Does the Section 608 venting prohibition apply to low-pressure (Type III) appliances, given that these systems normally operate under vacuum rather than positive pressure?
Not quite. The answer is B: Yes — the venting prohibition applies to all regulated equipment, including low-pressure appliances, regardless of their normal operating pressure
The venting prohibition isn't limited to equipment that happens to run above atmospheric pressure — it applies across the board to regulated refrigerant, including the refrigerant charge inside a low-pressure chiller. The fact that the system normally sits under vacuum doesn't create any exemption once refrigerant is actually removed or released from the equipment.
Reference: 40 CFR Part 82 § 82.154(a)(1) (Venting prohibition)
Checked against the official text
Read the eCFR text current through 2026-10-30 of § 82.154. Applies to any appliance and any non-exempt refrigerant with no carve-out by operating pressure.
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