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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To reduce draft risk at temperatures below An accompanying table lists provisions for higher operative temperatures at air speeds above 0. This is the energy produced from a unit skin surface area of an average person seated at rest.

As metabolic rates increase over 1. For such spaces, the indoor and outdoor air temperature and mean radiant temperature and the air speed need to be measured.

If these requirements are met and the environmental conditions inside the building fall within the indicated ranges, then compliance is achieved. Accurate data from the measurement using thermal manikins is acceptable.

As for point-in-time surveys, the survey should be solicited during the time of occupancy, and the satisfaction scale ought to be continuous. If the document is revised or amended, you will be notified by ashtae.

Home Technical Resources Bookstore. There should be at least seven points on the scale ending with “very acceptable” and “very unacceptable. For the first, it is not correct to use the average clothing insulation value to zshrae the desired thermal conditions for all occupants.

When extracting environmental data from the Building Administration System, one should evaluate the location, height, and time step of the sensors based on the previous suggestion. The measured results should be evaluated against the adjusted comfort zone for the specific building. When occupants do not have control over the cyclical variation or drifts in indoor environmental conditions, the conditions within this section must 552010 met.


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 PMV is greater than 0. SinceStandard 55 has been rewritten with a renewed focus on application of the standard by practitioners and use of clear, enforceable language. For occupant-controlled asheae conditioned spaces, the measured results shall be check with the comfort zone established ashraw adaptive model.

Standard 55 – Thermal Environmental Conditions for Human Occupancy

Heating, ventilating, and air conditioning Building engineering Heat transfer Architecture Architecture occupations. If the occupant is moving, it also affects the insulation value of clothing. For an occupant-controlled naturally conditioned 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.

For thermal comfort—this is the standard. It is defined as per unit of skin surface area which equals to 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.

In the standard underwent significant changes with the addition of two thermal comfort models: Clothing insulation refers to the heat transfer of the entire body, which includes the uncovered parts, such as hands and heads. The second method is to add or subtract individual garment clo value to achieve the clothing ensemble in question.


ANSI/ASHRAE Standard – Thermal Environmental Conditions for Human Occupancy

In the body of the standard was rewritten in mandatory language, with informative language moved from the body of the standard to informative appendices. This standard is also available to be included in Standards Subscriptions. Adaptive model is a model that relates indoor design temperatures or acceptable temperature ranges to outdoor meteorological or climatological parameters. Retrieved 5 December Views Read Edit View history. There are two cases when evaluating thermal comfort: 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.

The answers of open-ended questions from “very dissatisfied” occupants should be documented for later analysis. For mechanically conditioned spaces, the PMV-based comfort zone has to be determined, which includes measuring and recording the metabolic activity and clothing insulation.

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. In the standard included the following changes.