Chaffoteaux NIAGARA ADVANCE 25 C low NOx condensing boiler, complete 3310626, split methane flue gas kit

Technical Features

Energy Efficiency

Nominal heat output in heating max/min (Hi) Qn kW 22/2,5

Nominal heat output in heating max/min (Hs) Qn kW 24.4/2.8

Nominal heat output in domestic hot water max/min (Hi) Qn kW 26.0/2.5

Nominal heat output in domestic hot water max/min (Hs) Qn kW 28.9/2.8

Max/min heating power (80°C-60°C) Pn kW 21.5/2.3

Max/min heating power (50°C-30°C) Pn kW 6 23.6/2.6

Max/min useful power for sanitary use Pn kW 24.9/2.4

Combustion efficiency (flue gas) % 97.4

Efficiency at nominal heat output (60/80°C) Hi/Hs % 97.7/87.9

Efficiency at nominal heat output (30/50°C) Hi/Hs % 106.7/96.1

Yield at 30% of Qn

with return to 30°C Hi/Hs % 109.7/98.8

Efficiency at minimum (60/80°C) Hi/Hs % 93.5/84.2

Performance stars (dir. 92/42/EEC) ****

Performance

NOx Class 6

Smoke temperature (G20) (80°C-60°C) °C 64

CO2 content (G20) (80°C-60°C) % 8.8

CO content (0%O2) (80°C-60°C) ppm 81

O2 content (G20) (80°C-60°C) % 4.3

Maximum smoke flow rate (G20) (80°C-60°C) kg/h 2.4

Excess air (80°C-60°C) % 26

Condensed pH pH 3.2

Maximum quantity of condensate l/h 26

HEATING CIRCUIT

Expansion vessel pre-charge pressure bar 1

Maximum heating pressure bar 3

Expansion vessel capacity 8 l

Heating temperature min/max (high temperature range) °C 35 / 82

Heating temperature min/max (low temperature range) °C 20 / 45

HEALTHCARE CIRCUIT

Min/max sanitary temperature °C 40 / 65

Specific flow rate in sanitary water (10 min. with ∆T=30°C l/min 13.2

Instantaneous quantity of hot water ∆T=25°C l/min 15.4

Instantaneous quantity of hot water ∆T=35°C l/min 11.0

Health comfort stars (EN13203) ***

Minimum hot water withdrawal l/min 2

Max/min domestic water pressure bar 7.0 / 0.3

ACS storage capacity l 40

Characteristics

Power supply voltage/frequency V/Hz 230 / 50

Total absorbed electrical power W 84.7

Circulator energy efficiency index EEI ≤ 0.23

Minimum ambient temperature for use °C >0

Electrical system protection rating IP X5D

Dimensions

Dimensions (Height x Width x Depth) 900 x 600 x 460 mm

Weight 42.5 kg