10 Best Gas Fireplace Inserts 2026 in the United States

The Duluth Forge Ventless Stainless Outdoor Gas Fireplace Insert delivers a solid 24,000 BTU heat output, making it a good choice for those wanting to warm up their outdoor space efficiently without dealing with vent installations. Its vent-free design means it doesn’t require a chimney or flue, which simplifies installation and offers flexibility in placement, but it must be used in well-ventilated areas to be safe. The fuel type is natural gas, which is common and usually cost-effective.

It features a manual control system, allowing you to adjust the heat output yourself, though it lacks remote or smart home features that some modern users might prefer for convenience. Safety is well covered with a battery-assisted piezo ignition and an oxygen depletion sensor that automatically shuts off the unit if oxygen levels get too low, helping prevent dangerous situations. The insert has a chic stainless steel build combined with fire glass media and a log set, giving it a stylish, cozy look without taking up much space. Its compact dimensions (about 13x20x25 inches) make it suitable for various outdoor setups.

This fireplace insert is a straightforward, no-frills option that provides good heat output and safety in a sleek design, making the Duluth Forge model worth considering for enhancing your outdoor living area.

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 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.