The White Mountain Hearth by Empire Heritage Cast Iron Vent Free Gas Stove is a radiant powerhouse. With 25,000 btus it can heat 450-600 square feet, even when the power goes out. Empire Cast Iron Stoves are available in two types of ignition – Millivolt (MV) and Intermittent Pilot (IP). The Millivolt system lights a standing pilot with a push-button piezo ignitor. Once the standing pilot is lit, the MV system operates with an on/off switch concealed on the back of the stove or with an optional on/off or thermostat remote control system. IPI systems eliminate the standing pilot for even greater energy savings. Pressing the on/off switch ignites the pilot, which then ignites the main burner. IP systems can also operate with an optional remote control system. Choose from three colors – porcelain black, porcelain mahogany, and matte black. Empire Heritage Cast Iron Stoves ship assembled in one crate, for easier set-up.