The humidifier with power

SKU: K-004
Efficient humidification with low power consumption
Top filling during operation
Controllable via smartphone app
Room size 100m²
Sale price€249,00
In stock
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Enjoy a complimentary aroma diffuser as our thank-you gift with the purchase of this product!

Product information Karl

Powerful yet quiet! Karl is the first of a new generation of efficient humidifiers. Despite his low power consumption, the compact evaporator can humidify large rooms in no time at all. In auto mode, Karl selects the appropriate level of humidification independently so that the desired result can be achieved quickly and economically. And before the water runs out, the water container can be filled from above during operation via a lift-up flap. All humidifier Karl’s functions – including monitoring the current level of humidity – can be conveniently controlled on the device itself or via an app on your smartphone. So, an optimum indoor climate is guaranteed – even when you are out and about. And for undisturbed sleep, Karl’s LED function lights can be dimmed or switched off altogether.

Important purchasing advice

We recommend a more powerful humidifier for Minergie houses (low energy or passive houses) or apartments for which calculations should be based on twice the room size. 

The reason for this lies in the continuous exchange of air: cold and dry outdoor air is heated up and channelled indoors. The moisture produced by people, animals, furniture, plants, cooking, showering, etc. is quickly directed outside by the continuous exchange of air, usually resulting in extremely dry air indoors. Controlled ventilation systems therefore have the same effect as open windows.


Technical data

Karl Sale price€249,00
Karl big
Karl big Sale price€379,00
Karl Sale price€249,00
Karl big
Karl big Sale price€379,00
Product family









Accessories (included)

Water Cube, 2 humidifier filters

Water Cube, 4 humidifier filters

Room size m²



Auto mode

Karl automatically selects the appropriate humidification level in auto mode to reach and maintain the desired humidity quietly and efficiently.

Easy handling

The 4-liter water container can be easily filled through a flap opening on the top, even during operation. When the water container is empty, Karl switches off automatically.

Simple operation

All functions of humidifier Karl can be conveniently controlled on the unit or via Wi-Fi using the Stadler Form app - including monitoring of the current humidity. This ensures an optimal indoor climate at home even when you are on the move.


Review from Michael von Gunten at 07.02.2023


Karl meets our expectations both aesthetically and functionally. In combination with the perfect purchase process and the very fast shipping, this results in an unrestricted purchase recommendation.

Review from Max at 18.11.2022

Viel Power

It's beautiful, but also very powerful. For me, Karl is enough for my entire living room, which is probably 80 square meters. I think it could moisturize even more. The filling opening is rather small and difficult to hit...


The Designer

Since the very start, I have had the privilege to co-develop and design products for Martin Stadler and the Stadler Form Team. What began with Fred, has grown into an attractive, small but fine range of products. This experience, and being part of the team, has greatly enriched myself and my work as a designer ...

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Designed in Switzerland

2 Year Warranty

Fast Shipping

14 Day Return Policy