Flexit ProNordic L150R is a commercial air handling unit from the Norwegian ProNordic range — designed for schools, offices, retail spaces, fitness centres and apartment buildings. With a maximum airflow of up to 1 850 m³/h (at 200 Pa) and a circular side duct connection of Ø315 mm, it offers exceptional installation flexibility regardless of technical room layout. Thanks to its compact dimensions (1 230×1 130×910 mm) and a net weight of only 88 kg, the unit is easy to transport and fits through a 90 cm doorway. The Siemens Climatix CS2500 control system with Modbus communication ensures simple integration into building management systems (BMS). Supplied as a right-hand variant with 400 V configuration, easily convertible to left-hand and 230 V directly on site — making it impossible to order the wrong variant.
Key Benefits
Performance Parameters
Flexit ProNordic L150R delivers an airflow of up to 1 850 m³/h at 200 Pa (SFP <2.0). At a lower setting (SFP <1.5), it achieves 1 150 m³/h with higher heat recovery efficiency (>86 %). The circular side duct connection Ø315 mm allows optimal duct routing even in space-constrained installations.
@ 200 Pa (SFP <2.0)
(circular, side-mounted)
Siemens Climatix CS2500 control system
Integrated control system with constant airflow or 3-speed regulation. Modbus TCP/IP or RTU communication for connection to building management systems (BMS). ProPanel (push-button) or ProTouch (touch-screen display, Android) control panel available as an accessory. Optional BACnet IP module for extended integration into various BMS platforms.
Flexible design — impossible to order wrong
Supplied as a right-hand variant with 3N~400 V configuration. Conversion to left-hand and 230 V is done directly on site. The heating coil (electric 4 800 W or water-based) is installed on site. This flexibility eliminates the risk of ordering the wrong variant and saves costs when project changes occur. The unit is lagerführt — available from stock.
Commercial buildings — offices, schools, retail
With an airflow of up to 1 850 m³/h, ProNordic L150R is ideal for collective ventilation of apartment buildings, school facilities, retail spaces, fitness centres and medium-sized office buildings. The side connection Ø315 mm opens installation possibilities even where top duct connection is not feasible.
Robust construction — Nordic Swan Ecolabel
Double-walled panels with thermal insulation and no thermal bridges ensure excellent thermal efficiency. High-quality ePM1 55 % (F7) filtration on both supply and extract air captures fine dust and pollen.
Easy installation and servicing
ProNordic L150R is designed with a focus on efficient installation and maintenance. All air connections are located on the side of the unit (circular connection Ø315 mm), enabling optimal duct connection even in rooms with limited ceiling height or overhead obstructions.
The unit can be disassembled into individual modules — rotor module (53 kg), fans (2×9 kg) and doors (2×16 kg) — reducing the net weight for transport to 88 kg. Compact dimensions of 1 230×1 130 mm allow the unit to be carried through a 90 cm doorway.
Automatic bypass provides free cooling during transitional periods. Filter alarm based on pressure differential alerts when filter replacement is needed.
ProPanel and ProTouch — two control options
ProPanel is a standard push-button control panel for basic operation and unit status overview. Suitable where simple control without advanced settings is sufficient.
ProTouch is a Siemens touch-screen panel (Android) with an application for local connection to the unit. It offers extended settings, visualisation of operating parameters and alarm history. Both panels are supplied separately as accessories.
Technical Specifications
| Parameter | Value |
|---|---|
| Max. airflow (SFP <2.0) | 1 850 m³/h @ 200 Pa |
| Airflow (SFP <1.5) | 1 150 m³/h @ 200 Pa |
| Heat recovery efficiency | >83 % at 1 850 m³/h; >86 % at 1 150 m³/h |
| Heat exchanger type | Rotary (regenerative) |
| Fan type | B-wheel radial with EC motors |
| Fan power | 2×500 W (230 V) |
| Rotor motor power | 40 W |
| Max. fan speed | 3 000 rpm |
| Electric heating coil (optional) | 4 800 W |
| Water heating coil | Optional (on-site installation) |
| Rated voltage | 3N~400 V / 50 Hz (convertible to 230 V) |
| Total power (with electric coil) | 6 010 W |
| Total power (with water coil) | 1 210 W |
| Rated current (electric coil, 400 V) | 10 A |
| Fuse rating (electric coil) | 3×16 A |
| Duct connection | Ø315 mm (circular, side-mounted) |
| Filters | Compact ePM1 55 % (F7), 795×380×85 mm |
| Control system | Siemens Climatix CS2500 |
| Communication | Modbus TCP/IP or RTU |
| Fan regulation | ModBus (constant airflow / 3 speeds) |
| Dimensions (W×H×D) | 1 230×1 130×910 mm |
| Depth without doors | 795 mm |
| Gross weight | 191 kg |
| Net weight (transport) | 88 kg (fits through 90 cm door) |
| Rotor module weight | 53 kg |
| Fan weight | 2×9 kg |
| Door weight | 2×16 kg |
| Configuration | Right-hand (convertible to left-hand on site) |
| Installation | Floor-mounted, indoor installation |
| Control panels | ProPanel (push-button) / ProTouch (touch-screen, Siemens Android) |
| Certifications | Nordic Swan Ecolabel eligible |
| Product no. | 151400 |
| GTIN | 7023671514006 |
ProNordic L150R vs S180R — what sets them apart?
ProNordic L150R — max. 1 850 m³/h at 200 Pa. Side circular connection Ø315 mm — ideal for installations where top duct connection is not possible. More compact (1 230×1 130×910 mm), lighter (191 kg, net 88 kg), fits through a 90 cm door. Best suited for spaces with limited ceiling height or side-routed ductwork.
ProNordic S180R — max. 1 800 m³/h at 200 Pa. Top rectangular connection 500×250 mm — standard solution for HVAC systems with overhead duct runs. Larger and heavier (1 630×1 320×1 030 mm, 265 kg, net 143 kg), fits through an 80 cm door. Recommended for typical installations with ceiling duct distribution.
For larger spaces, consider ProNordic S220R (up to 2 400 m³/h). For residential use (family homes), we recommend the Flexit Nordic range — models Nordic S4 (461 m³/h) or Nordic L6 SW (657 m³/h).
Compact commercial ventilation. Side connection. Professional control.
Flexit ProNordic L150R is an energy-efficient air handling unit with a rotary heat exchanger, airflow of up to 1 850 m³/h, circular side connection Ø315 mm and Siemens Climatix CS2500 control — flexible, compact and in stock.