ASHRAE Journal - February 2020 - 50

FEATURE

Creating Clearer Paths to Compliance

Updates to ASHRAE's
Continuous Maintenance
Standards

Several of ASHRAE's continuous maintenance standards received major revisions
last year, affecting the energy efﬁciency, ventilation, indoor air quality areas of the
HVAC&R industry. ANSI/ASHRAE/IES Standard 90.1-2019, Energy Efﬁciency Standard
for Buildings Except Low-Rise Residential Buildings, was among the standards undergoing
major updates. A common theme for these 2019 updates is providing users clarity and
options. Here is a look at the revisions.
Standard 62.1

Simplifying to Achieve Better Ventilation, IAQ
ASHRAE's non-residential ventilation and IAQ standard, ANSI/ASHRAE Standard 62.1-2019, Ventilation for
Acceptable Indoor Air Quality, simpliﬁes calculations and
improves options in procedures for designers and practitioners to apply in many of their designs, said Jennifer
Isenbeck, P.E., Member ASHRAE, who is chair of the
standard's project committee.
"ASHRAE 62.1-2019 will continue on a path of
improved indoor air quality to address all of humanity.
The updates in this document hope to achieve clarity
to the user, address misinterpretations and include
improved equipment and building requirements," she
said.
She said the standard committee listened to and
acknowledged ASHRAE members' requests.
"The committee may not be able to accomplish all proposed changes through addenda, but the ANSI process
has allowed a fair and transparent pathway to improve
50

ASHRAE JOURNAL

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FEBRUARY 2020

this standard," Isenbeck said.
The material added includes information from recent
research and equipment updates. The new version
removes outdated citations. The standard recognizes
not all procedures and not all occupancies are equal,
she said.
"Designers and practitioners will ﬁnd improved
options in procedures, simpliﬁed calculations and a
check table (Informative Appendix L) that will be applicable in many of their designs," Isenbeck said. "The
SPC 62.1 worked diligently over the past three years to
respond to various interpretation requests and inquiries
from users. A clariﬁed Table 6.1 'Minimum Ventilation
Rates in Breathing Zone' is the result of this work."
The enhanced natural ventilation procedure can be
applied in more climate zones and regions, and the
updated and additional Informative Appendix includes
improved guidance and rationale for users, said
Isenbeck. When using the Ventilation Rate Procedure,
additional occupancies have been added, and other

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ASHRAE Journal - February 2020

Table of Contents for the Digital Edition of ASHRAE Journal - February 2020

Contents
ASHRAE Journal - February 2020 - Intro
ASHRAE Journal - February 2020 - Cover1
ASHRAE Journal - February 2020 - Cover2
ASHRAE Journal - February 2020 - Cover2a
ASHRAE Journal - February 2020 - Contents
ASHRAE Journal - February 2020 - 3
ASHRAE Journal - February 2020 - 4
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ASHRAE Journal - February 2020 - Cover3
ASHRAE Journal - February 2020 - Cover4
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