NAP.9700 100K BTU 2STG W/ECM (GAS FUR) The Napoleon Ultimate 9700 Series Gas Furnace is the most stylish in the industry and will meet all your heating needs. The two-stage system creates a consistent, comfortable temperature throughout your home. The furnace will operate on the first, low fire stage for greater efficiency and comfort for most of the heating season. On colder days, the furnace automatically switches to the high fire, second stage to produce additional heat for your home. This effective two-stage system is like having two furnaces in one. Napoleon’s superior engineering and design guarantees reliable and efficient heat for years to come. With the Ultimate 9700 Series furnace, you’ll forget it’s winter.