Recent Blog Posts

Q&A | ANSI/IIAR 2-2021 Natural Ventilation Requirements

May 29th, 2024

Question: Does my machinery room need an emergency ventilation system if it only has three walls? Answer: It may not require mechanical ventilation and could meet the requirements for “Natural Ventilation”. ANSI/IIAR 2-2021 §7.3.2 states that for outdoor systems, natural ventilation can be utilized instead of mechanical ventilation. For a machinery room to qualify for […]

IIAR 2-2021: Ammonia Machinery Room Ventilation Requirements

June 28th, 2022

In 2021, IIAR published a new edition of their flagship standard ANSI/IIAR 2 which addresses the requirements for designing a safe ammonia refrigeration system. Machinery room ventilation is one of the many important topics addressed within Standard 2. While the requirements have not changed substantially since the 2014 edition, we have put together this blog […]

Ammonia Week in Review | August 10, 2018

August 10th, 2018

A Detroit bottling plant has a large ammonia release in this week’s edition of the Ammonia Week in Review… Ammonia Leak Prompts Hazmat Situation at Industrial Building near John R, State Fair in Detroit – Roads in the area were being shut down as police and fire crews responded. There was a strong odor in the area. […keep […]

Ventilation System Tests

August 7th, 2018

Machinery room ventilation systems have long been required by model codes and standards. Dating back to at least the 1967 Uniform Mechanical Code[1], refrigeration machinery rooms have been required to be configured with adequate ventilation in the event of a refrigerant release. While we have written previously about the current ventilation design, control, and testing […]