Introduction to IEA EBC Annex 78

International Energy Agency (IEA) Annex 78 was launched in 2018.

ASHRAE Publishes Standard 241, Control of Infectious Aerosols

On July 7th 2023, ASHRAE published its pioneering consensus-based, code enforceable standard, developed to reduce the risk of infectious aerosol transmission in buildings, ASHRAE Standard 241, Control of Infectious Aerosols.


ASHRAE Completes Draft of First-Ever Pathogen Mitigation Standard

On May 15th, 2023 ASHRAE announced the completion of the first draft of its standard for maintaining healthy indoor air quality (IAQ), with final approval expected in June and publishing anticipated in July.


Revision of the ventilation part of EN16798-1 and -2

As part of the mandated standards for estimating the energy performance of buildings CEN 16798-1 and -2 was developed to provide input for the indoor environment (thermal comfort, air quality/ventilation, lighting, acoustic) to energy calculations and design of buildings with its heating, cooling, ventilation, and lighting systems. A revision of this standard has now been started.

ASHRAE Commits to Developing an IAQ Pathogen Mitigation Standard

On December 7, 2022 ASHRAE’s board of directors announced its commitment to support the expedited development of a national indoor air quality (IAQ) pathogen mitigation standard. The goal is to finalize the consensus-based, code enforceable standard within six months.


New EPBD related European standards and their relation to building and HVAC system simulation

In reaction to the European Energy Performance of Buildings Directive (EPBD), existing and newly lanced standard developments by CEN (European Committee for Standardization) were harmonized and synchronized, resulting in a set of about 50 standards addressing different aspects of the EPBD and the implementation of an overall building energy performance calculation method. A few of them address simulation issues: An overview of these is given, focusing on one standard covering system related aspects for buildings with cooling, humidification or dehumidification.

Exhaust ventilation under 5 ventilation standards : A performance assessment

Sizing rules in residential ventilation standards lack uniformity in both methodology and resulting design flow rates. Additionally, mere comparison of design flow rates is case sensitive and, due to effects of infiltration, adventitious ventilation and occupancy, ill-suited to assess performance of an exhaust ventilation system with regard to the achieved indoor air quality and energy cost in terms of heat loss.

ASHRAE's new residential ventilation standard

The major concern for HVAC's professionals is the engineering of indoor environments, but health and safety must be a primary concern too. In so far as people spend nearly 90 % of their time indoors - mostly at home -, residential ventilation ought to have a large emphasis in ASHRAE. In this article, today's sources are examined (combustion, microbiologicals, radon and soil gas, particles, VOCs), then ASHRAE's residential ventilation standard requirements are listed.

Field Measurements of the Interactions between Furnaces and Forced Air Distribution Systems

Measurements on three gas and two electric furnaces have been made to examine the field performance of these furnaces and their interactions with their forced-air distribution systems. The distribution systems were retrofitted as part of this study and the impact of retrofitting on furnace performance is discussed. In addition to field measurements, this paper will discuss how forced-air furnace systems are treated in proposed ASHRAE Standard 152P, and applies the resulting equations to the systems tested in the field.

Selecting whole house ventilation strategies to meet proposed ASHRAE standard 62.2: energy cost considerations.

ASHRAE Standard 62.2P is being proposed to address residential ventilation issues. As housing, especially new housing, gets more airtight and better insulated, it has become clear that many homes are under-ventilated. The Standard contains requirements that provide minimum ventilation rates and source control measures necessary for acceptable indoor air quality. This paper uses previously reported analytical techniques to compare the energy costs of various ventilation strategies for a wide variety of climates and housing types.