The Inferno Blue Flame Wall Mounted Hot Water Heater series is designed to make installation as easy as possible offering split or concentric venting. The BlueFlame Series is lightweight with a small footprint which also adds to the ease of installation. All of the heaters are pre-plumbed and pre-wired, so all the installation entails is that the installer connects the main electrical, gas and water supplies. It also comes with a specially designed heat exchanger that makes this heater extremely more efficient then the traditional designs. The special copper tube heat exchanger is specifically engineered for low hydraulic resistance, which will generate extra heat transfer thus increasing efficiency.