The Rinnai ES38-P is actually a similar design as the top select, but operates on propane rather than all-natural gasoline. This outstanding furnace is a good preference for many who need to use propane, with best-notch effectiveness and safety functions. Go through Whole Review See it at: Without the millivolts, http://emilianooxdkp.arwebo.com/10258726/the-5-second-trick-for-gas-furnaces-buying-guide