Flexit Nordic CL3 is a ceiling-mounted central air handling unit from the Norwegian Nordic series — designed for installation in suspended ceilings or cold attics with an ultra-low building height of under 30 cm. The rotary heat exchanger delivers a thermal efficiency of up to 85%, airflow up to 328 m³/h and a built-in humidity sensor with full control via the Flexit GO app. Duct connection Ø160 mm. Available in right-hand (RER) and left-hand (REL) configurations. The ideal solution for larger homes and apartments up to 180 m² — the unit hides discreetly in the ceiling, taking up zero living space.
Key Benefits
Smart Control via Flexit GO
Control the unit from anywhere via the mobile app or web interface. Modbus support enables integration with smart home systems. The optional NordicPanel provides convenient local control.
Ceiling Installation with Ø160 mm Ducts
The unit is designed for installation in suspended ceilings or cold attics. With a building height of under 30 cm, it fits even in tight spaces. Configurable door solution for easy maintenance. Available in left- and right-hand configurations.
Kitchen Hood Connection
Simple bypass duct connection (Ø125 mm) for kitchen range hoods. Supports efficient extraction of cooking vapours directly through the central heat recovery system.
Healthier Air Throughout Your Home
Dual-stage F7 filtration removes fine dust, pollen and allergens. Heat recovery eliminates excess moisture and CO₂, reducing the risk of mould growth and respiratory issues.
Why a ceiling-mounted air handling unit?
The Flexit Nordic CL3 is specifically designed for ceiling or cold attic installation. With a building height of under 30 cm, it is one of the most compact central air handling units on the market. Unlike wall-mounted models (Nordic S3/S4), it takes up zero living space and remains completely hidden in the ceiling. Compared to the smaller CL2, the CL3 offers higher airflow up to 328 m³/h and a more powerful electric heater (500 W), making it the right choice for larger homes and apartments up to 180 m².
The rotary heat exchanger delivers higher heat recovery efficiency in cold climates. Seasonal heat recovery — both summer cooling and winter heating — is a standard feature of the Nordic series. For operation in freezing conditions, the Flexit GO app offers a defrost function that prevents ice build-up and guarantees reliable year-round performance.
Annual Energy Savings
Flexit Nordic CL3 significantly reduces heating costs thanks to the high efficiency of its rotary heat exchanger. Indicative annual savings by climate zone:
(e.g. Scandinavia, alpine regions)
(e.g. Central Europe)
(e.g. Mediterranean region)
Technical Specifications
| Parameter | Value |
|---|---|
| Heat exchanger thermal efficiency | up to 85% |
| Max. airflow | 328 m³/h (91 l/s) |
| Heat exchanger type | Rotary (enthalpy) |
| Energy class | A |
| Recommended area | up to 180 m² |
| Filter class | 2× ePM1 55% (F7) |
| Filter dimensions | 290×230×48 mm |
| Sound power level | < 35 dB(A) at 10 m² Sabine |
| Rated voltage | 230 V / 50 Hz |
| Rated power (total) | 679 W |
| Fan power | 2×83 W |
| Electric heater power | 500 W |
| Rotor motor power | 4 W |
| Rated current | 3.9 A |
| Fuse | 10 A |
| Fan type | B-wheel, 0–10 V control |
| Duct connection | Ø160 mm |
| Kitchen hood connection | Ø125 mm |
| Dimensions (W×H×D) | 1,160×700×296 mm |
| Building height | < 300 mm |
| Weight | 58 kg |
| Colour | White, RAL 9016 |
| Control | Flexit GO (LAN, cloud, app) |
| Compatibility | Modbus, Flexit GO, NordicPanel (optional) |
| Installation | Ceiling (suspended ceiling / cold attic) |
| Certification | Eurovent, Nordic Swan Ecolabel |
| Configuration | Right-hand (RER) / Left-hand (REL) |
Flexit Nordic CL3 vs CL2 — which model to choose?
The Nordic CL3 is a ceiling-mounted air handling unit with airflow up to 328 m³/h, designed for larger homes and apartments up to 180 m². Compared to the smaller Flexit Nordic CL2 (271 m³/h, up to 80 m²), it offers higher airflow capacity and a more powerful electric heater (500 vs 350 W). All Nordic models share the same rotary heat exchanger with 85% efficiency, Flexit GO control and F7 filtration.
For smaller spaces with ceiling installation, the Flexit Nordic CL2 is the right fit. If you prefer wall mounting, take a look at the Flexit Nordic S3 or Flexit Nordic S4.
Powerful. Quiet. Hidden in the ceiling.
Flexit Nordic CL3 is the ideal ceiling-mounted air handling unit for larger homes and apartments up to 180 m². Ultra-low profile under 30 cm, exceptional quietness and smart control via Flexit GO — available in right-hand (RER) and left-hand (REL) configurations.
| Model (Exterior side) | REL (Left) or RER (Right) |
| Brand | Flexit |
| Max. air flow m³/h | 331 m³/h |