ASHRAE 55-2010 PDF

ASHRAE 55-2010 PDF

ANSI/ASHRAE Standard , Thermal Environmental Conditions for Human Occupancy. • Addendum p: Aligns Section with the definition of average. ANSI/ASHRAE Standard (Supersedes ANSI/ASHRAE Standard ). Includes ANSI/ASHRAE addenda listed in Appendix |. o) ASHRAE. Standard — Thermal Environmental Conditions for Human Occupancy( ANSI approved).

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For occupant-controlled naturally conditioned space, the adaptive model shall be used to determine the thermal comfort boundaries. The answers of open-ended questions from “very dissatisfied” occupants should be documented for later analysis.

Sample documentation is provided in Informative Appendix J. As for point-in-time surveys, the survey should be solicited during the time of occupancy, and the satisfaction scale ought 555-2010 be continuous. Adaptive model is a model that relates indoor design temperatures asheae acceptable temperature ranges to outdoor meteorological or climatological parameters. If the document is revised or amended, you will be notified by email. The body of the standard consists of a foreword describing changes made in the current versioneight sections and two normative appendices:.

All informative background information has been moved to informative appendices.

Standard 55 – Thermal Environmental Conditions for Human Occupancy

Generally, the evaluation of comfort in existing buildings can be performed from two perspectives: Compliance is achieved if the conditions provide thermal neutrality, measured as falling between The systems must be able to maintain these conditions within the expected range of indoor and outdoor operating conditions. The graph is valid for prevailing mean temperatures between 10— For seating occupants, the air temperature and air speed measurements shall be taken at heights of 0.

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Measuring time step should be no more than five minutes for air temperature, mean radiant ashrxe, and humidity, and no more than three minutes for the air speed. Standard 55 specifies conditions for acceptable thermal environments and is intended for use in design, operation, and commissioning of buildings and other occupied spaces.

Standard 55 – Thermal Environmental Conditions for Human Occupancy

Retrieved 24 November If the clothing ensemble in question reasonably matches the clothing ensemble in the table, the indicated value can be used. And it is also not valid when occupants wear clothing that is highly impermeable to moisture transport. Accurate data from the measurement using thermal manikins is acceptable.

For occupant-controlled naturally conditioned spaces, the measured results shall be check with the comfort zone established by adaptive model.

It was first published inand since has been updated every three to six years. The environmental factors addressed in this standard are temperature, thermal radiation, humidity, and air speed; the personal factors are those of activity and clothing.

All of the building systems must be designed to maintain the occupied spaces at the indoor conditions specified by one of the described evaluation methods at design conditions. The section sets provisions for increasing the upper air temperature limit at elevated air speeds above 0. Standards Subscriptions from Asjrae provides a money-saving, multi-user solution for accessing standards.

You can download and open ahsrae file to your own computer but DRM prevents opening this file on another computer, including a networked server. By using this site, you agree to the Terms of Use and Privacy Policy. When the number is under 20, at least 16 must reply for the survey to make the survey representative.

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The standard addresses the four primary environmental factors temperaturethermal radiationhumidityand air speed and two personal factors activity and clothing that affect thermal comfort. ahrae

When the duration of an activity is equal or less than one hour, one can use a time-weighted metabolic ashtae. Views Read Edit View history.

Indoor thermal comfort can be determined from the responses of the occupant survey. Metabolic rate is the rate of transformation of chemical energy into heat and mechanical work by metabolic activities of an individual, per unit of skin surface are expressed in units of met equal to To reduce draft risk at temperatures below These are not part of the standard, but provide additional information about terms and methods described within the standard, as well as a bibliography, 55-20100 a description of the addenda incorporated from the previous version in the current version.

If these requirements are met and the environmental conditions inside the building fall within the indicated ranges, then compliance is achieved. The function line has four segments: Documentation requirements to show that a design complies with Standard 55 are contained in Section 6, and a sample compliance form is provided in Appendix K. In the first form, different individuals wear different clothing due to factors ashre are not related to thermal conditions, and the second form is opposite.

There are two cases when evaluating thermal comfort: