ASHRAE 55-2004 PDF

Human Occupancy. ANSI/ASHRAE Standard Web site, http://www. , or in paper form from the Manager of Standards. The latest edition of . ANSI/ASHRAE Standard Thermal Environmental Conditions for Human Occupancy is an .. 5 December ^ Jump up to: ASHRAE Standard 55 ( ). ANSI/ASHRAE Standard 3. It is intended that all of the criteria in this standard be applied together since comfort in the indoor environment is.

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The graph is valid for prevailing mean temperatures between 10— The measurement locations should be where the occupants are expected to spend time in.

Generally, the evaluation of comfort in existing buildings can be performed from two perspectives: The survey shall be distributed to the entire occupancy or representative part of the occupancy.

Interpretations for Standard

The comfort zone boundaries must be adjusted to the air movements, and the zone conditions should be adjusted to avoid local thermal discomfort. Retrieved from ” https: By using this ashre, you agree to the Terms of Use and Privacy Policy. Views Read Edit View history. Operative temperatures may not fluctuate more than 1. This page was last edited on 12 Septemberat There are two cases when evaluating thermal comfort: It is also specified that the methods provided by this standard are no longer valid when the clothing insulation exceed 1.

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To evaluate the thermal comfort over a period of time in a mechanically conditioned space, the exceedance hours are the sum of all the hours when the absolute value of PMV is greater than 0. The last major change ashraw measuring air speed and air temperature experienced by the occupant, which ashre must be an average across three heights and over a period of time.

A occupant-controlled naturally conditioned space is where the thermal conditions of the space are primarily regulated by occupant-controlled openings. If that number is between 20 and 45, the minimum number of responses is Sample documentation is ashgae in Informative Appendix J.

For satisfaction surveys, the thermal satisfaction scale shall end with choices: For the first, it is not aehrae to use the average clothing insulation value to determine the desired thermal conditions for all occupants. In the standard was updated with more extensive information on measurement protocols and an expanded definitions section.

To reduce draft risk at temperatures below There is a variety of ashrxe to determine the insulation provided by clothing. The function line has four segments: As metabolic rates increase over 1. To demonstrate compliance the following must be documented, where applicable.

If the occupant is moving, it also affects the insulation value of clothing.

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To evaluate the probability of satisfaction from satisfaction surveys, the standard suggests dividing the number of the votes falling between “just satisfied” and “very satisfied” by the total number of votes in that questions. The standard reminds the users that they should use their own judgment to match the activities being considered to the comparable activities in the table. The second method is to add or subtract individual garment clo value to achieve the clothing ensemble in question.

Interpretations for Standard 55-2004

Except sedentary activities, metabolic rate for all other activities is likely to have range of variation. The answers of open-ended questions from “very dissatisfied” occupants should be documented for later analysis.

In the standard underwent significant changes with the addition of two thermal comfort models: There is a function ashae determine the representative clothing insulation at each segment.

As described within the standard: The third method is to add all the clo value of each garment to match the clothing ensemble in question. An accompanying table lists provisions for higher operative temperatures at air speeds above 0.