The Ariston Prios Net 25 MUA1 is a wall-mounted monoblock split air conditioning system with a nominal cooling capacity of 2.6 kW (9,000 BTU/h), making it an ideal climate solution for rooms up to approximately 25 m². As the entry-level unit in the Prios Net range, it integrates built-in Wi-Fi for seamless smartphone control via the Ariston NET app, alongside ECO Mode for reduced energy consumption and Turbo Mode for rapid temperature recovery — all within a slim, architecturally refined indoor unit under 20 cm deep. Charged with low-GWP R32 refrigerant (GWP 675) and driven by a 2D Inverter compressor, the Prios Net 25 delivers Class A++ energy efficiency in both cooling and heating, with the heat pump function enabling operation even in ambient temperatures as low as −15 °C outdoor. Product code: 4213070.
A++
Energy Class (Cool & Heat)
Built-in
Wi-Fi (Ariston NET)
≤25 m²
Recommended Room Size
🔴 Installer Notice — F-Gas & Refrigerant Regulations
R32 refrigerant is mildly flammable (A2L classification). Installation, commissioning, and servicing must be carried out by a qualified F-Gas certified engineer. All refrigerant handling must comply with current UK F-Gas Regulations. Do not puncture or expose the refrigerant circuit to heat. Ensure adequate ventilation at the installation location.
🟠 Compatibility & Suitability Note
The Prios Net 25 MUA1 is a monoblock split system supplied as a matched indoor/outdoor unit set. It is not compatible with third-party outdoor units. Confirm that the installation location can accommodate the outdoor unit dimensions and provides adequate airflow clearance. For rooms larger than 25 m² at standard ceiling height (2.7 m), consider the Prios Net 35 MUA1 or larger.
🟢 Smart Climate Control — Built-in Wi-Fi & Ariston NET App
Unlike earlier Prios models requiring a separate Wi-Fi dongle, the Prios Net range features factory-integrated Wi-Fi. Connect directly to the Ariston NET app (iOS and Android) to schedule, monitor, and adjust your climate from anywhere. The app also provides energy consumption reporting to help track running costs and identify savings opportunities.
2D Inverter Technology
The dual-inverter compressor independently modulates both fan speed and compressor frequency. This dual-axis control means the system ramps down gradually once a setpoint is reached rather than cycling on and off — maintaining steady temperatures while consuming significantly less electricity than fixed-speed equivalents. The result is lower running costs, quieter operation, and reduced wear on internal components.
ECO Mode & 1W Standby
ECO Mode limits maximum power draw to favour economy over peak output, ideal for continuous background conditioning of occupied spaces. Complementing this, the unit's optimised standby logic cuts standby consumption by up to 80% to approximately 1 W — an often-overlooked source of energy waste on always-connected appliances.
Turbo Mode — Rapid Conditioning
Turbo Mode drives the system to maximum fan speed and compressor output to reach the desired setpoint in the shortest possible time. This is particularly useful when returning to a hot or cold room — pull-down time is dramatically reduced, then the unit automatically transitions to a quieter, more efficient operating level once the target temperature is achieved.
Golden Fin Anti-Corrosion Coating
The outdoor unit's heat exchanger fins are treated with Ariston's Golden Fin hydrophilic coating, which accelerates condensate drainage, improves defrost efficiency in winter, and provides durable protection against salt air, acid rain, and atmospheric pollutants. This significantly extends service life in coastal and urban UK environments where uncoated fins commonly corrode within a few years.
Follow Me & Airflow Comfort
The Follow Me function uses the remote control's built-in temperature sensor as the reference point rather than the wall unit sensor — so the system targets the temperature at your location within the room, not at the indoor unit. Airflow Comfort mode automatically redirects airflow: upward in cooling (preventing cold draughts) and downward in heating (distributing warm air at occupant level).
Self-Clean & Odour Filter
At shutdown, the Self-Clean function reverses the outdoor fan to blow air across the outdoor heat exchanger, dislodging accumulated dust and debris — maintaining heat transfer efficiency without manual cleaning. Inside, the anti-odour filter neutralises bacteria, mould spores, and common allergens, returning fresher, more hygienic air to the conditioned space.
| Technical Specification — Ariston Prios Net 25 MUA1 (Product Code 4213070) |
| Performance |
| Nominal Cooling Capacity |
2.6 kW (9,000 BTU/h) |
| Reference Size (kBPU) |
9,000 kBPU |
| Energy Efficiency Class (Cooling) |
A++ |
| Energy Efficiency Class (Heating) |
A++ |
| Refrigerant & Environmental |
| Refrigerant Type |
R32 |
| GWP (Global Warming Potential) |
675 (low-GWP) |
| Outdoor Operating Range (Cooling) |
−15 °C to +50 °C |
| Outdoor Operating Range (Heating) |
−15 °C to +30 °C |
| Indoor Unit |
| Indoor Unit Type |
Wall-mounted |
| Indoor Unit Depth |
<200 mm |
| Indoor Unit Weight (net) |
7.5 kg |
| Indoor Fan Speeds |
12 (incl. Turbo, Silence, Dehumidify) |
| Colour |
White |
| Outdoor Unit |
| Inverter Technology |
2D Inverter (compressor + fan) |
| Outdoor Fan Speeds |
5-speed DC motor |
| Heat Exchanger Treatment |
Golden Fin anti-corrosion coating |
| Connectivity & Control |
| Wi-Fi |
Built-in (no dongle required) |
| App Control |
Ariston NET (iOS & Android) |
| Operating Modes |
Cooling, Heating, Dehumidify, Fan, Auto, ECO, Turbo, Sleep |
| Standby Power |
≈1 W |
| Piping & Installation |
| Liquid Pipe Diameter |
¼ inch |
| Gas Pipe Diameter |
⅜ inch |
| Max Pipe Length (standard charge) |
5 m |
| Max Pipe Length (with additional charge) |
25 m |
| Max Height Difference (indoor/outdoor) |
10 m |
| Identification |
| Product Code |
4213070 |
| Manufacturer |
Ariston |
| Warranty |
2 years (official Ariston) |
Does the Prios Net 25 MUA1 include Wi-Fi connectivity out of the box?
Yes. Unlike the earlier Prios R32 range (which required a separately purchased Wi-Fi dongle), the Prios Net models feature factory-integrated Wi-Fi. On installation, simply connect the unit to your home network and download the free Ariston NET app on iOS or Android to access full remote control, scheduling, and energy monitoring.
Can the Prios Net 25 be used for heating in winter?
Yes. The unit incorporates a heat pump function capable of extracting heat from outdoor air at temperatures as low as −15 °C, making it well-suited to UK winter conditions. It achieves A++ heating efficiency and is considerably more economical than direct electric heating. An anti-cold-air function prevents the indoor fan from blowing cool air during the warm-up phase.
What is the difference between ECO Mode and Turbo Mode?
ECO Mode deliberately limits the system's maximum power output to reduce electricity consumption — best used when the room is occupied continuously and you want quiet, economical background conditioning. Turbo Mode does the opposite: it temporarily runs the compressor and fan at full power to reach the target temperature as quickly as possible, then automatically steps back to normal operation once the setpoint is achieved. Both modes are accessible from the remote control or the Ariston NET app.
Does R32 refrigerant require any special safety precautions?
R32 is classified as mildly flammable (A2L) and has a global warming potential of 675 — approximately one-third that of the R410A refrigerant it replaces, meaning significantly lower environmental impact. For safety, all installation and servicing must be carried out by a qualified F-Gas certified engineer using R32-compatible tools and equipment. End users should never attempt to open the refrigerant circuit.
What room size is the Prios Net 25 MUA1 suitable for?
Ariston rates the 25-series (9,000 BTU / 2.6 kW) as appropriate for rooms up to approximately 25 m² at a standard ceiling height of 2.7 m, subject to good thermal insulation. For larger rooms — between 25–40 m² — consider the Prios Net 35 MUA1 (3.5 kW), and for open-plan spaces up to 60 m², the Prios Net 50 MUA1 (5.3 kW). A room heat-loss assessment is always recommended before selecting a system.
