GUIDE- LINES Integrated Natural Ventilation Design One of the main tasks was to identify the parameters that have the largest influence on the performance of natural ventilation. Guidelines for integrated natural ventilation Guidelines for the design were made within the work package. The guidelines were established by using two products of the work package (below). The NatVent program A computer simulation tool, calculating air flow rates and indoor temperature, was created. Parametric study Statistical analysis of a large number of simulations using the NatVent program was made Guidelines for integrated natural ventilation Guidelines for the design were made within the work package. The guidelines were established by using two products of the work package (below). The NatVent program A computer simulation tool, calculating air flow rates and indoor temperature, was created. Parametric study Statistical analysis of a large number of simulations using the NatVent program was made Integrated Design Integrated Design Back to “WP3” Back to “WP3” Guidelines More... Parametric Study Parametric Study NatVent

Integrated Design Integrated Design Back to “WP3” Back to “WP3” Guidelines More... Parametric Study Parametric Study NatVent Altogether five different ventilation strategies were studied. For each strategy twelve parameters were altered and the effect of the change was studied. Ventilation Strategy Climate Number of storeys Air leakage Internal heat loads Thermal mass Night ventilationFenestration Type of windows Vent size Solar shading Windows open Thermal insulation level Parametric Study Simulations were made for a cell-type office building, where different parameters, e.g. Thermal mass, window area, ventilation strategy, were altered. Over-heating and poor ventilation rates were the key issues for the study.

NatVent Integrated Design Integrated Design Back to “WP3” Back to “WP3” Guidelines More... Parametric Study Parametric Study NatVent Practical Guidelines for Integrated Natural Ventilation Results from the statistical analysis of the simulations show how to improve natural ventilation: High buildings gives better stack effect Airtight buildings (Build tight - Ventilate right!) Well insulated envelopes High thermal mass Large area of (adjustable) facade vents Limited internal heat loads Providing for night ventilation Limited solar loads by limited window area and/or solar shading devices Providing for user-controlled window airing

You can read and print pdf-files with the Acrobat® Reader ®3.0. Program. This program is free. Download it from the Acrobat web site: OR run the installation file ar32e301(1).exe in the directory \Installation You can read and print pdf-files with the Acrobat® Reader ®3.0. Program. This program is free. Download it from the Acrobat web site: OR run the installation file ar32e301(1).exe in the directory \Installation More information... NatVent You can fin more information on: the Practical Guidelines for integrated Natural Ventilation in the document \Reports\ Technological solutions\ 3.5_integration & maintenance.pdf The NatVent program in the presentation of the final products: Go back to the Main page and choose Final Products - The NatVent program You can fin more information on: the Practical Guidelines for integrated Natural Ventilation in the document \Reports\ Technological solutions\ 3.5_integration & maintenance.pdf The NatVent program in the presentation of the final products: Go back to the Main page and choose Final Products - The NatVent program Integrated Design Integrated Design Back to “WP3” Back to “WP3” Guidelines More... Parametric Study Parametric Study