GW22T GW26T GW37T
Gas Connection Diameter mm 26.44 26.44 26.44
  Consumption (G20) Min m³/h 0.51 0.65 0.91
    Max m³/h 2.37 2.87 3.85
  Consumption (G25) Min m³/h 0.59 0.75 1.09
    Max m³/h 2.76 3.34 4.63
  Consumption (G31) Min m³/h 0.19 0.25 0.36
    Max m³/h 0.91 1.11 1.51
  NOx class   5 5 5
  NOx level (G20) mg/kWh 38.3 40.17 43.61
  NOx level (G25) mg/kWh 38.21 41.69 45.18
  NOx level (G30) mg/kWh 58.3 64.38 83.34
Central heating Heat input Qn (net calorific value) Nom Min kW 4.8 6.1 8.9
      Max kW 22.4 27.1 37.7
  Heat input Qn (gross calorific value) Nom Min kW 5.33 6.77 9.88
      Max kW 24.88 30.1 41.87
  Output Pn at 80/60°C Min kW 4.5 5.8 8.5
    Nom kW 21.6 26.2 36.5
  Output Pnc at 50/30°C Min kW 5.21 6.64 9.58
    Nom kW 24.19 29.13 39.96
  Output at 37/30°C Nom kW 7.16 8.72 12.08
  Water temperature Max °C 85 85 85
Domestic hot water Temperature Max °C 70 70 70
Supply air Concentric   Yes Yes Yes
Flue gas Temperature Max °C 74 74 85
  Mass flow (G20) Max kg/h 35.64 45.36 57.96
  Mass flow (G25) Max kg/h 35.64 43.92 57.6
  Mass flow (G30) Max kg/h 34.56 41.76 54.36
  Mass flow (G31) Max kg/h 35.64 41.76 54.36
Casing Colour   Titanium White (Ral9003) Titanium White (Ral9003) Titanium White (Ral9003)
Space heating General Seasonal space heating eff. class   A A A