ClassicFlame 26EF023GRG-201 26" Contemporary Electric Fireplace Insert 4,600 BTU heater provides supplemental zone heating for up to 400 square feet Flame effect can be operated with or without heat, providing the ambiance of a gentle rolling fire all year long The Spectrafire flame effect technology has six brightness settings, which allows for the adjustment of the blue flame effect providing a more real gas burning fire or an amber flame effect for a traditional flame effect Adjustable thermostat allows you to decide the temperature of your room Simple, hassle-free installation, requires no venting or gas lines. Includes an owners manual and easy-to-follow instructions for installation.