LUNOS Nexxt Decentralised ERV Systems

LUNOS built its reputation as a global leader in decentralised ventilation with the success of the e² system, and has further expanded the possibilities of decentralised design with the introduction of the Nexxt. Designed for applications requiring higher airflow, improved acoustic performance, and reliable operation, the Nexxt delivers efficient ventilation without the need for ducted systems.

The LUNOS Nexxt is suitable for residential use in homes and apartments, as well as a wide range of commercial and institutional settings including kindergartens, schools, offices, hotels, and healthcare environments.

The Nexxt is particularly well suited to installations exposed to high wind loads or where additional sound insulation is required. Its construction and operating characteristics make it ideal for buildings where conventional decentralised units may struggle with pressure fluctuations or external noise intrusion.

When fitted with the optional F9 filter, the system exceeds hygiene and indoor air quality standards many times over, making it an excellent solution for sensitive or high-occupancy spaces.

The LUNOS Nexxt-E is a decentralised energy recovery ventilation (ERV) unit achieving heat recovery efficiency of up to 85%. Heat and moisture transfer is carried out via a high-performance enthalpy heat exchanger, helping to maintain comfortable indoor conditions while reducing heating and cooling losses.

Despite its high airflow capability, the Nexxt-E is extremely energy efficient. Power consumption starts from as little as 5 W, while airflow rates exceeding 100 m³/h can be achieved, making it suitable for larger rooms and higher ventilation demands.

As standard, the Nexxt-E introduces an advanced operating concept based on integrated humidity and temperature sensors. The system automatically adapts ventilation rates to indoor conditions, ensuring consistent air quality while minimising energy use and user intervention.

This demand-controlled operation makes the Nexxt-E particularly well suited to modern, well-sealed buildings where ventilation needs vary throughout the day.

• Homes and apartments
• Classrooms and childcare facilities
• Offices and meeting rooms
• Hotels and short-stay accommodation
• Healthcare and sensitive environments

The radial EC motors used in the Nexxt-E drive market-leading centrifugal fans designed for exceptionally quiet operation. Housed within a flow-optimised EPP (expanded polypropylene) chassis, the already low-noise EC motors are further acoustically dampened, effectively “silencing” the fan assembly. As a result, the Nexxt-E is among the quietest decentralised ventilation units in its class.

By design, smaller, lower-power fans generate significantly less noise than the larger, higher-output fans used in centralised ducted systems, making decentralised solutions like the Nexxt-E particularly well suited to noise-sensitive environments.

Thanks to its intelligent internal design and acoustic baffling, the Nexxt-E achieves a maximum sound attenuation of up to 56 dB. This allows the unit to be used effectively in locations exposed to high external noise levels, including demanding environments such as buildings near airports.

Thanks to its extremely low power consumption, the Nexxt-E delivers outstanding energy efficiency, making an active contribution to reducing environmental impact. High-efficiency EC motor technology enables precise airflow control with minimal electrical demand, while the ductless design results in inherently low pressure losses. This allows the system to operate with smaller, lower-power fans, further improving overall efficiency compared to conventional ducted ventilation systems.

At the heart of the Nexxt-E is an integrated enthalpy heat exchanger, delivering heat recovery efficiencies of up to 85% (73% in accordance with EN 13141-8 at 77 m³/h). The unit’s integrated control system ensures precise coordination of all components, optimising performance under varying conditions.

Built-in humidity and temperature sensors enable fully automatic, demand-controlled operation, providing effective ventilation while helping to protect against excess moisture. Optional additional sensors, such as CO₂ sensors, can also be integrated to further enhance air quality control.

The Nexxt-E can be installed either flush-mounted or surface-mounted, with the core system components remaining the same for both installation types. All standard components are common to both configurations. The only additional component required for a surface-mounted installation is the surface-mounting set, which allows the unit to be mounted directly onto the wall.

For flush-mounted installations, a minimum wall thickness of 280 mm is required to fully accommodate the unit within the wall. For surface-mounted installations, only 110 mm of wall thickness is required, which is among the narrowest requirements for decentralised ventilation systems.

Retrofit Ready

With no complex ducting runs required, decentralised systems are quick and straightforward to install, making them ideal for retrofit applications.

Compact Design

Decentralised systems are an excellent solution where building layouts do not allow space for a large centralised ventilation unit.

Versatility

Individual units can be installed exactly where ventilation is needed, even in areas where ducting cannot practically be routed.

Redundancy

Because each unit operates independently, the system continues to function even if one unit is offline, ensuring ongoing ventilation and resilience.

• LUNOS Nexxt Brochure.
• LUNOS Nexxt User Manual.