assessment method

Research shows that, despite compliance with building codes, residential ventilation systems do not deliver the requested air exchanges in the individual rooms. One of the reasons for this can be found in the way the building codes are composed. In general building codes only specify the minimum ventilation capacity that need to be installed in the various rooms. The actual performance of the ventilation system is left to the market.

Energy conservation at building’s operation stage is very important for the national economy. Building up reasonable methods to assess building operational energy consumption is critical and necessary. Japanese researchers use CEC (Coefficient of Energy Consumption), which is the ratio of actual energy consumption to ideal energy consumption, to assess building system’s operation level.

Today the use of energy efficient technology and renewable energy sources have not become mainstream in the building industry. One of the main reasons for this is thought to be that each part in the building is considered separately. The approach in the newly started EU-project, IDEEB, is to adopt comprehensive view. This considers the building itself and its installations as one energy system to achieve the required indoor comfort at the same time as reducing environmental impact.