True or False: The exhaust from a low-pressure chiller's purge unit may be vented to atmosphere without any monitoring or refrigerant-loss limitation, since the discharge is described as 'mostly air.'
Not quite. The answer is B: False
Purge unit discharge is not pure air: it carries some refrigerant along with the non-condensables. Knowingly releasing that refrigerant falls under the venting prohibition, and for covered appliances purged refrigerant counts toward the annual leak rate unless it is destroyed at a verified destruction efficiency of 98 percent or better. Waving off purge discharge as 'basically just air' ignores the refrigerant loss it can represent over the life of a chiller.
Reference: 40 CFR Part 82 § 82.154(a)(1); 82.157(k) (Venting prohibition; purged refrigerant)
Checked against the official text
Read the eCFR text current through 2026-10-30 of § 82.154. § 82.154(a)(1) prohibits knowingly releasing refrigerant; § 82.157(k) counts purged refrigerant toward the leak rate unless it is destroyed at 98% or better efficiency.