This hybrid catalytic wood insert completes the look of any room. With modern technology and traditional design, enjoy the best of both worlds without sacrificing style or efficiency! The Regency Hampton Hi500 large hybrid wood burning fireplace insert is one of the original Regency inserts that feature Eco-Boost triple burn technology. When the included digital thermometer reaches the right temperature, use the bypass control to engage the catalyst; and watch your fire burn longer and more consistent, while still being environmentally friendly. Delivering up to 14 hours of heat with a single load of wood; fuel is used to its full potential with only 1.3 g/hr. of emissions and 79% efficiency!