Under HVAC background noise, add "Acoustical Performance Criteria, Design Requirements and Guidelines for Schools" after Annex A.1 and delete ";the 2015 ASHRAE Handbook-- HVAC Applications, Chapter 48, Noise and Vibration Control (with errata); AHRI Standard 885–2008".

Under Reverberation time,
1. delete the sentence "Adhere to the following reverberation time requirements."
2. delete the header "Classrooms and Core Learning Spaces < 20,000 Cubic Feet (566 Cubic Meters)" and revise the paragraph under that header to: "Design each of the classrooms and other core learning spaces to meet one of the following:"

3. Replace Option 1, Option 2, and Option 3 headers and subsequent "OR" text after each option and replace with bullets.
4. Delete the first five words under Option 1 ("For each room, confirm that").
5. Revise the sentence under Option 2 so it reads "The calculated or measured reverberation times comply with ANSI Standard S12.60-2010, Part 1."
6. Delete Option 3 and replace with
"For spaces ≥ 20,000 Cubic Feet (566 Cubic Meters), the calculated or measured reverberation times comply with Table 1:
**Table 1**
*For details of the above reverberation time requirements, please refer to Building Bulletin 93 – Acoustic Design of Schools: Performance Standards published by the UK’s Department for Education in February 2015.
Note: the reverberation time is quoted in terms of the mid-frequency reverberation time, Tmf, which is the arithmetic average of the reverberation times in 500hz, 1 kHz, and 2kHz octave bands, or the arithmetic average of the reverberation times in the one-third octave bands from 400 Hz to 2.5 kHz.

7. Under Exceptions, add the following sentence at the end: "For spaces which involve complex sound calculations and/or special considerations, such as those for music rehearsal/performance, recording studio, drama studio, teaching space intended specifically for students with special hearing or communication needs, this Prerequisite shall not apply and engagement with an acoustician is critical to the acoustic design and performance of the space."