The large ProBuilder 42 Clean Face is perfect for great rooms and grand spaces ready for a bold statement. This model replicates the look of a huge traditional masonry fireplace with its massive viewing area, sleek lines and “clean face” design, all while providing excellent zonal warmth. The GreenSmart® Basic (GSB) model is an excellent energy-efficient choice. This model conserves fuel with a GreenSmart® pilot system that automatically lights the fireplace when heat is called for, and turns off the fireplace when no heat is needed.