ANSI/ASHRAE Standard Thermal. Environmental. Conditions for. Human Occupancy. See Appendix I for approval dates by the ASHRAE Standards. ANSI/ASHRAE Standard Thermal Environmental Conditions for Human Occupancy is an .. ANSI/ASHRAE Standard Standard references ( Appendix H) Provides a list of references in the version of the standard, with direct. Get this from a library! ANSI/ASHRAE standard thermal environmental conditions for human occupancy.

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Standard 55 – Thermal Environmental Conditions for Human Occupancy

As for point-in-time surveys, the survey should be solicited during the time of occupancy, and the satisfaction scale ought to be continuous.

Dor is a variety of means to determine the insulation provided by clothing. The systems must be able to conditiions these conditions within the expected range of indoor and outdoor operating conditions. Looking for previous revisions of this standard? The measurement locations should be where the occupants are expected to spend time in.

An accompanying table lists provisions for higher operative temperatures at air speeds above 0. In the standard hujan the following changes. There is a function to determine the representative clothing insulation at each segment.

Adaptive model is a model that relates indoor design temperatures or acceptable temperature ranges to outdoor meteorological or climatological parameters.

Aviation, Space, and Environmental Medicine. It was revised in,and Compliance is achieved if the conditions provide thermal neutrality, measured as falling between Environmemtal graphic method utilizes an overlay on a psychrometric chart to indicate the operative temperatures and humidity at which thermal comfort is achieved in the winter 1.

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


For occupant-controlled naturally conditioned spaces, the measured results shall be check with the comfort zone established by adaptive model. In general, body motion decreases the clothing insulation by pumping air through clothing. So far, all the clothing insulation value can be used when the occupant is standing. It is also specified that the methods provided by this standard are no longer valid when the clothing insulation exceed 1.

This page was last edited on 12 Septemberat Accurate data from the measurement using thermal manikins enviromental acceptable.

ASHRAE 55 – Wikipedia

The survey shall be distributed to the entire occupancy or representative part of the occupancy. Considering that a sleeping person or one in reclining posture will be provided with sufficient insulation with the bedding material, and he or she is also free to adjust, it is impossible to determine the clothing insulation effect for these occupants unless they are immobile.

The standard has a separate method for determining acceptable thermal conditions in occupant-controlled naturally conditioned spaces. And it is also not valid when occupants wear clothing that is highly impermeable to moisture transport. In the body of forr standard was rewritten in mandatory language, with informative language moved from the body of the standard to informative appendices.

By using this site, you agree to the Terms of Use and Privacy Policy. One can also take into account the posture of the occupants.

One has to keep in mind that the results from point-in-time surveys are only effective during the time when the surveys were solicited. Section 7 underwent major revisions for measuring thermal comfort in existing spaces including procedures for physical measurements and survey methods, and how to evaluate and report results. Home Technical Resources Bookstore. Requirements are now clearly stated and calculation procedures appear sequentially.


After the body of the standard there are 11 informative appendices. The heights need to be adjusted for standing persons.

These are not part of the standard, but provide humwn information about terms and methods described within the standard, as well as a bibliography, and a description of the addenda incorporated from the previous version in the current version. This section of the standard is applicable for the design of buildings.

The function line has four segments: For an occupant-controlled naturally condtions space, the exceedance hours are the sum of hours when the operative temperature falls outside of the lower and upper boundaries of the comfort zone.

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.

There are two cases when evaluating thermal comfort: 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 The standard suggests that the time of measurements should last two or more hours long, and it should also be a representative time of the year for this specific building.

There should be at least seven points on the scale ending with “very acceptable” and “very unacceptable.