ADVANTAGES
  - Extremely high efficiency (up to 93.8%, 24FF)
  - LCD display and intuitive menu
  - Compatible with the Ariston Net app
  - By installing a thermostatic mixing valve, it is possible to connect to natural circulation solar systems.
  - The boiler is equipped with everything necessary for domestic hot water (DHW) supply
  - By connecting a thermoregulation device, heating can be programmed for the entire week
  - Adapted for heating large areas
  - The use of the best materials ensures high reliability and a very long service life
  - Boiler protection against the accumulation of impurities contained in the water, provided a filter is installed on the return line of the heating circuit
  - Anti-freeze and anti-scale system
  - An external connector for connecting analysis devices makes it easy to assess combustion quality.

THERMAL CHARACTERISTICS
Max./min. nominal thermal power (Hi): 25.8/11.0 kW
Max./min. nominal thermal power (Hs): 28.7/12.2 kW
Max./min. nominal DHW thermal power (Hi): 27.0/11.0 kW
Max./min. nominal DHW thermal power (Hs): 30.0/12.2 kW
Max./min. thermal power: 23.7/9.9 kW
Max./min. DHW thermal power: 25.0/10.2 kW
Combustion efficiency (at flue gas outlet): 92.7%
Efficiency at nominal thermal power (60/80 °C) Hi/Hs: 91.9/82.8%
Efficiency at 30% thermal power (47 °C) Hi/Hs: 91.2/82.1%
Efficiency at minimum thermal power. Hi/Hs: 90.2/81.2%
Efficiency rating (dir. 92/42/EEC): **
Max. thermal losses through boiler casing (ΔT = 50 °C): 0.8%
Thermal losses with flue gases during burner operation: 7.3%
Thermal losses with flue gases with burner off: 0.4%

EMISSIONS
Minimum draft: 4.1 Pa
NOx emission class: 2
Combustion temperature (G20): 116°C
CO2 content (G20): 5.40%
CO content (0% O2): 54 ppm
O2 content (G20): 10.80%
Max. flue gas output: 67.2 kg/hour
Excess air: 105%

HEATING CIRCUIT
Expansion tank pressure: 0.1 MPa (1 bar)
Maximum pressure in central heating circuit: 0.3 MPa (3 bar)
Expansion tank volume: 8 L
Max./min. temperature in central heating circuit: 82/35 °C

DOMESTIC HOT WATER CIRCUIT
Max./min. DHW temperature: 60/36 °C
Average DHW performance level (10 min. – ΔT=30 °C) (instantaneous water heaters): 11.8 L/min.
DHW performance (ΔT=25 °C): 14.3 L/min.
DHW performance (ΔT=35 °C): 10.2 L/min.
DHW comfort level according to EN13203: **
Minimum hot water flow rate: