Vaillant aroVAIR pro VA 1-025 CSN - slim console fan coil 2.6 kW

Product detailed description

Vaillant aroVAIR pro VA 1-025 CSN is the larger of the pair of slim console fan coils in this batch, with a cooling capacity of 2.61 kW and a heating capacity of up to 2.90 kW. Just like its smaller sibling, the VA 1-015 CSN, it offers an extremely low profile of only 12.6 cm and installation flexibility - vertically at floor level (free-standing on legs or recessed into a niche) or horizontally suspended under the ceiling. Thanks to its elegant design and integrated touch control panel, this unit is particularly popular in new-build design projects where the developer emphasises a compact, unobtrusive appearance of the technology in the interior - according to independent sources, it is a solution "ideal for new builds thanks to its elegant aesthetics and compact design".

Technical parameters of the VA 1-025 CSN

The technical data for this model has also been cross-checked with a foreign retailer, who states almost identical values - cooling capacity 2.6 kW, heating capacity 2.9 kW, maximum airflow 470 m3/h, width 104 cm, depth 12.6 cm and height 58 cm - which confirms the accuracy of the stated parameters. The unit's fan uses high-efficiency modulation (smooth speed control, not just a few fixed steps), which contributes to quieter operation and more precise output control compared to older fan coils with a simple step-controlled fan.

Why choose the aroVAIR pro CSN console fan coil

CSN console fan coils combine the advantages of both wall-mounted and floor-standing solutions. Unlike WN wall-mounted units, which are hung high on the wall as a radiator replacement, CSN units are mounted low near the floor or, conversely, under the ceiling, which allows their use even in spaces with large glazed areas reaching almost to the floor, where there is not enough free wall for classic wall mounting. The integrated touch control panel directly on the unit also eliminates the need to find a location for a separate remote control or wired controller.

Who is the VA 1-025 CSN intended for

This larger model in the CSN series is suitable for medium-sized rooms with a heat loss/load of approximately 2.5-3 kW - larger bedrooms, studies, dining rooms or smaller living rooms in new builds with floor-to-ceiling glazed facades, where a console (low) placement of the unit is practically the only installation option for a fan coil. Thanks to its higher maximum airflow (470 m3/h) compared to the smaller VA 1-015 CSN, it can compensate for temperature fluctuations more quickly during sudden weather changes or after prolonged ventilation.

Installation - floor or ceiling mounting

Just like the smaller model, the VA 1-025 CSN can also be installed vertically at floor level on separately purchased mounting legs (Vaillant VA 1-AF CS) - free-standing against the wall, or recessed into a prepared building niche, where only the front grille and control panel remain visible. Alternatively, horizontal mounting under the ceiling using suspension elements is possible, which is used in spaces with a suspended ceiling or where the floor area needs to remain completely free. The hydraulic connection is made at the rear or side of the casing. To simplify switching between heating and cooling mode, we recommend adding the 3-way switching valve set (Vaillant VA 1-A3WV CS), which simplifies hydraulic integration without the need to design a separate switching valve.

Compatibility with heat sources

CSN console fan coils are designed to work with Vaillant aroTHERM and aroTHERM plus heat pumps (air-to-water), where the low operating temperature of the heating water (typically 35-45 °C) maintains a high COP for the heat pump and simultaneously enables summer cooling by connecting to the chilled water circuit in reverse mode. The unit can also be connected to a Vaillant flexoTHERM heat pump (ground-to-water) or used as a supplementary heating element in a system with a Vaillant ecoTEC or ecoCOMPACT condensing boiler (without the cooling option).

Modbus and integration into the building management system

The VA 1-025 CSN model offers the option of connection via the Modbus communication bus, a standard industrial protocol used in Building Management Systems (BMS). This function is of particular interest for commercial projects, office buildings or larger residential projects with a central heating and cooling control system, where it is necessary to monitor and control a larger number of fan coil units from a single central point, or to integrate their status into a broader building automation system (for example connecting to occupancy sensors that reduce the unit's output when the room is unoccupied).

Aesthetic integration and design

CSN console units have a flat, elegant white casing with a minimalist design that looks modern and unobtrusive even in the more demanding interiors of new-build homes. The integrated touch panel replaces traditional mechanical controls, contributing to a clean visual impression without visible rotary knobs or bulky frames. At a length of 104 cm, the VA 1-025 CSN, when floor-mounted, looks almost like a design plinth under a window rather than a piece of technical equipment.

Maintenance and care

The front panel of the unit conceals a replaceable/washable air filter, which is recommended to be checked and cleaned approximately once every 4-8 weeks during periods of intensive operation; for normal use, checking it once every 2-3 months is sufficient. In cooling mode, it is advisable to check the condensate drain's patency once a year before the start of the summer season, which is especially important for floor-mounted installations, where the correct fall of the drain pipe must be ensured.

Comparison with the smaller VA 1-015 CSN model

The height and depth of both models are identical (580 x 126 mm); only the width of the casing differs, along with the associated capacity - the VA 1-025 CSN is 20 cm wider, which provides a larger heat exchange surface and therefore higher output while maintaining the same low profile. When choosing between the two models for a borderline room size, we recommend choosing the larger model - the capacity reserve means quieter operation at lower speeds for most of the year.

Recommended additional accessories

• 3-way switching valve set Vaillant VA 1-A3WV CS - simplifies hydraulic connection and switching between heating and cooling mode.
• Mounting legs Vaillant VA 1-AF CS - required for vertical (floor) mounting of the unit.

Both accessories are compatible with the entire range of slim console units, including the VA 1-025 CSN and the smaller VA 1-015 CSN.

Frequently asked questions

Summary - why choose the VA 1-025 CSN

The Vaillant aroVAIR pro VA 1-025 CSN combines higher output while maintaining an extremely low profile of 12.6 cm, an elegant design with an integrated touch panel, and installation flexibility (both floor and ceiling mounting). It is an excellent choice for medium-sized rooms in new builds, especially where large glazed areas rule out classic wall mounting of a radiator or fan coil.

Typical deployment scenario

Imagine a new build with a floor-to-ceiling glazed wall in the living room or study - a common architectural feature of modern low-energy houses, which, however, makes classic wall mounting of a radiator or fan coil at height impossible. In such a space, the console unit VA 1-025 CSN, placed at floor level along a shorter section of wall next to the glazing (or recessed directly into a building niche under the windowsill), is practically the only practical solution for providing active heating and cooling in the room. An output of 2.61/2.90 kW covers a typical room with an area of up to approximately 25-30 m2 with standard insulation; for higher heat gains from glazing (for example south-facing orientation), we recommend discussing the exact sizing with a designer.

A second common scenario is horizontal (ceiling-suspended) mounting in commercial premises - offices, showrooms or reception areas - where it is desirable to keep the floor area completely free, with the equipment hidden under the ceiling, possibly in a suspended ceiling with only the front grille visible.

Energy efficiency and operating costs

Like other units in the aroVAIR pro range, the VA 1-025 CSN achieves the highest efficiency when working with a low heating water temperature (35-45 °C) typical of the Vaillant aroTHERM plus heat pump, maximising the COP throughout the heating season. The high-efficiency modulated DC fan also consumes less electrical energy for the same airflow than older AC solutions, especially at partial output, when smooth modulation allows the speed to be precisely adapted to the current need without unnecessary overheating or overcooling of the room.

When ordering, we recommend consulting the exact sizing and hydraulic connection with an authorised Vaillant heat pump installation company, which will also register the equipment and activate the manufacturer's warranty.