The ProBuilder 36 Clean Face is our mid-sized model that is ideal for providing zonal warmth to individual rooms in the home, such as family rooms and offices. The tall dancing flames and elegant “clean face” appearance of this fireplace will add both beauty and warmth to any living space. This Millivolt (MV) model features a Continuous Pilot system where the pilot flame stays lit at all times. This model is a great choice for anyone who desires a simple heat source that does not require power for installation and operation.