Comparison: Best Gas Fireplace Inserts Consumer Reports (Updated | Dec 16th)

The most critical factor is ensuring the insert is properly sized for your existing fireplace opening. An insert that is too small will look out of place and be inefficient, while one that is too large will not fit. Always measure your fireplace’s width, height, and depth before you begin shopping.

Direct vent inserts are highly efficient and safe because they pull combustion air from outside and exhaust fumes directly through a coaxial vent pipe. B-vent models use indoor air for combustion and vent exhaust through a single pipe, making them less efficient and requiring a pre-existing chimney liner. For most modern installations, Consumer Reports recommends direct vent for its superior performance and air quality.

Look for the Annual Fuel Utilization Efficiency (AFUE) rating, which measures the percentage of fuel converted into usable heat. A higher AFUE rating means the insert is more efficient, saving you money on gas bills. Top-rated models often have an AFUE of 80% or higher, while less efficient ones may be in the 60-70% range.

A variable-speed blower fan is a high-value feature that actively circulates warm air throughout the room, significantly boosting heating efficiency. Programmable thermostats and remote controls also add convenience and can help manage energy costs by allowing you to set specific temperatures and schedules. While realistic-looking logs and ember beds are aesthetically pleasing, prioritize functional features that improve heat output.

Calculate the square footage of the area you want to heat and consult the manufacturer’s recommendations for BTU output. A general rule of thumb is to have approximately 30-40 BTUs per square foot, but this can vary based on your home’s insulation and climate. It’s better to choose a model with slightly higher capacity and the ability to modulate its flame than one that is undersized for the space.

Installation is not a typical DIY project and should always be performed by a certified professional, such as a technician certified by the National Fireplace Institute (NFI). Improper installation can lead to serious safety hazards, including gas leaks and carbon monoxide poisoning. The cost of professional installation is a significant part of the total budget and should be factored in when comparing product prices.

Yes, gas inserts are available for either natural gas or liquid propane (LP). Your choice is typically dictated by what is already available in your home; you cannot easily switch between the two. Make sure you purchase the correct model for your fuel type, as they are not interchangeable.

Always look for a label from a recognized testing laboratory like Underwriters Laboratories (UL) or Intertek (ETL). This certification confirms the product has been tested and meets strict safety standards for operation in the United States or Canada. Additionally, ensure the installer includes a carbon monoxide detector as part of the new installation.