10 Best Gas Fireplace Inserts 2026 in the United States

The Majestic Ruby 35-Inch Direct Vent Natural Gas Insert is designed to fit into an existing wood fireplace, making it a practical upgrade for those wanting a cleaner, lower-maintenance heating option. It produces a strong 35,000 BTU output, which is suitable for heating a living room efficiently. The direct vent system ensures safer exhaust management by drawing air from outside, helping maintain indoor air quality. It uses natural gas as fuel, which tends to be cost-effective and reliable. The IntelliFire Touch ignition system is easy to operate and includes a remote control with touchscreen functionality, plus smartphone app compatibility for added convenience.

The visual appeal is enhanced by realistic logs and flames, creating a cozy and inviting firebox display. Its size (35 inches wide and 14.5 inches deep) fits standard fireplace openings but should still be measured carefully before purchase. The insert’s contemporary black painted metal finish offers a modern look that blends well with various interior styles.

This unit presents a strong option for homeowners looking to convert their existing fireplaces to a natural gas insert that combines good heat output with attractive aesthetics and user-friendly controls.

The Duluth Forge Ventless Stainless Outdoor Gas Fireplace Insert offers 24,000 BTUs of heat, which is sufficient to warm a moderate outdoor space comfortably. It operates on natural gas or propane and features a manual control ignition, requiring you to turn it on and adjust the flame yourself without an automatic ignition system. Being ventless, it doesn’t need a chimney or vent pipe, simplifying installation and saving space, which is especially useful for a clean look or limited room.

This insert has a slim, rectangular design that fits easily into existing setups or wall mounts. It uses a stainless steel H-burner with reflective copper glass media, creating a visually appealing flame effect that adds style without the need for logs. Made with high-quality materials and assembled in the USA, it is designed to be fuel-efficient by providing warmth without excessive fuel use.

Since it is vent-free, it may not be suitable for all indoor spaces due to ventilation concerns, and the manual control means less convenience compared to models with remote or electronic ignition. Weighing only 10 pounds, it is relatively easy to handle during installation. If you want a straightforward, stylish outdoor gas insert that offers warmth and ambiance without a complex setup, this model is a solid choice, though manual operation and proper placement for safety and comfort should be considered.

The Empire Comfort Systems Deluxe MV 34" Louver B-Vent Fireplace is a gas fireplace insert designed to heat indoor living spaces up to around 800 square feet. It runs on natural gas and provides a strong heat output of 21,000 BTUs, which is suitable for medium-sized rooms. This model uses a vented system (B-Vent), meaning it requires proper ventilation through an existing chimney or vent pipe, ensuring safe operation by removing combustion gases outside.

The fireplace features a ceramic heating element and a polished, modern design with a rectangular shape that fits well in many home styles. Its size is moderate at about 37 inches wide and 15 inches deep, making it a good fit for various installation spots, usually freestanding in a living room. The fireplace also includes a remote control for convenient ignition and operation.

It only supports natural gas as fuel, so homes without natural gas lines may face limitations. While it has a solid efficiency rating typical of vented gas fireplaces, it may not be as efficient as some newer ventless models, but it offers the safety benefits of proper venting. For those seeking a reliable, aesthetically pleasing fireplace insert that provides steady warmth and easy control, this model is a practical choice for medium-sized rooms with natural gas access and proper venting options.