Hot water Tanks and Boilers > Prestige 18 Excellence MkIII

Very high efficiency wall hung condensing boiler
Dual application boiler with 62 litres domestic hot water tank
Heat exchanger made of stainless steel with outstanding resistence to high temperature corrosion
Premix gas burner, for natural gas or propane
With 12 litres expansion vessel
Intuitive user controls
Advanced programmable options
Internet ready, via optional gateway
Sealed combustion chimney connection
Hydraulic kits and control devices available in option

Main characteristics
Input max. (heating) (kW) : 18
Input min. (heating) (kW) : 2,2
Output power max. (80/60°C) (kW) : 17,5
Efficiency (max. output) 80/60°C (%) : 97
Peak flow at 40 °C (L/10') : 175
Dim. - Width or Diameter (w/o conn.) (mm) : 630
Dim. - Depth (w/o conn.) (mm) : 560
Dim. - Height (w/o conn.) (mm) : 1000

Design characteristics

Concentric chimney connection Ø 60/100 mm with sampling point
Automatic air vent valve
Burner unit
Stainless steel heat exchanger
Exhaust tube
Condensate collector
Condensate trap
Acoustic insulation
Air inlet tube
12 litre heating circuit expansion tank
Control panel

Technical specifications (*)
CharacteristicsValue
Input max. (heating) 18 kW
Input min. (heating) 2,2 kW
Output power max. (80/60°C) 17,5 kW
Output power min. (60/80°C)) 2,1 kW
Efficiency (max. output) 80/60°C 97 %
Efficiency at 100% load (50/30°C) 106,1 %
Efficiency at 30% load (EN677) 109 %
CO emissions (max./min. output) 10 mg/kWh
NOx emissions (max./min. output) 39,9 mg/kwh
NOx class (EN483) 5
Flue gas temperature at max.output 80/60°C 62 °C
Mass rate of combustion products (gas) 29,56 Kg/h
Chimney: Max.pressure drop in flue pipe 130 Pa
Chimney: max. length of concentric flue pipe 25 m
Chimney connection Ø 60/100 80/125 mm
Gas flow rate G20 (max.output) 1,9 (20mbar) m³/h
Gas flow rate G25 (max.output) 2,21 (25 mbar) m³/h
Gas flow rate G31 (max.output) 0,74 (37 mbar) m³/h
CO2 (max / min output) G20/G25 8,9 / 8,6 %CO2
CO2 (max / min output) G31 10,5 / 10,2 %CO2
Connection - gas 3/4" (M) Ø
Capacity (primary) 16 L
Capacity (domestic hot water) 54 L
Capacity expansion tank(s) 12 L
Water pressure drop boiler at Δt = 20°C 85 mbar
Primary flow 740 L/h
Connection - heating (F) 3/4" (M) Ø
Max. operating temperature 90 °C
Max.service pressure heating (primary) 3 bar
Max.service pressure (DHW) 10 bar
Protection X4D
Operating voltage (50Hz) 230 V
Electrical consumption 135 W
Dim. - Width or Diameter (w/o conn.) 630 mm
Dim. - Depth (w/o conn.) 560 mm
Dim. - Height (w/o conn.) 1000 mm
Weight (empty) 78 Kg