1) Cleanroom design guide

https://cleanroomtechnology.com/news/article_page/HVAC_cleanroom_design_calculation_explained/156934

2) WHO HVAC Guide -1

https://www.who.int/docs/default-source/medicines/norms-and-standards/guidelines/production/trs1010-annex8-who-gmp-heating-ventilation-airconditioning.pdf?sfvrsn=c77698e2_0

3) WHO HVAC Guide -2

https://www.who.int/docs/default-source/medicines/norms-and-standards/guidelines/production/trs1010-annex8-who-gmp-heating-ventilation-airconditioning-part2.pdf?sfvrsn=88f312c7_0

4) WHO HVAC Guide -3

https://gmpua.com/CleanRoom/HVAC/Solid.pdf

5) WHO HVAC Guide -3

https://pbe-expert.com/wp-content/uploads/2018/04/WHO_HVAC_QAS15-639_31082015.pdf

6) HVAC DESIGN

https://www.usbr.gov/tsc/techreferences/mands/mands-pdfs/HVACManl.pdf