Cooling and Air Quality
Low energy natural ventilation including the option of acoustic attenuation is an increasingly important design strategy for commercial buildings. Air is moved primarily by natural forces of wind and convection, so little or no power is consumed.
In comparison with air conditioning or mechanical ventilation it can bring savings in capital equipment and running costs, with reduced energy use and CO2 emissions, whilst providing controlled, comfortable conditions for users. Thermal modelling can be employed to prove the effectiveness of design strategies.
Mixed mode ventilation
In buildings such as offices with a high heat load from IT equipment, some additional cooling may be required. Passivent have developed mixed mode cooling systems combining natural ventilation with carefully controlled local cooling for the best of both worlds.
This approach is economical in operation since cooling is usually needed only at periods of peak demand and in areas of specific need. Passivent studies have shown that a well designed mixed-mode system can out-perform a conventional air-conditioned building, with substantially less energy cost.
Current technology combined with design software and sophisticated control systems mean that natural ventilation can provide optimum performance. Using the latest techniques, intelligent natural and mixed mode cooling solutions can be applied to most building types.