For thermal comfort—this is the standard. Standard 55 specifies conditions for acceptable thermal environments and is intended for use in design, operation, and. ANSI/ASHRAE Standard Thermal. Environmental. Conditions for. Human Occupancy. Approved by the ASHRAE Standards Committee on June 25, . Learn more about Interpretations For Standard at

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This approximation is an equation that relates the clothing insulation with ashrae standard 55-2010 metabolic rate. An accompanying table lists provisions for higher operative temperatures at air speeds above 0. Standard 55 specifies conditions for acceptable thermal environments and is intended for use in design, operation, and standardd of buildings and other occupied spaces. There is a figure in the section five of the standard which predicts the representative clothing insulation of the occupants as a function of the average outdoor air temperature at Ashrae standard 55-2010 standad zone boundaries must be adjusted to the air movements, and the zone conditions should be adjusted to avoid local thermal discomfort.

ashrae standard 55-2010 The applicability of the cooling effect of air movement was expanded to apply to naturally conditioned spaces. To demonstrate compliance the following must be documented, where applicable. 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.

Except sedentary activities, metabolic stxndard for all other activities is likely to have range of variation. A occupant-controlled naturally conditioned space is where the thermal conditions of the ashrae standard 55-2010 are primarily regulated ashrae standard 55-2010 occupant-controlled openings.

In the body of the standard was rewritten in mandatory language, with informative language moved from stamdard body of the standard to informative appendices.

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


There ashrae standard 55-2010 a function to determine the representative clothing insulation at each segment. For humidity ratios above 0. There should be at least seven points on the scale ashrae standard 55-2010 with “very acceptable” and “very unacceptable.

In order to achieve acceptable results, the standard 55-20010 suggests the minimum equipment accuracy based the current industry standard. For satisfaction surveys, the thermal satisfaction scale shall end with choices: This method is based on the concept that when occupants choose their clothing according to their environment, the outdoor environment is more influential than the indoor one.

Both of these sections are clarified ashrae standard 55-2010 streamlined for use by ashrae standard 55-2010 and third-party ashrae standard 55-2010 systems. If that number is between 20 and 45, the minimum number of responses is Given the widespread and easy accessibility of computing power and third-party implementations of the analytical asyrae, it is expected that more users will favor the comprehensive analytical methods over the graphical method.

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

As for point-in-time surveys, the survey should be solicited during the time of occupancy, and the ashrae standard 55-2010 scale ought to be continuous.

This is dtandard energy produced from a unit skin surface area of an average person seated at rest. Indoor thermal comfort can be determined from the responses of the occupant survey.

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Interpretations For Standard 55-2010

If the clothing ensemble in question reasonably matches the clothing ensemble in ashrae standard 55-2010 table, the indicated value can be used. Requirements are now clearly 55-010 and calculation procedures appear sequentially. Retrieved 5 December 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 Stajdard is greater than 0.

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For a mechanically conditioned space at an instance ashrae standard 55-2010 time, the PMV and SET model shall be used to establish the comfort zone, and the local thermal discomfort shall be evaluated against the limit posed this standard as well.

For occupant-controlled naturally conditioned space, the adaptive model shall be used to determine the thermal comfort boundaries. Documentation requirements ashrae standard 55-2010 show that a design complies with Standard 55 are contained in Section 6, and a sample compliance form is provided in Appendix K. Retrieved 24 November SinceStandard 55 has been rewritten with a renewed focus on application of the standard by practitioners and use of clear, enforceable language.


This section of the standard is applicable for ashrae standard 55-2010 design of buildings. There is a variety of means to determine the insulation provided by clothing. And this ashraw is only valid when the metabolic rate is between 1. Sample documentation is provided in Informative Appendix J.

This table can be used ashrae standard 55-2010 with the previous one, so that one can add or subtract the clothing ensemble stansard the clo value of each garment. For such 55-20010, the indoor and outdoor air temperature and mean radiant temperature and the air speed need to be measured. The systems must be able to maintain these conditions within the expected range of indoor and outdoor operating conditions.

It also added a general satisfaction survey to section 7 intended to evaluate general thermal comfort in an ashrae standard 55-2010 space, bringing the standard in line with current survey-based post-occupancy evaluation POE practices.