10 Best Gas Fireplace Inserts 2025 in the United States

The Duluth Forge Dual Fuel Ventless Gas Fireplace is a versatile insert designed to heat spaces up to 1,500 square feet with a strong 32,000 BTU output. Its standout feature is the ability to use either natural gas or liquid propane, giving flexibility depending on your home's fuel setup. Being ventless means it doesn’t require a chimney or ductwork, making installation easier and less costly, but it needs proper room clearance and good ventilation for safety. The fireplace comes with a stylish antique white mantle and six hand-painted ceramic logs that look realistic, adding a cozy, classic feel to your living space. The remote control with an LCD screen lets you easily switch between manual and thermostat modes to maintain your preferred temperature without hassle.

With an efficiency rating of 99.9%, the unit converts most of the fuel into heat, helping save on energy costs. Safety features include an oxygen depletion sensor that shuts off the unit if air quality drops, along with a reliable battery-assisted Piezo ignition system. The unit is fairly large (45" wide and deep, 15" high), requiring a good amount of space and clearance, which may limit its fit in smaller rooms. Additionally, as a ventless model, monitoring indoor air quality and following installation guidelines carefully is important to avoid ventilation issues. This product is well suited for homeowners seeking an easy-to-install, efficient heating solution that offers fuel flexibility combined with attractive design, while those with smaller rooms or a preference for vented systems might consider other options.

The Empire Comfort Systems Tahoe Clean Face Direct Vent MV Deluxe 42" NG Fireplace is a solid choice for those looking to add a natural gas fireplace insert that combines classic style with efficient heating. It runs on natural gas and offers 14,000 BTUs of heat, suitable for warming spaces up to about 782 square feet, making it a good fit for medium-sized living rooms. The direct vent system helps ensure safer indoor air quality by pushing exhaust outside, which is a big plus for a cleaner and more efficient installation. The fireplace includes a blower to help circulate warm air better throughout your room.

Its size is fairly standard for a 42" model, so it should fit well into existing setups or new wall-mounted installations. Aesthetic touches like hand-painted ceramic fiber logs and a matte black finish give it a realistic, classic look that many will appreciate. Weighing 130 pounds, installation may require professional help.

If you want a dependable, stylish natural gas insert with decent heating for your living room, this model is a good fit, though you may want to explore other options if you require more detailed efficiency data or advanced ignition features.

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.