Designation/certificate to do commercial hvac drawings???

[wantboost]

What is the designation needed or certificate to do commercial HVAC drawings I am aware of the one through hrai to do Residential but what is it for commercial and where can you obtain this from

[Admin]

HRAI seems to have a small commercial course,

https://www.hrai.ca/hrai-training-course/small-commercial-air-system-design

[wantboost]

Saw that it's very minimal. Can't find  what's the next step above that .