The RAIS Nexo 140 Bio Bioethanol Fireplace combines a tall architectural form with the convenience and flexibility of automated bioethanol operation. Defined by its strict cubic design, sharp lines and precise proportions, it creates a strong contemporary focal point for modern living spaces.
At 1425mm high, the Nexo 140 Bio has a more imposing vertical presence than the shorter models in the range. This makes it particularly well suited to larger rooms, open-plan layouts and interiors with higher ceilings where a more substantial fireplace design is required.
The fireplace requires no chimney or permanent fixed installation, giving greater freedom when choosing its position within a suitable room. It can be repositioned when necessary, although a grounded 230V electrical connection is required to power the automated ignition, controls and integrated monitoring system.
The electronically controlled burner provides an adjustable heat output from 1.6kW to 3.4kW, together with a 2.5kW ECO mode. This allows the flame and heat level to be adapted depending on whether the fireplace is being used mainly for ambience or to provide more noticeable warmth.
A generous 7.8-litre fuel tank provides an estimated burn time of up to 31 hours, depending on the selected output level. This extended operating time reduces the need for frequent refilling and makes the appliance practical for both regular use and occasional entertaining.
Controlled operation is supported by an integrated monitoring system that manages ignition, operation and refuelling. If an irregularity is detected, the fireplace shuts down automatically and requires a reset before it can be restarted. This provides a more managed operating experience than a basic manually filled bioethanol burner.
The appearance of the flame can be customised using decorative elements within the combustion chamber. Ceramic logs create a more traditional firewood-inspired look, while decorative glass or stones produce a cleaner and more minimalist expression. Each option is designed to complement the fireplace and integrate naturally with its precise architectural styling.
Further personalisation is available through a choice of six colours, premium handle options and either a steel or glass door. This allows the Nexo 140 Bio to be tailored to suit a wide range of contemporary interiors.
With its tall proportions, automated operation and flexible flueless design, the RAIS Nexo 140 Bio is an excellent choice for customers wanting a commanding real-flame fireplace with a clean, structured appearance.
Key Features
- Tall freestanding bioethanol fireplace
- Strict cubic design
- Sharp architectural lines
- 1425mm overall height
- No chimney required
- No permanent fixed installation required
- Can be repositioned when necessary
- Automated electronic burner
- Integrated ignition and safety monitoring
- Automatic shutdown if irregularities are detected
- Adjustable heat output
- Maximum output of 3.4kW
- Minimum output of 1.6kW
- 2.5kW ECO operating mode
- Up to 31 hours estimated burn time
- 7.8-litre fuel tank
- Suitable for rooms from 34m²
- Choice of six colours
- Choice of premium handles
- Steel or glass door options
- Decorative logs, glass or stone options
- Requires a grounded 230V electrical supply
Expert Insight
The Nexo 140 Bio is a strong choice where the clean cubic design of the Nexo range is wanted with greater vertical scale. It offers the same burner performance and customisation options as the shorter models but creates a more architectural presence in larger rooms.
Suitability
The RAIS Nexo 140 Bio Bioethanol Fireplace is well suited to larger contemporary living rooms, open-plan interiors, high-ceilinged spaces, apartments, and design-led rooms requiring a tall real-flame focal point without a conventional chimney or fixed flue system. The manufacturer specifies a minimum approved room size of 34m².
Installation / Technical Notes
The RAIS Nexo 140 Bio is a freestanding bioethanol fireplace requiring no chimney or permanent fixed installation. A 230V grounded electrical supply is required for ignition, controls and integrated system monitoring.
The supplied dimensions are understood as:
Height: 1425mm
Width: 446mm
Depth: 398mm
Technical performance:
- Minimum heat output: 1.6kW
- ECO heat output: 2.5kW
- Maximum heat output: 3.4kW
- Fuel tank capacity: 7.8 litres
- Estimated burn time: up to 31 hours
- Minimum approved room size: 34m²
- Recommended fuel: bioethanol with 96.5–97.5% purity
Only the manufacturer-recommended bioethanol should be used. Ventilation, refuelling, positioning and clearance requirements must follow the current RAIS installation and operating instructions.












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