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Hong Kong law Chapter 123F, Building (Planning) Regulations, Regulation 23 sect 3 sub-paragraph (a) defined that: Subject to sub-paragraph (b), for the purposes of regulations 19, 20, 21 and 22, the gross floor area of a building shall be the area contained within the external walls of the building measured at each floor level (including any floor below the level of the ground), together with ...
Air changes per hour, abbreviated ACPH or ACH, or air change rate is the number of times that the total air volume in a room or space is completely removed and replaced in an hour. If the air in the space is either uniform or perfectly mixed, air changes per hour is a measure of how many times the air within a defined space is replaced each hour.
This recommendation is based on the assumption that the room will have air exchanged with other rooms at a rate of less than 1 room volume per hour, and that the customer desires at least 80% of the smoke particles removed from the air. For an 8-foot (2.4 m) high room, this means the room volume should be less than or equal to 12 times the CADR ...
Comparison of 1 square metre with some Imperial and metric units of area. The square metre (international spelling as used by the International Bureau of Weights and Measures) or square meter (American spelling) is the unit of area in the International System of Units (SI) with symbol m 2. [1]
230,000 m2 (2.5 million sq ft) Museum: Louvre Museum France: Paris: 210,000 m 2 (2,260,421 sq ft) Current residence: Presidential Complex Turkey: Ankara: 200,020 m 2 (2,152,997 sq ft) Current royal residence: Istana Nurul Iman Brunei: Bandar Seri Begawan: 200,000 m 2 (2,152,782 sq ft) Royal palace: Royal Palace of Caserta Italy: Caserta
Comparison of 1 square foot with some Imperial and metric units of area. The square foot (pl. square feet; abbreviated sq ft, sf, or ft 2; also denoted by ' 2 and ⏍) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States and partially in Canada, the United Kingdom, Bangladesh, India, Nepal, Pakistan, Ghana, Liberia, Malaysia, Myanmar ...
In Japan, the size of a room is usually measured in relation to the size of tatami mats (-畳, -jō), about 1.653 m 2 (17.79 sq ft) for a standard Nagoya-size tatami. Alternatively, in terms of traditional Japanese area units , room area (and especially house floor area) is measured in terms of tsubo , where one tsubo is the area of two tatami ...
M 2 is useful because it reflects how well a collimated laser beam can be focused to a small spot, or how well a divergent laser source can be collimated. It is a better guide to beam quality than Gaussian appearance because there are many cases in which a beam can look Gaussian, yet have an M 2 value far from unity. [1]