Air conditioning, cooling, ventilation, air infiltration

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Post date: 8 Dec 2009
Type: Spis

The design of Spirehuset makes use of both cross and stack natural ventilation principles. Stack ventilation operates with lower air inlets located in the windows, at a normal window height, and upper exhaust openings located in the roof. The air enters smaller zones, on the periphery of the building. Air moves from these to the large common room, located in the centre of Spirehuset. To encourage the stack effect, the roof of the common room is designed to be higher than those of the other rooms.
Post date: 8 Dec 2009
Type: Spis

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Post date: 7 Dec 2009
Type: Događanje

Post date: 5 Dec 2009
Type: Publication

Article 4 of the EPBD stipulates explicitly that attention should be paid to indoor climate conditions: “Member States shall take the necessary measures to ensure that minimum energy performance requirements for buildings are setThese requirements shall take account of general indoor climate conditions, in order to avoid possible negative effects…”. This is also listed in the annex of the EPBD: The methodology of calculation of energy performances of buildings shall include… (d) ventilation;…
Post date: 2 Dec 2009
Type: Ask the Experts

Mechanical ventilation and air conditioning control the indoor conditions with a specific high consistency range that is independent of external conditions, whereas passive systems cannot be regulated that precisely and quickly. However, passive cooling makes proper use of the existing natural possibilities and principles, uncharged by side effects, thus simulating better the natural conditions, providing a feeling of comfort and using less to no energy. 
Post date: 2 Dec 2009
Type: Ask the Experts

Based on the idea that the human body continually adapts to a variety of conditions, an adaptive standard, would not include fixed indoor parameters but, would aim to promote (easy) adaptation by using the following principles:
Post date: 2 Dec 2009
Type: Ask the Experts

Adaptive comfort builds on the principle that people experience differently and adapt, up to a certain extent, to a variety of indoor conditions, depending on their clothing, their activity and general physical condition. Therefore, contrary to the conventional cooling which is based on pre-calculated temperatures and humidity levels, the adaptive approach is based on a non fixed set of conditions, taking into account thermal perception and behavior of the user, requiring him to take an active role in controlling his indoor environment.
Post date: 2 Dec 2009
Type: Ask the Experts

The main international guidelines and standards on thermal comfort are: ·         International Standard ISO 7730. This standard is based on Fanger’s Predicted Mean Vote (PMV), which predicts the mean thermal sensation of a group of people, and the Predicted Percentage of people Dissatisfied with the environment (PPD). ·         ASHRAE 55 defines conditions that are being considered satisfactory for a specific percentage of users, including calculation methodologies for thermal comfort based on PMV/PPD
Post date: 2 Dec 2009
Type: Ask the Experts