10 Best Gas Fireplace Inserts 2026 in the United States

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.

The Empire Comfort Systems 36" Direct-Vent LP Millivolt Control Fireplace is a solid option for a freestanding propane gas fireplace insert. It offers a heat output of 26,000 BTUs, suitable for warming a moderately sized room of around 320 square feet. The direct vent system vents outside, improving indoor air quality and efficiency. This unit runs on liquid propane and includes ceramic logs, a burner, tempered glass, and a decorative herringbone ceramic fiber brick background that enhances its modern look with an antique textured finish.

A notable feature is the millivolt control with an on/off switch that works without electricity, allowing it to provide heat during power outages—helpful for reliability. The adjustable thermostat lets you control the temperature for comfort and energy savings. The fireplace's dimensions (approximately 40 inches wide by 38 inches high and 20 inches deep) make it suitable for spaces where a freestanding unit is preferred, but measuring your space carefully is advised. The flame effect looks realistic and cozy, contributing nicely to room ambiance, while the ceramic burner and tempered glass ensure durability and safety.

This model balances heat output, style, and power outage functionality, making it a strong choice for those seeking dependable heating without electric reliance. Keep in mind the fireplace barrier screen or door set needs to be purchased separately to complete installation and ensure safety.

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.