The ProBuilder 42 Linear is the smallest model in our lineup, featuring 42” wide by 15” tall glass. This value-priced fireplace is ideal for providing zonal heat to cozy living spaces in the home up to 1,250 square feet. This Millivolt (MV) model is a great choice for anyone who desired a simple heat source that does not require power for installation and operation, as it features a Continuous Pilot system where the pilot flame stays lit at all times.