At its heart lies a meticulously engineered, high-efficiency aluminum energy core where the transformation happens: stale indoor air passes through one side as it leaves your home, transferring its heat and gentle moisture across a thin, specialized membrane to the clean, incoming air. The two air streams never mix — only their energy does — creating a continuous, simultaneous flow of fresh and exhaust air, a first of its kind in a compact, window-mounted design.

  • Quick and Easy Instalation

    Lüften1 installs in minutes using a flexible closed-cell foam collar that seals tightly without tools or damage. The soft foam adapts to window frames of different shapes, keeping air leaks and vibrations out.
  • Integrated MERV 7 Filter

    Lüften1 uses high-performance MERV 7 filters on both the intake and exhaust sides to keep your air and the unit clean. These filters capture dust, pollen, and fine particles that typical window fans or vents let through.
  • Indoor Humidity Control

    Balanced ventilation systems such as ERVs and HRVs help reduce the risk of mold growth by continuously replacing humid, stagnant indoor air with fresh outdoor air, making it harder for mold and mildew to thrive.
  • Fully Automated System

    Lüften1’s intelligent control system automatically balances airflow for comfort, efficiency, and safety. It continuously monitors temperature and humidity to prevent condensation inside the heat exchanger.
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Disclaimers

Lüften1 is designed to deliver fresh, filtered outdoor air while exhausting stale indoor air through a crossflow energy recovery core. Performance is based on internal testing under typical residential conditions. Actual results may vary depending on climate, room size, installation quality, and building airtightness.
Lüften1 improves indoor air quality by exchanging stale air with filtered outdoor air. It includes a MERV-7 filter that captures common household particles such as dust and pollen, but it is not a medical or HEPA-grade air purifier. Lüften1 does not eliminate airborne viruses, bacteria, or allergens; instead, it supports healthier air by increasing ventilation and reducing the buildup of indoor pollutants.
Lüften1 uses internal software logic to help prevent condensation and frost. However, in extreme humidity or cold—especially with poor window sealing or improper installation—condensation risk may increase. Always follow installation and operating guidelines in the user manual.
Efficiency values (up to 80%) are based on internal calculations using specifications from the Recutech plate heat exchanger. Real-world performance depends on ambient conditions and fan speed. Suggested room coverage is based on achieving approximately 0.35–0.5 air changes per hour (ACH) in an 8-foot-ceiling room. Actual results vary with fan setting, window fit, and room volume.
Lüften1 is intended for single-room applications and is not a replacement for central HVAC systems or dehumidifiers. It is best suited for bedrooms, offices, or studio-size spaces. Product design, specifications, and performance data are subject to change without notice. Appearance may differ slightly between production units.