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Displacement ventilation is best suited for taller spaces (higher than 3 meters [10 feet]). [2] Standard mixing ventilation may be better suited for smaller spaces where air quality is not as great a concern, such as single-occupant offices, and where the room height is not tall (e.g., lower than 2.3 meters [7.5 feet]).
Displacement ventilation systems supply air directly to the occupied zone.The air is supplied at low velocities to cause minimal induction and mixing. This system is used for ventilation and cooling of large high spaces, such as auditorium and atria, where energy may be saved if only the occupied zone is treated rather than trying to control the conditions in the entire space.
According to the book The Journey – Singapore's Land Transport Story, the amount of traffic entering the Restricted Zone in June 1975 (before the ALS was introduced) was 32,500 vehicles, and after the beginning of the ALS in June 1975, the vehicle numbers dropped to only 7,700, between the hours of 7.30 am to 9.30 am, a 76% reduction; and 9% ...
Diffuser (sewage), an aerating device for sewage and industrial waste water treatments; Diffuser (thermodynamics), a device that controls the characteristics of a fluid at the entrance to a thermodynamic open system; Aroma lamp (sometimes called an aromatherapy diffuser or reed diffuser), used to disperse essential oils into the surroundings
This is a list of places in Singapore based on the planning areas and their constituent subzones as designated by the Urban Redevelopment Authority (URA). Based on the latest URA Master Plan in 2019, the country is divided into 5 regions , which are further subdivided into 55 planning areas , and finally subdivided into a total of 332 subzones.
By the 1940s and 1950s, Singapore experienced rapid population growth, with the population increasing to 1.7 million from 940,700 between 1947 and 1957. The living conditions of people in Singapore worsened, with many people living in informal settlements or cramped shophouses . [ 3 ]