W4 boiler Inset- Dimensions: 780 (a) x 548 (b) x 534 (C) - Power: 26 kW - 6Kw to room and 20kW to water +/- - Yield: 75% Efficient - flue Diameter: 200mm - Energy Class 1 - Maximum Pressure: 1.5 - liter: 52 - Weight 182 kg