A rule of thumb for ensuring a good indoor environment is that the air in your home should be replaced every two hours. It is necessary to establish an interaction between supply air, exhaust air and air circulating between rooms. We guide you to a good indoor environment, so that you can feel good in your home.
Fresh air IN · Air circulating BETWEEN rooms · Air OUT of the home
It is often possible for you to solve ventilation problems yourself. In order to select the correct solution and product, it is important that you know which TYPE of ventilation is installed in your home: natural draught, mechanical supply or mechanical supply/exhaust. In order to achieve good ventilation, it is important that you know HOW the air circulates throughout your home: supply air, exhaust air and the often overlooked air circulating between rooms.
Natural draft
- homes built before 1970
Natural draft ventilation was common in homes built before the 1970s. This principle is based on the difference between the indoor and outdoor temperature and its function therefore varies greatly depending on the season. Building renovations, additional insulation, heating system replacement and window replacement can also affect natural draft ventilation.
Problems and proposed solutions for homes with natural draft ventilation:
Poor air exchange during the summer months
Natural draft ventilation may then need to be reinforced with extraction fans. Learn more about exhaust air here.
Poor air circulation between rooms
Insufficient air circulation between rooms, what we call transferred air, can often be remedied by air vents and/or ventilation grilles. Learn more in the section on air circulation between rooms.
Mechanical exhaust air
- homes built from 1980 onwards
Mechanical exhaust ventilation is common in buildings built from 1980 onwards. The principle is the same as natural draft ventilation except that air is drawn out using extraction fans. These fans are linked to a system of ducts and can be located in the attic, oven hood or a hood on the roof.
Problems and proposed solutions for homes with mechanical exhaust ventilation:
Dry or stale air
These problems are often due to having too few air vents installed in the room. It may also sometimes be necessary to check the settings of existing fans. Learn more in the section on bedrooms and living rooms.
Mechanical supply/exhaust air
- Homes built from 1980 onward
Mechanical supply/exhaust ventilation is common in buildings built from 1980 onwards. A mechanical supply/exhaust air system with a heat exchanger to recycle heat adds and subtracts exactly the right amount of air in the home. You are provided with a perfectly balanced indoor climate and can also save energy, as much as 8,000 kWh/year*.
(*source: Swedish Energy Agency)
Problems and proposed solutions for homes with mechanical supply/exhaust ventilation:
Poor air quality or insufficient circulation
If problems arise despite having a mechanical ventilation system installed in your home, you may need to check the settings of the plant. You also need to be careful to change filters regularly and clean ducts.
