Due to the improved thermal insulation of buildings (new as well as retrofitted), the energy consumption for covering the transmission losses has been substantially reduced over the last 2 decades. The same tendency is not observed when looking to the ventilation in buildings. The air tightness of buildings is in most cases improved but the number of buildings with ventilation provisions is strongly increased and energy efficient measures (heat recovery, free-cooling, demand controlled ventilation, . . . ) are not yet common in most buildings. In the future, it is possible that, in a number of countries, the specific energy consumption for ventilation will substantially increase, because of a wider use of ventilation systems and the request for higher ventilation rates (as can be illustrated by the discussions within CEN TC 156 'Ventilation'). For modern office buildings, more than 50% of the heating demand will be related to the ventilation losses.
It is crucial to improve the performances of ventilation systems, as well with respect to the design, the execution (e.g. better control of the air flow rates,...) and their use. Optimisation should focus on better energy performance AND better indoor climate conditions.
This proposal aims to contribute to a substantial progress and has the following objectives:
1. To achieve a better understanding of the impact of air flow rate requirements found in standards on the energy demand of buildings (residential and office type buildings) and the existing background for the specification of the ventilation requirements.
2. To evaluate, by means of monitoring, for a selection of buildings (dwellings and offices) equipped with mechanical ventilation the level of agreement between the required, design and real air flow rates, between the required, design and real sound levels, between the required, design and real draught performances, between the desirable and real fan consumption, between the desirable and real air quality of the supply air and between the expected and real performances of heat recovery in practice.
3. To analyse in the participating member countries (south, central, north of Europe) as well as in some other countries the impact of standards and building regulations on the performances of ventilation systems. 4. To develop a really performance oriented approach for mechanical ventilation including procedures for on site performance checking. This approach must allow a better market penetration for innovative technologies;
5. To apply the performance concept on a representative range of systems and produce a set of guidelines.
6. To develop a number of smart designs for improved performances with emphasis on active acoustical insulation, medium pressure air cleaning, low pressure mechanical ventilation and intelligent fan control..
In order to achieve these objectives, an industry lead partnership has been set up combining manufacturers, designers, people strongly involved in standardisation and building regulations as well as organisations involved in research. The deliverables of the project will be directly implemented by the project partners but it is clear that the project will have a substantial spin-off on the whole ventilation sector, by implementing the methodology in ongoing activities on standardisation and building regulations.
Funding SchemeCSC - Cost-sharing contracts
RG12 7AH Bracknell
2661 AC Bergschenhoek
2600 AA Delft