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 Duluth Forge Ventless Stainless Outdoor Gas Fireplace Insert is an attractive choice for those looking to add warmth and style to their outdoor spaces. With a BTU rating of 24,000, it offers a solid heat output suitable for medium-sized areas. The ventless design is a key feature, allowing for flexible installation without the need for a chimney or flue, which is convenient for many homeowners. It uses a versatile fuel system, operating on either natural gas or propane, adding to its adaptability to different settings.

The manual ignition system, along with the battery-assisted Piezo igniter, ensures a straightforward start-up process, although some users might prefer an automatic ignition system for ease of use. The aesthetic appeal is enhanced by its sleek stainless steel construction and the inclusion of reflective crystal glass media, which creates an eye-catching flame display. Its compact dimensions make it a good fit for spaces where room is a concern, though the slim profile may limit the breadth of the heat it can radiate.

In terms of efficiency, while no specific rating is provided, the vent-free nature often implies better heat retention within the space. However, potential buyers should be aware of the manual control limitations, which might not offer the precise temperature regulation found in more advanced models. Assembled in the USA, the unit promises quality craftsmanship with a focus on durable materials. This fireplace insert is particularly suited for those who appreciate style and flexibility in their outdoor heating solutions, but it may not satisfy users seeking advanced technological features or automatic operations.