ACQUAFUN2 LN P is an open-chamber instantaneous gas water heater with low NOx emissions, available in 11 and 14-liter models, in both MTN and LPG versions. Its compact size and battery power supply make the product quick and easy to install.
Technical Features
Model
- Acquafun² LN P
- Gas: Methane
- Product code: 20213223
Energy Efficiency
- Sanitary energy efficiency class: A
- Health load profile: M
- Domestic energy efficiency (ηwh): 76.6%
- Daily gas consumption (Qfuel): 8168 kW/h
- Annual gas consumption (AFC): 1666 kW/h
- Internal sound power level (LWA): 56 dB
- Nitrogen oxide (NOx) emissions: 30 mg/kWh
Performance
Waterfall
- Minimum sampling range: 3 liters/min
- Maximum sampling range: 10.4 litres/min
- Minimum water temperature rise: 23.5°C
- Maximum water temperature rise: 48.8°C
Gas
- Minimum/normal/maximum pressure: 0.3 / 2.0 / 10 bar
- Water connections: Ø 1/2”
- Nominal gas supply pressure (G20/G31): 20 / 37 mbar
- Gas connection: Ø 1/2”
- Smoke temperature (G20/G31): 144 / 152°C
Characteristics
- Type: Open room
- Draft: Natural draft
- Power supply: 2 x 1.5V batteries
- Flame control: Ionization
- Flame modulation: Proportional
- Hot water production Δt=30°C (G20/G31): 8.8 / 8.4 litres/min
- Nominal heat input (G20/G31): 21.5 / 21.5 kW
- Nominal heat output (G20/G31): 18.5 / 18.5 kW
Dimensions
- Flue pipe diameter: 110 mm
- Dimensions (H×W×D): 636×350×225 mm
- Net weight: 12.7 kg
General Features
ACQUAFUN2 LN P

New open-chamber gas-fired instantaneous water heater with low NOx emissions
Riello presents Acquafun² LN P, the new open-chamber instantaneous water heater, suitable for residential use.
Acquafun² LN P is part of Riello's range of low-NOx emission products, providing excellent domestic comfort while complying with the latest European emissions regulations. The product is available in 11 and 14 l/min capacities, in both natural gas and LPG versions, with dedicated codes.*
Ease of installation and maintenance, together with simplicity of use for the end user, are the characteristics that make Acquafun² LN P the ideal product for the production of domestic hot water in residential contexts.
INTUITIVE AND EASY TO USE INTERFACE
Acquafun² LN P has a very simple to use interface.
Thanks to the knobs for regulating the gas flow, on the left, and the water flow, on the right, you can manage your comfort in a simple and immediate way.
At the center of the interface, a small display instantly communicates the hot water temperature or signals any error messages.
The independent control of the flame and water simplifies the regulation of the water temperature and allows the user to choose the one best suited to their needs.

THE TECHNOLOGY AND THE ADVANTAGES
- Production of domestic hot water of 11 and 14 litres/min with ΔT 25°C.
- Cooled burner to reduce NOx emissions formed during high-temperature combustion processes.
- Safety devices: flame ignition sensor, safety valve, limit thermostat and flue gas thermostat.
- Electronic battery ignition with pilot electrode.
- Automatic proportional power variation: the water heater is able to adapt the flame modulation and, therefore, the gas consumption, to the required water withdrawals.
- Pressure regulator as standard: keeps the water heater's power stable regardless of any pressure variations that may occur in the gas network.
- Optimized thermal efficiency thanks to energy-saving combustion technology.
- Ignition even at low water pressure, up to 0.03 bar.
- Simple aesthetics that can easily be integrated into domestic environments combined with a compact design that makes installation quick and easy.