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ASHRAE Membership

ASHRAE membership is open to any person associated with heating, ventilation, air conditioning or refrigeration. ASHRAE is unique because its membership is drawn from a wide range of disciplines relating to the HVAC&R field. Over 55,000 individuals from more than 100 nations belong to the Society.

Discounts on Publications

ASHRAE members earn 15% off publications. Hundreds of titles are available including the complete collection of ASHRAE Standards including 90.1, 62.1 and 189.1.
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Develop Leadership Skills

When you join ASHRAE, you are making an investment in yourself. When you become active in the Society by giving your time and sharing your knowledge, you get even more out of that investment.

Network with Industry Professionals

Each month, all over the world, ASHRAE chapters convene for an informational program featuring a speaker or topic that is key to professionals in the industry. Meet with your peers and share ideas.
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Resources & Publications

Thermal Comfort Tool

Maintains consistency with ANSI/ASHRAE Standard 55-2010 

See selected features

ASHRAE's Thermal Comfort Tool software provides a user-friendly interface for calculating thermal comfort parameters and making thermal comfort predictions using several existing thermal comfort models. This new version focuses on the Adaptive and Predicted Mean Vote (PMV) Models and has an updated user interface.

ASHRAE Thermal Comfort Tool, Version 2 maintains consistency with ANSI/ASHRAE Standard 55-2010 and can be used to comply with USGBC's LEED®.

2011 / Software / $117 (ASHRAE Member $99)

The Standard

ANSI/ASHRAE Standard 55-2013, Thermal Environmental Conditions for Human Occupancy, specifies conditions for acceptable thermal environments and is intended for use in design, operation, and commissioning of buildings and other occupied spaces. The 2013 edition of ANSI/ASHRAE Standard 55 incorporates 18 published addenda to the 2010 edition, and provides two compliance methods: a graphic method for simple situations and an analytical method for more general cases. Analytical calculations can be easily performed using the ASHRAE Thermal Comfort Tool software available from the ASHRAE Bookstore.

Since 2010, Standard 55 has been rewritten with a renewed focus on application of the standard by practitioners and use of clear, enforceable language. Requirements are now clearly stated and calculation procedures appear sequentially.

2013 / 54 pages / $95 (ASHRAE Member $81)


ASHRAE Thermal Comfort Tool Selected Features

Four-Model System

This updated interface includes four models, including the new PMV with Elevated Air Speed, used to automatically make use of the SET air speed model described in section of the standard. Input parameters consist of environmental conditions (air temperature, mean radiant temperature, air velocity and humidity), activity level and clothing. Results include PMV, PPD, Humidity and an indicator of compliance with Standard 55. A green check mark indicates compliance and a red X indicates non-compliance with each factor, with an overall indicator in the Compliance box. Additional comments are provided when relevant.

MRT Calculator

A significant new feature allows the user to calculate mean radiant temperature based on surface temperatures of a rectangular room. The user can specify the overall size of the room (width, length and height), the location of the occupant, and the temperatures of each surface. A rectangular window or panel can be placed on each surface (walls, floor and ceiling) and can be given a different temperature than the surface it is placed on. This can be used to represent any surface that is warmer or colder than the wall, including windows, heating panels, cooling panels, or even equipment.

Clo Calculator

An improved interface to the clothing calculator was developed to allow more flexibility for an increased clothing library. The new interface allows the user to create an ensemble of clothing made up of a combination of individual elements. The data for the Clo calculator is provided in a text file that can be easily updated in the future.