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Onnline II DUO 25 24.5 kW
230 V

Photos - Boiler Onnline II DUO 25 24.5 kW 230 V
Expecting restock
Energy source: gas; Installation: wall; Type: dual-circuit (heating and DHW); Heating area (m²): 196; Condensing; Heat output (kW): 24.5; Coolant min. T (°C): 25; Coolant max. T (°C): 80; DHW min. T (°C): 30; DHW max. T (°C): 60; Heated floor mode; Efficiency (%): 108; Combustion chamber: closed (turbocharged)
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Onnline II DUO 25 24.5 kW
230 V
Energy source:gas
Mount:wall, dual-circuit
Boiler power:24.5 kW, area ~ 196 m²
Combustion chamber:closed, flue 60/100 mm
DHW temperature:from 30 °С, up to 60 °С
All specifications
Specifications II DUO 25
Main
Energy sourcegas
Installationwall
Typedual-circuit (heating and DHW)
Heating area196 m²
Condensing
Technical specs
Heat output24.5 kW
Min. heat output3.3 kW
Power supply230 В
Power consumption96 W
Coolant min. T25 °С
Coolant max. T80 °С
Heating circuit max. pressure3 bar
DHW circuit max. pressure8 bar
Consumer specs
DHW min. T30 °С
DHW max. T60 °С
"Summer" mode
Heated floor mode
Circulation pump
Boiler specs
Efficiency108 %
Combustion chamberclosed (turbocharged)
Flue diameter60/100 mm / 80/80 mm for separate /
Inlet gas pressure20 mbar
Max. gas consumption2.67 m³/h
Connections
Mains water intake1/2"
DHW flow1/2"
Gas supply3/4"
Central heating flow3/4"
Central heating return3/4"
Safety
Safety systemsgas pressure drop
water overheating
flame loss
draft control
More specs
Dimensions (HxWxD)793x400x310 mm
Weight36.5 kg
Added to E-CatalogJuly 2026
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.