At the start of the AIR-COSIM project, a selection of relevant ventilation combinations and feasible usage scenarios was made, taking into account the special requirements of low-cost housing. Based on this, a detailed test plan was drawn up for the metrological tests in the housing laboratory at Rosenheim University of Applied Sciences. Parallel to setting up and organizing the metrological tests, Fraunhofer IBP programmed a simulation environment corresponding to the real test setup with the Indoor Environmental Simulation Suite (IESS). The measurements taken under realistic conditions in the housing laboratory delivered practice-oriented performance values of the selected solutions. Coupled with the simulation models generated in parallel, the study enables a large number of possible solutions and combinations to be tested. This forms a valid basis for planners to dimension technical building services.
Based on the measurement and simulation results, an evaluation matrix was developed to identify effective and cost-efficient system combinations. This allows different solution combinations to be compared in terms of cost efficiency, air quality and thermal comfort, and can be used by planners as a design and dimensioning tool.
To complement the characteristic values measured, important aspects of subjective perception were also studied with the aid of test persons in a focus group and a subsequent online survey. Thus, potential users could give feedback about the requirements of the ventilation systems, as well as evaluate the components investigated in the project.
The results of the project provide a good overview of suitable and inexpensive combinations of ventilation systems. In addition, valid simulation models were developed to demonstrate these ventilation solutions in different apartment layouts. This, coupled with the evaluation matrix developed, has created a valid planning basis for combining natural and mechanical ventilation systems tailored to requirements.