you can build a traditional wood fire for that nostalgic, rustic feel. The combination insert replaces your old, inefficient open hearth with a modern, sealed unit that significantly improves heating efficiency and reduces heat loss through the chimney.

Key Features and Benefits

How Does a Combination Insert Work?

The combination insert is a sophisticated unit that integrates two distinct fuel systems into one firebox. The gas system includes a burner, gas valve, and ignition system (either standing pilot or electronic). When you want to use gas, you open the gas line, ignite the burner, and the flames heat up the firebox and the logs. For wood, you simply open the damper, place logs on the grate, and light them as you would a traditional fireplace.

The insert is sealed with a glass door that provides a view of the fire while preventing room air from escaping up the chimney. A heat exchanger warms the air surrounding the firebox, and a blower circulates that warm air back into the room. This design ensures that most of the heat stays in your home. Many models feature a thermostat or remote control for the gas component, allowing you to set the desired temperature for automatic operation. With wood, you have manual control over the air supply to manage the burn rate and heat output.

What to Consider Before Buying

Investing in a combination insert is a significant decision. Before you purchase, consider the following factors to ensure you choose the right model for your home. For a broader perspective on different fireplace types, you might also explore our fireplace types guide and buying guide.

Key Factors to Evaluate

• Fireplace Dimensions: Measure your existing fireplace opening (width, height, depth) to ensure the insert fits. Inserts come in various sizes.
• Venting Requirements: Most combination inserts use a stainless steel liner installed inside your chimney. Ensure your chimney is in good condition. Fireplace ventilation requirements are crucial for safety.
• Gas Line Access: A natural gas line or propane tank is required for the gas burner. Check if your home has access or if a new line needs to be run.
• Heat Output: Match the insert's BTU rating to the size of your room. Use our guide on how to size a fireplace to calculate your needs.
• EPA Certification: For wood burning, ensure the insert is EPA-certified for low emissions and high efficiency.
• Installation Type: Consider if you want a direct-vent or vented insert. A direct vent gas fireplace insert with blower is often used for gas-only modes.

Gas vs. Wood: A Side-by-Side Comparison

To help you understand the strengths of each fuel mode, here's a detailed comparison of the gas and wood burning features in a combination insert.

Pros and Cons of a Combination Insert

Installation Guide

Proper installation is critical for safety and performance. A combination insert is not a DIY project for most homeowners. Professional installation is strongly recommended. The typical process involves:

1. Pre-Installation Inspection: A certified technician inspects your chimney and fireplace to ensure they are structurally sound and clean.
2. Liner Installation: A stainless steel flex liner is run from the insert down through the chimney to the top.
3. Insert Installation: The unit is placed into the fireplace, and the connection to the liner and gas line is made.
4. Gas Connection: For gas, a licensed plumber connects the gas line to the insert's valve.
5. Electrical Connection: If the unit has a blower or electronic ignition, electrical wiring is completed.
6. Test and Adjustment: The unit is tested for proper gas pressure, flame appearance, and operation.

For more detailed insights, see our guide on gas fireplace installation requirements and DIY vs professional installation.

Maintenance Tips

Keeping your combination insert in top condition ensures longevity and safe operation. Here are key maintenance tasks you should perform.

• Gas Mode: Annually check the burner and gas connections. Clean the glass and inspect the pilot for blockages. Gas fireplace maintenance is straightforward with regular care.
• Wood Mode: Regularly remove ash and have the chimney swept annually to prevent creosote buildup. Inspect the door seal for a tight fit. Wood fireplace maintenance requires more attention.
• General: Clean the blower fan occasionally to remove dust and improve airflow. Check the thermostat or remote batteries. Schedule a professional inspection every year for a thorough check.

Frequently Asked Questions