Buying Guide

B Vent: Using a single-walled pipe that pulls air from the room into the fireplace for combustion, B vent
gas fireplaces must always terminate vertically out of the home, either through the chimney or through
the roof via a pipe. This is not a closed system.
Ventless: Requiring no flue, ventless gas fireplaces burn at a higher temperature to exhaust harmful
fumes. Ventless fireplaces also boast oxygen-depletion sensors that automatically shut off the gas
should oxygen levels dip too low. Without a ventilation system, all of the heat stays inside of the home,
making it the most effective option of the three vent types. It’s important to note that ventless gas
fireplaces are not legal everywhere, so be sure to check your state and local codes for any restrictions.
Measuring Your Hearth Space
To determine the right size insert for an existing hearth, grab a tape measure and follow these three
easy steps for finding the width, height, and depth of the fireplace opening. Then, choose a log set or
insert that best fits your space.
Step 1: Measure the Width of the Fireplace Opening
To find the width, measure from wall to wall (side to side) in both the front (A) and back (B) of the
fireplace opening. Check the width of the firebox (the part of the insert where the fire actually burns),
which will sit approximately ten inches inside your fireplace opening. Then choose an insert that’s closest
in size to the width of your fireplace opening.