Breathe Better. Live Smarter.

Poor ventilation can cause a buildup of dust particles, allergens, and mold in your home. This affects everyone—but especially children, who have developing immune systems and breathe more frequently than adults.

High levels of carbon dioxide (CO₂) indoors can lead to tiredness, poor sleep, and difficulties concentrating or learning. Mold exposure can irritate your airways and may trigger asthma or allergies.

Long-term exposure to bad air and lack of fresh airflow can weaken your immune system and negatively impact your overall well-being and quality of life.

Ventilation is essential for keeping indoor air fresh, dry, and healthy. If you notice condensation on windows, feel that the air is stuffy, or smell mustiness, it may be a sign of poor ventilation.

Other warning signs include waking up with headaches or feeling tired in the morning. These symptoms often mean your system isn’t supplying enough fresh air or removing moisture and pollutants effectively.

In some rooms, the need for a good ventilation system is greater than in others.

This includes your bathroom, where humid air can cause a range of issues. A less obvious example is your bedroom, where the air quality has a major impact on your sleep, and where CO₂ levels can rise pretty quickly due to the air you breathe out at night.

It's also a good idea to fit an extraction system for humidity, CO₂ and odours in other wet rooms such as the toilet (odours), the kitchen (odours, humidity, CO₂) and basement (humidity).

On the other hand, you'll need to ensure a supply of fresh air from outside in so-called 'dry' rooms, such as your living room and bedrooms, to replace the polluted indoor air that is extracted via the wet rooms.

Think of it as cruise control for fresh air. Tiny sensors track CO₂, humidity and odours in your home. When the air is already good the system idles, saving energy and noise; the moment cooking steam, shower moisture or extra people appear, it automatically ramps up  until the air is fresh again - then powers back down.

No dials, no guess-work.

With Healthbox's SmartZone technology. Up to 11 separate rooms can be monitored and ventilated individually, the system “follows” your family around the house.

Because the fan rarely runs at full blast. Renson’s Healthbox 3.0, for example, can cut heating losses by up to 60 % compared with a fixed-speed system.

Independent research on residential demand-controlled ventilation shows similar figures (in energy-use reduction) across many studies. 

Less wasted warm air = lower utility bills and a smaller carbon footprint.

A properly insulated home stops the heat from getting out — but in doing so, it also stops polluted air from getting out. For that reason, proper ventilation is more important than ever before to create a healthy indoor climate.

Renson is going one step further by offering demand-driven solutions. These systems constantly monitor the air quality via built in sensors and automatically spring into action only where and when needed. From your breakfast and morning shower to your evening watching TV and a healthy night’s sleep: Renson is your partner for healthy and comfortable living.

The free app lets you see air-quality history, tweak settings or use extra features such as the Night Breeze cooling mode etc.

However, the systems are fully automatic and doesnt need any actions from the homeowner in order to deliver healthy fresh air 24/7. Using the app is fully optional.