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ASHRAE: American Society of Heating, Refrigerating, and Air Conditioning Engineers

ASHRAE, the American Society of Heating, Refrigerating and Air Conditioning Engineers, is a nonprofit organization that develops and publishes standards for the heating, ventilating and air conditioning industry. Headquartered in Atlanta, United States, ASHRAE is an international society with over 50,000 members. ASHRAE standards are spread by its heavy involvement in Washington D.C. and with its wide assortment of international events. ASHRAE also serves as the administrator for the U.S. TAGs (United States Technical Advisory Group) to ISO/TCs 86, 142, 180 and 205 (International Organization for Standardization/Technical Committee) and to many of the subcommittees for ISO/TCs 86 and 180. Standards from ASHRAE are available both individually, directly through the ANSI webstore, and as part of a Standards Subscription. If you or your organization are interested in easy, managed, online access to standards that can be shared, a Standards Subscription may be what you need - please contact us at: or 1-212-642-4980 or Request Proposal Price.

Below are ASHRAE's best-selling standards. To find additional standards, please use the search bar above.

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Ventilation of Health Care Facilities

Defines ventilation system design requirements that provide environmental control in health care facilities. Applies to patient care areas, resident care areas, related support areas within health care facilities, new buildings, additions to existing buildings, and those alterations to existing buildings that are identified within this standard. Establishes design requirements for temperature and humidity, design requirements for odor control and asepsis, and design requirements for ventilation rates, including, but not limited to, outdoor air to serve health care facilities. Dual units of measurement.

ANSI/ASHRAE Standard 110-2016

Methods of Testing Performance of Laboratory Fume Hoods

This method of testing applies to conventional, bypass, auxiliary air, and variable-air-volume (VAV) laboratory fume hoods. This standard is intended primarily for laboratory and factory testing but may be used as an aid in evaluating installed performance as well.

ANSI/ASHRAE Standard 188-2021

Legionellosis: Risk Management for Building Water Systems

Provides minimum legionellosis risk management requirements for the design, construction, commissioning, operation, maintenance, repair, replacement, and expansion of new and existing buildings and their associated (potable and nonpotable) water systems and components. Applies to human-occupied commercial, institutional, multiunit residential, and industrial buildings. This standard does not include single-family residential buildings. Only where specifically noted in this standard shall certain building water systems or parts of building water systems be exempt. standard is intended for use by owners and managers of human-occupied buildings, excluding single-family residential buildings. This standard is also intended for those involved in the design, construction, installation, commissioning, operation, maintenance, and service of centralized building water systems and components. Dual units of measurement.

ASHRAE 52.2-2017

Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size

This standard describes a method of laboratory testing to measure the performance of general ventilation air-cleaning devices

ANSI/ASHRAE Standard 72-2018

Method of Testing Open and Closed Commercial Refrigerators and Freezers

This standard applies to the following types of open and closed commercial refrigerators and freezers used for displaying or holding products for which refrigeration is either required or desired: (a.)Horizontal, semivertical, and vertical open and closed refrigerators and freezers; (b.) Both remote and self-contained open and closed refrigerators and freezers. 

ASHRAE Standard 15-2019/ASHRAE Standard 34-2019 package

Safety Standard for Refrigeration Systems and Designation and Classification of Refrigerants

ASHRAE Standard 15 specifies safe design, construction, installation, and operation of refrigeration systems. Establishes safeguards for life, limb, health, and property and prescribes safety requirements. Applies to the a) design, construction, test, installation, operation, and inspection of mechanical and absorption refrigeration systems, including heat-pump systems used in stationary applications; b) modifications, including replacement of parts or components if they are not identical in function and capacity; and c) substitutions of refrigerants having a different designation ASHRAE Standard 34 is intended to establish a simple means of referring to common refrigerants instead of using the chemical name, formula, or trade name. It establishes a uniform system for assigning reference numbers, safety classifications, and refrigerant concentration limits to refrigerants. The standard also identifies requirements to apply for designations and safety classifications for refrigerants and to determine refrigerant concentration limits. Provides an unambiguous system for numbering refrigerants and assigning composition designating prefixes for refrigerants. Safety classifications based on toxicity and flammability data are included along with refrigerant concentration limits for the refrigerants

ANSI/ASHRAE/IES Standard 100-2018

Energy Efficiency in Existing Buildings

This standard applies to existing buildings, portions of buildings, and building complexes, including the envelope and all systems in the building. This standard excludes industrial and agricultural processes in buildings for which the energy targets do not include those processes.

ANSI/ASHRAE/ACCA Standard 180-2018

Standard Practice for Inspection and Maintenance of Commercial Building HVAC Systems

This standard provides minimum requirements for the HVAC system inspection and maintenance practice in new and existing buildings. Where specifically noted in this standard, different requirements apply.

ASHRAE Guideline 14-2014

Measurement of Energy, Demand, and Water Savings

This document provides procedures for using measured preretrofit and postretrofit billing data (e.g., kWh, kW, Mcf, kgal)for the calculation of energy, demand, and water savings. The procedures (a) include the determination of energy, demand, and water savings from individual facilities or meters; (b). apply to all forms of energy, including electricity, gas, oil, district heating/cooling, renewables, and water and wastewater; and (c.) encompass all types of facilities: residential, commercial, institutional, and industrial.


As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.