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According to European test standards the manufacturer claims to its efficiency is 90.6% with moisture recovery at a rate of 20 to 30%.

Integrated MEC together with Lunos offers alternative to conventional HRV systems; Introducing Lunos e2, a ductless, high efficiency, decentralized ventilation devices.


Heat Recovery Ventilators (HRVs) are an essential component of any air-sealed high performance home, bringing in fresh air and removing moisture. An HRV uses the heat in stale exhaust air to warm incoming fresh air. Until now, this has meant a centralized heat transfer core and a network of ducts feeding and drawing air throughout the home.


The LUNOS e² through-wall heat recovery ventilation, allows for very high efficiency heat recovery efficiency, while keeping installation cost to a minimum. The unit is a through wall fan, with a ceramic regenerative heat exchanger behind it. Operating and wired in pairs, these fans provide continuous ventilation without the need for duct-work and are installed directly  in the exterior wall.


The fan’s regenerative core is charged by the oscillation of fan direction. During each cycle, fans take turns exhausting indoor air, which charges the regenerative core. Air flow then reverses and incoming air absorbs the stored heat at 90% tested efficiency.


For more information please visit us at were you will find all the information; technical details and possible applications - and we will be happy to answer any question you may have.

  • specifications




    • Fan length: standard: 9.8” (248mm) short: 6.8” (173mm)
    • Diameter of Unit: 5 7/8” (150mm)
    • Exterior Diameter of Tube: 6 3/8” (163mm)
    • Installation Tube (can be cut): 12″ to 19.5” (300 to 500 mm). Optional 27” (700mm) tube
    • Inside Cover: 7 1/16” x 7 1/16” (180 x 180 mm)
    • Outside Grill Diameter: 7 1/16” (180mm)
    • Ventilation rates: 10/15/20 CFM or 9/18/22CFM
    • Heat recovery efficiency: 90.6% (tested with DIN 308 / DIBt protocol)
    • Humidity recovery: 20-30%
    • Specific fan efficiency: 0.07-0.09 Wh/m3 (0.11-0.14 (W/cfm)
    • Ventilation system efficiency: 0.30 Wh/m3
    • LUNOS e² fans are certified to UL 507-2010: Electric Fans 9th Edition
    • Filter: G3 (MERV 5) or optional pollen F5 (MERV 9-10)
    • Sound levels: 16.5db – 19.5 dB – 26.0 dB
    • Includes one transformer (110V-12V) and controller. Maximum four fans (two pairs) can be wired to one controller.
    • Installation sleeve included – can be pre-installed in wall before insulating/during construction
    • Creating a very quiet heat recovery ventilation system without the need for ducts and balancing, with specific fan efficiency that is second to none.


  • Product description


    Our family of ventilation systems with heat recovery are amazingly efficient and provide fresh air and a pleasant living environment in every room. For supply and exhaust ventilation, all rooms of the apartment or house can be equipped with heat recovery devices.


    For this purpose LUNOS has developed various units: The e² family consisting of the well-known e², the e²mini and e²short, and now the new e²neo. They are preferably installed in living rooms and bedrooms, whereas the ego is employed in exhaust air rooms such as bathrooms and kitchens. Here the brand new Nexxt from LUNOS falls into line. It provides ventilation no longer only for domestic rooms with decentralised systems, but now also hotels, hospitals and schools can be equipped by LUNOS.



  • Downloads


    • Product Brochure - Lunos HRV


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