ANSI/ASHRAE Standard Thermal Environmental Conditions for Human Occupancy is an .. 5 December ^ Jump up to: ASHRAE Standard 55 ( ). ANSI ASHRAE Standard (Thermal Environmental Conditions).pdf – Download as PDF File .pdf), Text File .txt) or read online. ASHRAE 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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Ashrae standard 55-2004, the evaluation of comfort in existing buildings can be performed from two perspectives: When extracting environmental data from the Building Administration System, one wtandard evaluate the location, height, and time step of the sensors based on the previous suggestion. Sample documentation is provided in Informative Appendix J.

Metabolic rate is the rate of transformation of chemical energy into heat and mechanical work ashrae standard 55-2004 metabolic activities of an individual.

Standard 55 – Thermal Environmental Conditions for Human Occupancy

SinceStandard 55 has been rewritten with a renewed focus on application of the standard by practitioners and use of clear, enforceable language. This method is based on ashrae standard 55-2004 concept that when occupants choose their clothing according to their environment, the outdoor environment is more influential than the indoor one. The answers of open-ended questions from “very dissatisfied” stadard should be documented for later analysis.

The third method is to add all the clo value of each garment to match the clothing ensemble in ashrae standard 55-2004. The standard addresses the four primary environmental factors temperaturethermal radiationhumidityand air ashrae standard 55-2004 and two personal factors activity and clothing that affect thermal comfort.

The survey shall be distributed to the entire occupancy or representative part of the occupancy. Thermal comfort is the condition of mind that expresses satisfaction with the thermal environment and is assessed by subjective evaluation.


Views Read Edit View history. There is a function to determine the representative clothing insulation at each segment. 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 systems must be able to maintain these conditions within the expected range of indoor and outdoor operating conditions. For occupant-controlled naturally conditioned space, ashrae standard 55-2004 adaptive model shall be used to determine the thermal comfort boundaries.

In the standard included the following changes. It was revised in,and For occupant-controlled naturally conditioned spaces, the measured results shall be check with the comfort zone established by adaptive model. This table can be used together with the previous one, so that one can add or subtract the clothing ensemble from the clo value of each garment. 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.

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. Comfort zone refers to the combinations of air temperature, mean radiant temperature trand humidity that are predicted to be an acceptable thermal environment at particular values of air speed, metabolic rate, and clothing insulation I cl ashrae standard 55-2004.

Thus, it only provides an approximation of the clothing insulation value of a moving person. Standard 55 specifies conditions for acceptable thermal ashrae standard 55-2004 and is intended for use in design, operation, and commissioning of buildings and other occupied spaces. After the body of the standard there are 11 informative appendices. In the body of the standard was rewritten in mandatory language, with informative language moved from the ashrae standard 55-2004 of the standard to informative appendices.


Ashrae standard 55-2004 thermal comfort can be determined from the responses of the occupant survey. Heating, ventilating, and air conditioning Ashrae standard 55-2004 engineering Heat transfer Ashrae standard 55-2004 Architecture occupations.

ASHRAE 55 – Wikipedia

Clothing insulation refers to the heat transfer of the entire body, which includes the uncovered parts, such as hands and heads. If the occupant is moving, it also affects the insulation value of clothing. The applicability of the cooling effect of 55-20044 movement was expanded to apply to naturally conditioned spaces. Given the widespread and easy accessibility of computing power and third-party implementations of the analytical method, it is expected that more users will favor the stansard analytical methods ashrae standard 55-2004 the graphical method.

The graph is valid ashrae standard 55-2004 prevailing mean temperatures between 10— The methodology is based on the SET Standard Effective Temperature model, which provides a way to stabdard an effective temperature at a standard metabolic rate, and clothing insulation values to ashrae standard 55-2004 thermal sensations experienced at a range of thermal conditions.

Standard 55 – Thermal Environmental Conditions for Human Occupancy

For seating occupants, the air temperature and air speed measurements shall be taken at heights asbrae 0. Ashrae standard 55-2004 far, all the clothing insulation value can be used when the occupant is standing. As metabolic rates increase over 1.