Choosing a zero-clearance, ventless gas fireplace can deliver inviting warmth without the need for a bulky chimney. This guide highlights five top options from Duluth Forge and Comfort Glow that fit a range of spaces, from compact inserts to mantel-supported systems. Each selection balances heating power, dual-fuel versatility, remote controls, and stylish finishes. Explore practical features, installation considerations, and how to choose the best zero-clearance gas fireplace for your home.
| Product | BTU | Heats Up To | Fuel | Notes |
|---|---|---|---|---|
| Duluth Forge Dual Fuel Ventless Fire Insert (Remote) | 32,000 | 1500 sq ft | Natural Gas or LP | Remote, 9 logs |
| Duluth Forge Dual Fuel Ventless Fire Insert (Thermostat) | 26,000 | 1350 sq ft | Natural Gas or LP | Thermostat control, 5 logs |
| Duluth Forge Mantle System, Slate Gray | 32,000 | 1500 sq ft | Natural Gas or LP | Mantel, remote, 6 logs |
| Duluth Forge Mantle System, Antique White | 32,000 | 1500 sq ft | Natural Gas or LP | Mantel, remote, 9 logs |
| Comfort Glow Log Insert, 24″ | Not listed | 1400 sq ft | Natural Gas or LP | Remote, thermostat capable |
Duluth Forge Dual Fuel Ventless Fire Insert, Remote
The Duluth Forge dual-fuel ventless fire insert delivers flexible energy options by supporting both natural gas and liquid propane. With up to 32,000 BTU, it can heat areas up to about 1,500 square feet, making it suitable for medium-to-large living spaces. A remote control with an LCD screen provides convenient on/off control, flame adjustments, and timer options, while a standing pilot ensures reliable ignition. The unit includes nine hand-painted ceramic logs to create a realistic flame and ember effect, complemented by a mesh screen for a finished look. This insert is designed to operate ventlessly, eliminating the need for external ducting or a chimney, and its sleek black finish complements a variety of interior styles.
Duluth Forge Dual Fuel Ventless Fireplace Insert With Thermostat
This ventless insert offers dual-fuel versatility with 26,000 BTU that can heat roughly 1,350 square feet. It features an easy-to-use thermostat that automatically cycles the unit on and off to maintain the desired room temperature, providing consistent warmth without manual adjustments. The design includes five hand-painted ceramic logs and a mesh screen to enhance aesthetics and safety. While it does not list a remote in its features, the thermostat control delivers precise temperature management for energy efficiency. The unit is compatible with Natural Gas or LP, delivering reliable warmth for residential spaces.
Duluth Forge Mantle Fireplace System, Slate Gray
This mantle-style fireplace system combines a ventless dual-fuel insert with a decorative mantel. It delivers up to 32,000 BTU and heats up to 1,500 square feet, making it appropriate for larger living rooms or open-plan spaces. A remote control allows on/off operation and flame adjustments, while the unit includes a standing pilot and manual flame control for added reliability. The mantle features a stylish, furniture-grade finish with light distressing and burnishing on edges, plus double doors and sprayed brick liner for a classic fireplace presentation. The system provides a balanced blend of warmth and ambiance in a compact footprint.
Duluth Forge Mantle Fireplace System, Antique White
The Antique White mantle system offers a generous 32,000 BTU output suitable for spaces up to 1,500 square feet. It features a remote control, a standing pilot, and a thermostat-like control to toggle between manual and temperature-based operation. With nine hand-painted logs and a refined mantle, the unit presents a warm, inviting focal point for living rooms or dens. The double doors and sprayed brick liner contribute to a traditional fireplace aesthetic while maintaining ventless convenience and high heating efficiency for year-round comfort.
Comfort Glow Log Insert, 24-Inch Highland Ember
The Comfort Glow 24-inch Highland Ember log insert provides a ready-made flame display with eight realistically detailed logs designed for dual-fuel operation (LP/NG). It heats up to about 1,400 square feet, offering substantial warmth for medium-sized rooms. A thermostat remote control enables convenient temperature management from a distance, and the dual-fuel design accommodates natural gas or propane depending on availability and costs. Remote operation, a simple installation pathway, and a traditional log-on-fire appearance make this option a practical choice for updating an existing fireplace with ventless heat and ambiance.
Buying Guide
Key Purchase Considerations
- Ventless operation: All five options are designed to heat without external venting, which simplifies installation but requires proper clearance and carbon monoxide considerations. Check local codes and ensure proper room ventilation where needed.
- Fuel flexibility: Dual-fuel capability (natural gas or propane) provides versatility and potential cost savings. Confirm gas line compatibility and available fuel type for your home.
- Heat output vs room size: BTU ratings indicate potential warmth. Higher BTU units (around 32,000) are better for larger rooms up to 1,500 sq ft, while lower BTUs are suitable for smaller living spaces.
- Remote control and thermostat features: Remotes with LCD screens and thermostat controls offer convenient operation and energy efficiency. Evaluate whether a thermostat-based system better suits your lifestyle and energy goals.
- Aesthetics: Mantle options provide a built-in, furniture-like look, while inserts focus on flame realism and log design. Consider whether you want a traditional mantel, a sleek modern insert, or a combination of both.
Performance and Efficiency
- Efficiency and heat distribution: Ventless systems typically deliver rapid heat; however, efficiency claims (such as 99.9%) can vary by model. Verify certifications and manufacturer specifications.
- Heat area: Evaluate the intended space. Most units in this guide heat between 1,000 and 1,500 square feet, making them suitable for living rooms, family rooms, or open layouts.
- Logs and flame realism: More logs and detailed flame patterns enhance ambiance. The models range from 5 to 9 logs, with hand-painted finishes for a natural look.
Installation and Maintenance
- Clearances and mounting: Even ventless units require proper clearance around the opening and mantle or surround. Mantle units may need additional framing or cabinetry work.
- Electrical and remote components: Remote controls and LCD interfaces require battery replacements and occasional maintenance. Ensure accessible electrical supply for remote features.
- Cleaning and upkeep: Regularly remove dust from logs and glass panels, inspect for condensation, and follow the manufacturer’s cleaning guidelines to preserve flame appearance and efficiency.
Safety and Compliance
- Ventless combustion safety: Ventless fireplaces produce combustion byproducts; ensure proper room ventilation and install carbon monoxide detectors according to local codes.
- Automatic shutoff and pilots: Look for models with standing pilots or automatic shutoff features for enhanced safety and reliability.
- Child and pet safety: For homes with children or pets, consider the external finishing and screen protection to reduce accidental contact with hot surfaces.
How To Choose
- Identify space constraints: If you want a mantle, choose a mantel system; otherwise, an insert may be more compact and flexible for existing openings.
- Balance aesthetics with function: Remote operation and thermostat control add convenience; however, the visual style of logs, flames, and surround should match your décor.
- Plan for future costs: Consider fuel availability and potential price fluctuations between natural gas and propane when selecting a dual-fuel model.