The quality of the air you breathe has a major influence on how you feel. Thanks to fresh, oxygen-rich air, you sleep better and can concentrate better. That is why sufficient ventilation is important. A good ventilation system balances 'health', 'energy efficiency' and 'comfort'; good for your home and good for you.
Step into our Zehnder world and experience what a healthy indoor climate means.
There is no installation in the house that ensures the supply or exhaust of air. The air quality in your home is therefore highly dependent on the frequency with which doors and windows are open.
Ventilation, Natural ventilation, System A
+ No purchase costs or maintenance
- High energy costs
- Indoor air quality is often inadequate
- Risk of noise pollution, drafts, vermin
- Too warm air in summer, too cold air in winter
With mechanical ventilation, polluted air is extracted through ducts from the bathroom, toilet, kitchen and storage room. The ventilation unit is often located in the attic or on the roof. Fresh air enters through grilles in windows or doors.
System C, Pipe fan, Roof fan, Ventilation box, Residential fan
+ Low purchase costs, minimal maintenance, long lifespan
+ Takes up little space
+ Better air quality, provided window grilles are open
- High energy costs for heating or cooling
- Can lead to comfort complaints such as drafts
Decentralized ventilation provides one room of a home with fresh air. The ventilation unit is installed directly in the outside wall of, for example, the bedroom or study room. The heat or cold that is already present in the room is reused.
Local ventilation, Decentralized heat recovery (heat recovery)
+ No complete duct system required
+ Lower energy costs thanks to WTW
+ Better air quality and more comfort thanks to air filter
- Limited to one room
- Outdoor part in the facade necessary
With OverFlow ventilation, the mechanical ventilation box in the attic is replaced by a heat recovery unit. This measures air quality and removes polluted air through existing ducts. Fresh air flows via new supply ducts from the attic to the 1st floor and then via the landing to the ground floor.
OverFlow Technology, Overflow ventilation
+ Proven better air quality throughout the home
+ Less material required
+ Lower energy bill compared to mechanical ventilation
- Slightly delayed operation compared to direct air supply
- Only suitable for renovation
One unit ventilates the entire home. With an air distribution system, the air is supplied and extracted to the right place. The heat or cold that is already present in the house is reused. This maintains a pleasant indoor temperature and saves energy.
System D, Heat Recovery, Balance Ventilation
+ Direct supply; Sufficient fresh air is guaranteed everywhere in the house
+ Optimal comfort
+ Fully automatic and fast operation
+ Suitable for new construction and zoned ventilation
- No active cooling or heating
Climate control is the combination of ventilation, cooling and heating in one system. As an extension to a central heat recovery unit, it provides active cooling or heating of the supply air. The system balances health, comfort and energy efficiency.
ClimateSwitch, Total system, indoor climate solution
+ Sustainable, healthy way to prevent overheating in the home
+ Maximum energy efficiency in all seasons
+ Extra comfort through balanced humidity
- Installations take up more space
- Higher purchase costs
There is no installation in the house that ensures the supply or exhaust of air. The air quality in your home is therefore highly dependent on the frequency with which doors and windows are open.
Ventilation, Natural ventilation, System A
+ No purchase costs or maintenance
- High energy costs
- Indoor air quality is often inadequate
- Risk of noise pollution, drafts, vermin
- Too warm air in summer, too cold air in winter
With mechanical ventilation, polluted air is extracted through ducts from the bathroom, toilet, kitchen and storage room. The ventilation unit is often located in the attic or on the roof. Fresh air enters through grilles in windows or doors.
System C, Pipe fan, Roof fan, Ventilation box, Residential fan
+ Low purchase costs, minimal maintenance, long lifespan
+ Takes up little space
+ Better air quality, provided window grilles are open
- High energy costs for heating or cooling
- Can lead to comfort complaints such as drafts
Decentralized ventilation provides one room of a home with fresh air. The ventilation unit is installed directly in the outside wall of, for example, the bedroom or study room. The heat or cold that is already present in the room is reused.
Local ventilation, Decentralized heat recovery (heat recovery)
+ No complete duct system required
+ Lower energy costs thanks to WTW
+ Better air quality and more comfort thanks to air filter
- Limited to one room
- Outdoor part in the facade necessary
With OverFlow ventilation, the mechanical ventilation box in the attic is replaced by a heat recovery unit. This measures air quality and removes polluted air through existing ducts. Fresh air flows via new supply ducts from the attic to the 1st floor and then via the landing to the ground floor.
OverFlow Technology, Overflow ventilation
+ Proven better air quality throughout the home
+ Less material required
+ Lower energy bill compared to mechanical ventilation
- Slightly delayed operation compared to direct air supply
- Only suitable for renovation
One unit ventilates the entire home. With an air distribution system, the air is supplied and extracted to the right place. The heat or cold that is already present in the house is reused. This maintains a pleasant indoor temperature and saves energy.
System D, Heat Recovery, Balance Ventilation
+ Direct supply; Sufficient fresh air is guaranteed everywhere in the house
+ Optimal comfort
+ Fully automatic and fast operation
+ Suitable for new construction and zoned ventilation
- No active cooling or heating
Climate control is the combination of ventilation, cooling and heating in one system. As an extension to a central heat recovery unit, it provides active cooling or heating of the supply air. The system balances health, comfort and energy efficiency.
ClimateSwitch, Total system, indoor climate solution
+ Sustainable, healthy way to prevent overheating in the home
+ Maximum energy efficiency in all seasons
+ Extra comfort through balanced humidity
- Installations take up more space
- Higher purchase costs
Costs of a ventilation system are highly dependent on the type of ventilation system you choose. Often the following applies; the larger the investment, the more you earn back on energy costs. With an extensive heat recovery system with cooling, you need less energy to cool and heat your home. The investment will therefore pay for itself over the years.
Are you going to replace an existing ventilation system with a new one? There is a good chance that the new system will use up to 80% less energy. In addition, replacement is cheaper than installing a completely new system because air ducts are already present.
Depending on the localisation, this also results in different costs for the purchase and installation. We will be happy to advise you!
Have you chosen a type of ventilation system? An installer will help you further and give you tailor-made advice for your living situation.
It's time! The ventilation system is being installed. It starts with the roof penetrations and the collapsing or laying of the air distribution ducts. The ducts ensure that clean air is transported or extracted to the rooms.
The controls are also installed. For example, CO2 sensors in the bedrooms and living room and a timer in the bathroom. These controls let the unit know when to ventilate so that there is always clean air.
Find an installer or contact person and discuss your wishes. They can check whether it is possible. With new construction there is often room for all your wishes. If you are going to renovate, the feasibility of your wishes will be taken into account.
When you decidied for an installern, an intake interview with the installer follows. If desired, the installer will contact Zehnder for advice and a ventilation calculation. The ventilation calculation shows which unit and controls are suitable for your needs and the size of the house. This way you get the best advice for a quiet and balanced ventilation system. Based on this calculation and your wishes, the installer will make a quote.
If you are an installer, we have a great calculation tool- just contact us >
The installer starts with the preparations for your home. He or she orders the right materials and ensures that everything is delivered on time.
It's time! The ventilation system is being installed. It starts with the roof penetrations and the collapsing or laying of the air distribution ducts. The ducts ensure that clean air is transported or extracted to the rooms.
The controls are also installed. For example, CO2 sensors in the bedrooms and living room and a timer in the bathroom. These controls let the unit know when to ventilate so that there is always clean air.
The ventilation system is in place and the ducts are connected to it. Now it's time to arrange everything. This is what the installer or Zehnder indoor climate expert does. During adjustment, the ventilation calculation is taken into account and the valves in the rooms are adjusted to the required amount of air (depending on the size of the room).
The settings are adjusted on the unit so that the system is balanced and works as desired.
Finally, the ventilation system must be maintained. With a heat recovery system, the filters must be replaced every six months. You can easily replace filters yourself. Just contact your local installer. We also recommend having the ventilation system regularly checked.
With mechanical ventilation, we recommend having the ventilation system checked every 2 years.
It's time! The ventilation system is being installed. It starts with the roof penetrations and the collapsing or laying of the air distribution ducts. The ducts ensure that clean air is transported or extracted to the rooms.
The controls are also installed. For example, CO2 sensors in the bedrooms and living room and a timer in the bathroom. These controls let the unit know when to ventilate so that there is always clean air.
Find an installer or contact person and discuss your wishes. They can check whether it is possible. With new construction there is often room for all your wishes. If you are going to renovate, the feasibility of your wishes will be taken into account.
When you decidied for an installern, an intake interview with the installer follows. If desired, the installer will contact Zehnder for advice and a ventilation calculation. The ventilation calculation shows which unit and controls are suitable for your needs and the size of the house. This way you get the best advice for a quiet and balanced ventilation system. Based on this calculation and your wishes, the installer will make a quote.
If you are an installer, we have a great calculation tool- just contact us >
The installer starts with the preparations for your home. He or she orders the right materials and ensures that everything is delivered on time.
It's time! The ventilation system is being installed. It starts with the roof penetrations and the collapsing or laying of the air distribution ducts. The ducts ensure that clean air is transported or extracted to the rooms.
The controls are also installed. For example, CO2 sensors in the bedrooms and living room and a timer in the bathroom. These controls let the unit know when to ventilate so that there is always clean air.
The ventilation system is in place and the ducts are connected to it. Now it's time to arrange everything. This is what the installer or Zehnder indoor climate expert does. During adjustment, the ventilation calculation is taken into account and the valves in the rooms are adjusted to the required amount of air (depending on the size of the room).
The settings are adjusted on the unit so that the system is balanced and works as desired.
Finally, the ventilation system must be maintained. With a heat recovery system, the filters must be replaced every six months. You can easily replace filters yourself. Just contact your local installer. We also recommend having the ventilation system regularly checked.
With mechanical ventilation, we recommend having the ventilation system checked every 2 years.
Most ventilation units work fully automatically. Does your ventilation unit have a display or app? It will then indicate when something is wrong. In addition, it is wise to have it checked by an indoor climate expert once every two years in the case of mechanical ventilation and once or twice a year in the case of heat recovery ventilation.
You can easily replace the air filters in your ventilation system with heat recovery yourself.
It is recommended to replace your filters at least twice a year. This way you keep the indoor air healthy and your system energy efficient. Using sensors, an intelligent heat recovery unit measures how clean or dirty the filters are. This gives a message on the display when the filters need to be replaced.