Democratizing fresh air for all.
Lüften1 was born from a simple but urgent truth: the air inside our homes — the places we trust most — is often the most polluted.
Our founder discovered this the hard way. His young nephew, living in a tightly sealed apartment, was constantly sick. Despite every healthy habit — handwashing, balanced meals, daily play — the colds kept coming. The hidden culprit? Stale, virus-laden indoor air with nowhere to go.
Modern homes are sealed shut for energy efficiency. But without proper ventilation, moisture, germs, and pollutants build up fast — especially in winter. Opening a window isn’t practical in freezing weather, and central HVAC systems often just recirculate the same stale air.
That’s where Lüften1 comes in.
We designed a compact, energy-efficient, renter-friendly system that delivers continuous fresh air — without renovations, ducts, or noise. Installed directly in a window, Lüften1 brings in outdoor air and exhausts stale indoor air, recovering up to 80% of the heat and humidity that would otherwise be lost.
Every Lüften1 is built with a single mission: to make healthy air accessible — for families, for renters, for everyone.
We’re a small Canadian team with backgrounds in engineering, building science, and product design — but more importantly, we’re people who care deeply about the invisible quality of the spaces we live in.
Because we believe fresh air should never be a luxury.
Frequently Asked Questions
What is Lüften1?
Lüften1 is a window-mounted ventilation unit that brings in fresh outdoor
air and removes stale indoor air — all while keeping most of your heat and
comfort inside.
How is Lüften1 different from a fan or air purifier?
A fan only moves the same air around. An air purifier cleans indoor air but doesn’t bring in anything new. Lüften1 does both — it replaces old air with fresh outdoor air and keeps up to 80% of your warmth and humidity, so your heating or cooling isn’t wasted.
Does Lüften1 require renovations or holes in my wall?
No. It fits directly in a standard window with a soft foam seal — no drilling, no damage, no tools beyond what’s included.
How much energy does Lüften1 use?
Very little. It uses about the same power as a small light bulb, but it saves much more by keeping your heated or cooled air inside instead of losing it out the window.
How quiet is Lüften1?
It’s designed to run quietly. On lower settings, it’s softer than a whisper - perfect for bedrooms and home offices.
What room size is Lüften1 designed for?
One unit comfortably handles a bedroom, office, or small living area up to about 400 square feet. For larger spaces, multiple units can work together.
How often do I need to clean it?
Just remove the front cover by gently pulling (magneticaly attached) and replace the filters regularly. The screen will remind you when it’s time.
Can I use Lüften1 in winter?
Yes. It’s built to handle cold weather without freezing. It automatically adjusts to prevent condensation or frost.
Is Lüften1 suitable for renters?
Yes. It installs and removes easily, leaving no marks — perfect for apartments or temporary setups.
How long does Lüften1 last?
Each unit is built to last for years of continuous use, with replaceable filters and durable components designed for year-round operation.
