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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From Wikipedia, the free encyclopedia. There are 55-22010 cases when evaluating thermal comfort: This section of the standard is applicable for the design of buildings.

As the voice of the U. When such measurement ashrwe not feasible, this standard provides four methods to determine the clothing insulation. The most recent version of the standard was published in When occupant is sitting, one has to realize the insulation effect of the chair, and the decrease of insulation due to compression of the air in the clothing.

The measured results should be evaluated against the adjusted comfort zone for the specific building. Looking ashhrae previous revisions of this standard?

Adaptive model is a model that relates indoor design temperatures or acceptable temperature ranges to outdoor meteorological or climatological parameters. The survey shall be distributed to the entire occupancy or representative part of the occupancy.

Standard 55 – Thermal Environmental Conditions for Human Occupancy

This approximation is an equation that relates the clothing insulation with the metabolic rate. Both of these sections are clarified and streamlined for use by owners and third-party rating systems.

Clothing insulation is the resistance to sensible heat transfer provided by a clothing ensemble expressed in units of 55-200, which is a unit to quantify the insulation provided by garments and clothing ensembles. As described within the standard: You may delete a document from your Alert Profile at any time.


ANSI/ASHRAE Standard – Thermal Environmental Conditions for Human Occupancy

It is also specified that the methods provided by this standard are no longer valid when the clothing insulation exceed 1. Radiant temperature asymmetry between ceiling and floor, and air and walls must be limited to reduce discomfort. In the first form, different individuals wear different clothing due to factors that are not related to thermal conditions, and the second form is opposite. Except sedentary activities, metabolic rate for all other activities is likely to have range of variation.

Standard 55 – Thermal Environmental Conditions for Human Occupancy

The standard addresses the four primary environmental factors temperaturethermal radiation asgrae, humidityand air speed and two personal factors activity and clothing that affect thermal comfort. When the duration of an activity is equal or less than one hour, one can use a time-weighted metabolic rate.

This standard is also available to be included in Standards Subscriptions. This standard is not included in any packages. In order to achieve acceptable results, the standard also suggests the minimum equipment accuracy based the current industry standard. There should be at least seven points on the scale ending with “very acceptable” and “very unacceptable.

You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. 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. Considering that a sleeping person or one in ahrae posture will be provided with sufficient insulation with the bedding material, and he or she is also 55-200 to adjust, it is impossible to determine the clothing insulation effect for these occupants unless they are immobile.


This is the energy produced from a unit skin surface area of an average person seated at rest. The answers adhrae open-ended questions from “very dissatisfied” occupants should be documented for later analysis.

These are not part of the aehrae, but provide additional 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. 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.

Exceedance hour is the number of occupied hours within a defined time period in which the environmental conditions in an occupied space are outside the comfort zone. The environmental factors addressed in this standard are temperature, thermal radiation, humidity, and air speed; the personal factors are those of activity and clothing.

Operative temperatures may not fluctuate more than 1. Aviation, Space, and Environmental Medicine.

Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. 55-22010 is a function to determine the representative clothing insulation at each segment.

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