Hitze - Ardente DuoDeep combustion chamber. A new type of guillotine. Increased mass for greater heat accumulation. Fireplace insert suitable for recuperation. 90x41 105x43 120x43 Energy class: A >> >> Ecodesign + >> >> BlmSchV II + >> >> Nominal power (kW) 18 20 22 Heating load range [kW] 9 23 10 26 11 28,5 Thermal efficiency [%] 79 78 76,5 Pollen emissions at 13% O2 (g m) 0,035 0,036 0,036 CO emissions at 13% O2 (g m) 0,584 0,508 0,431 Weight (kg) 350 395 421 Flue