• Thermostat-controlled fresh air ventilator for optimum ventilation

    Our self-regulating and thermostat-controlled fresh air ventilators are perfect for all types of homes and premises and provide a healthy all-year round indoor climate.


Products for a better indoor climate – all year round.
Treat your house to self-regulating fresh air ventilators.

Improved indoor ventilation with self-regulating ventilators

Our popular and energy-saving fresh air ventilator is suitable for all ventilation systems. The ventilator is self-regulating and adjusts the air flow in relation to the outdoor temperature. This gives the right ventilation all year round and saves energy by not over-regulating. As no electrical installation is needed, the ventilator is easy to install and is suitable for all types of rooms and premises. It has a neat and stylish design which allows it to fit into any environment.

All ventilators can be purchased directly from our website.


For more information and ordering

The ventilator opens and closes by 1.1 mm for
each degree C the outdoor temperature changes.

Forget all cords and controls

Change to self-regulating!

There are several reasons to replace your old wall ventilators by self-regulating fresh air ventilators and forget all cords and controls.

  • Gives better indoor air all year round
  • Allows your house to breathe and reduces the risk of mildew in the walls
  • Minimises over-ventilation
  • Energy saving = better for both the environment and your wallet
  • Discrete and stylish design
  • No electrical installation, which makes the ventilator easy to install

About us

Här ser vi en tilluftsventil från Liljengrens

About us

Liljengrens Product AB is a leading supplier and manufacturer of self-regulating fresh air ventilators that regulate (open/close) in relation to the outdoor temperature. This gives optimum ventilation throughout the year.


Shop online or in our store

All our products are in stock and can be purchased from the website or our store at Lilla Marieholmsgatan 4, Göteborg.


How many ventilators do I need in each room? Can I install your ventilators in existing holes? Where do I best install the ventilators for optimum functionality? We answer the most common questions here.

We provide a 10-year warranty for our thermostat bulb.

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