A WTW ventilation system (heat recovery system) ensures that fresh air enters your home, while the heat from the exhaust air is reused. This allows you to enjoy a healthy indoor environment without unnecessary heat loss. Many people think that WTW is only suitable for new construction houses, but it can also be a valuable investment in an existing home. In this article you will read how you can implement WTW ventilation in an existing home, what it costs and what to look out for.
Why WTW ventilation in an existing home is a good idea
A good ventilation system is important for healthy and energy-efficient homes. WTW ventilation (also called balanced ventilation) removes polluted air and brings in clean, pre-heated air. This provides multiple benefits. You benefit from a healthier indoor climate because moisture and harmful substances are removed, which prevents mold. At the same time, you lose less heat, saving energy and increasing living comfort. Especially in well-insulated houses WTW is an ideal addition.
How does a heat recovery system work in an existing home?
A heat recovery system (WTW) extracts heat from the exhaust air and uses it to heat the incoming air. This keeps the temperature in the home stable without drafts or energy loss. The warm air from inside flows through a heat exchanger where the energy is transferred to fresh outside air. That warmed air is then distributed through ducts throughout the house. This reduces the need for heating and keeps air quality consistently high. The system works fully automatically, making it maintenance-friendly and energy-efficient.
Installing a heat exchanger in an existing home: where do you start?
Installing a WTW in an existing home requires careful preparation. The first step is to determine if your home is suitable. A well-insulated home with adequate space for ductwork is ideal. The installation consists of a central unit, air ducts, grilles and filters. Often the unit is placed in the attic or in a technical room.
Key points of interest are:
- Air duct space: in existing homes, ducts may need to be cleverly concealed in ceilings or cabinets.
- Proper air sealing: to prevent drafts and maintain efficiency.
- Sound insulation: modern systems are quiet, but proper placement prevents resonant noise.
- Professional installation: have a licensed installer calculate capacity and properly adjust the system for optimal performance.
With proper preparation, a WTW system can be installed within days, often without major remodeling.
What does it cost to replace mechanical ventilation with WTW?
The cost of WTW ventilation in an existing home depends on the type of home, the desired capacity and the complexity of the installation. On average, the costs are between €4,000 and €7,000, including installation. When existing ductwork can be reused, the costs are lower.
On the other hand, there are structural savings on energy bills as less heat is lost. In addition, subsidies are available through schemes such as the Sustainable Energy Investment Subsidy (ISDE). These can significantly reduce the total investment. An installer can calculate exactly what the best balance between cost and return is in your situation.
Questions about WTW ventilation installation in an existing home?
Want to know if your home is suitable for WTW ventilation and what it costs in your situation? Then contact the specialists at De Duurzame Jongens. During a no-obligation consultation, we discuss the possibilities, provide insight into the costs and advise on the most efficient approach. In this way you can turn your existing house into a comfortable and energy-efficient home.
