ASHRAE 84-2024 PDF

ASHRAE Standard 84 provides rules for the measurement and expression of values characterizing the energy-related performance of air-to-air heat/energy exchangers. The 2024 edition of Standard 84 updates informative and normative references.

ASHRAE 185.3-2024 PDF

ANSI/ASHRAE Standard 185.3-2024 establishes a test method for evaluating commercial and industrial in-room air-cleaning devices and systems for microorganism bioaerosol removal or inactivation in a test chamber.

This standard:

• Specifies selected indicator microorganisms in the test chamber and defines procedures for generating the bioaerosols required for the method of test.

• Provides a method for counting the number of viable microorganisms in the chamber to calculate the elimination efficiency for each microorganism.

• Establishes minimum performance specifications for the equipment required to conduct the tests, defines methods of calculating and reporting results obtained from the test data, and establishes a reporting system to be applied to in-room devices and systems addressed by the standard.

ASHRAE 35-2014 (RA2024) PDF

ANSI/ASHRAE Standard 35 establishes a method of testing desiccants for use in refrigerant drying.

ASHRAE 183-2024 PDF

ANSI/ASHRAE/ACCA Standard 183 establishes minimum requirements for methods and procedures used to perform peak cooling and heating load calculations for buildings except low-rise residential buildings.

ASHRAE 133-2024 PDF

ANSI/ASHRAE Standard 133 provides procedures for testing direct evaporative cooling devices under laboratory conditions to obtain rating information.

The revised 2024 edition represents a comprehensive update of the standard, including changes to meet ASHRAE’s mandatory language requirements.

ASHRAE 193-2010 (RA2024) PDF

ANSI/ASHRAE Standard 193 prescribes a method of test to determine the airtightness of forced-air HVAC equipment prior to field installation.

ASHRAE 90.1-2022 (I-P) PDF

Standard 90.1 has been a benchmark for commercial building energy codes in the United States, and a key basis for codes and standards around the world, for almost half a century. This standard provides the minimum requirements for energy-efficient design of most sites and buildings, except low-rise residential buildings. It offers, in detail, the minimum energy efficiency requirements for design and construction of new sites and buildings and their systems, new portions of buildings and their systems, and new systems and equipment in existing buildings, as well as criteria for determining compliance with these requirements. It is an indispensable reference for engineers and other professionals involved in design of buildings, sites, and building systems.

The 2022 edition of Standard 90.1 incorporates over 80 addenda to the 2019 edition. Major additions appearing for the first time in a minimum-efficiency U.S. model energy standard or code at the national level include:

• A minimum prescriptive requirement for on-site renewable energy
• An optional Mechanical System Performance Path allowing HVAC system efficiency tradeoffs based on the new total system performance ratio (TSPR) metric
• New requirements to address the impacts of thermal bridging

Other highlights include:

• An expanded scope to include sites as well as buildings
• New energy credit requirements for a customized approach to improving energy efficiency
• New informative guidance for using carbon emissions, site energy, or source energy as alternative performance metrics to the current energy cost metric
• Significant efficiency increases in IEER for commercial rooftops and a new SEER2/HSPF2 metric for <65K sized air-cooled heat pumps.

ASHRAE 62.1-2022 PDF

Standard 62.1 specifies minimum ventilation rates and other measures intended to provide indoor air quality (IAQ) that’s acceptable to human occupants and that minimizes adverse health effects. The standard provides procedures and methods for meeting minimum ventilation and IAQ requirements to engineers, design professionals, owners, and jurisdictional authorities where model codes have been adopted.

Since its original publication, Standard 62.1 has been revised and enhanced in ways that make it more than an air treatment and ventilation standard. To signify that indoor air quality goes beyond minimum ventilation requirements – and in recognition of those aspects of building systems (equipment, filtration, controls, and more) that contribute to acceptable IAQ – the title of the standard has been updated to “Ventilation and Acceptable Indoor Air Quality.”

Standard 62.1 is uniquely qualified to address ventilation and acceptable IAQ in the built environment and will enable stakeholders to make a conscientious effort to improve the indoor environment while maintaining a minimum standard for ventilation. The addenda that compose the 2022 edition of the standard represent years of research, statistical evidence, and improved building systems and technologies:

• Reorganized Section 5, “Systems and Equipment,” to better reflect the path of airflow and illustrate how buildings, systems, and equipment are related
• Continued focus on IAQ, including improvements to the IAQ Procedure, setting maximum dew-point temperatures in mechanically cooled buildings and required exhaust air separation distances
• Added owner acknowledgment of ANSI/ASHRAE Standard 188
• Relocated health-care-related spaces in the scope of ASHRAE/ASHE Standard 170 to a new normative appendix
• Updated definitions, clarified air density adjustments, and removed of items related to transient occupancies that now fall under Standard 62.2

ASHRAE/ICC/USGBC/IES 189.1-2023 PDF

This product is only available for purchase outside the United States and Canada. U.S. and Canada customers should instead purchase the appropriate edition of the International Green Construction Code (IgCC).

ANSI/ASHRAE/ICC/USGBC/IES Standard 189.1, Standard for the Design of High-Performance Green Buildings Except Low-Rise Residential Buildings, provides total building sustainability guidance for designing, building, renovating, and operating high-performance green buildings. From site location to energy use to recycling, this standard sets the foundation for green buildings by addressing site sustainability, water use efficiency, energy efficiency, indoor environmental quality (IEQ), and the building’s impact on the atmosphere, materials and resources.

The 2023 edition of Standard 189.1 arrives with exciting updates, including changes that aid in building decarbonization:

General

* An updated scope clarifies the standard’s application to sites and to the demolition and deconstruction of buildings, and provides guidance on changes of occupancy or use in buildings.

* New language allows authorities having jurisdiction to disallow improper installation of equipment in a building project.

* Direction is provided for the regulation of used materials and equipment.

Site

* Residential electric vehicle (EV) charging requirements are separated from nonresidential requirements.

* New provisions are added for EV-capable parking spaces, and compliance options are expanded based on percentage of total parking spaces.

Water

* Landscape design language is simplified, and reasonable exceptions are added for select site uses and settings.

* Electronic leak detection requirements are added for buildings and certain end uses.

* Hot-water efficiency requirements are updated by removing the need for pipe volume calculations.

* Commercial kitchens are made exempt from hot-water design requirements.

* The definition of “potable water” is now in alignment with the International Plumbing Code.

Energy

* Additional efficiency credits have been harmonized with Standard 90.1-2022.

* Increased lighting efficiency is reflected in lower lighting power density targets and requirements.

* A jurisdictional option is added for electric-ready that requires branch circuits or raceways to be installed where fossil-fuel-fired equipment is installed.

* Advanced lighting requirements for indoor grow spaces and greenhouses are added, and the lighting is required to be powered by renewable energy.

* Advanced lighting requirements are added for indoor grow spaces and greenhouses.

* New requirements are added for electric-water-heater demand response.

Energy Modeling

* The Performance Option is relocated and updated to include new CO2e and Building Performance Factor data.

* Compliance with three metrics–PCI, zCEF, and zEPI–is now required.

* A new long-run marginal emission rates (LRMER) jurisdictional option is added with the calculation guidelines and tables in Normative Appendix D.

Indoor Environmental Quality

* Soil-gas control requirements are improved to reflect current industry practices that incorporate ANSI/AARST mandated measures in new building construction projects.

* Building resiliency is improved with the ability to adjust ventilation quickly and easily in response to air-quality-related emergency conditions, such as nearby wildfires, chemical spills, or pandemics.

* MERV 13 filters are now required in outdoor airstreams for all buildings located in nonattainment areas.

Materials and Resources

* Prescriptive and performance paths are eliminated and now appear as alternatives under “Material Selection.”

* Considerations are added for reuse of materials.

* The standard now requires submittal of environmental product declarations (EPD) for products meeting specific criteria, as well as the reporting of total global warming potential (GWP) from those products.

Construction and Plans for Operation

* Building flush-out requirements are deleted, and additional ventilation is required prior to occupancy and during initial occupancy.

* Contaminant monitoring requirements are updated for initial occupancy and include providing the owner a report with graphical trends and recommendations.