Can nitrogen be purchased without a 608 certification?

• A. Yes
• B. No
• C. Only with supervision
• D. Only for laboratories

Answer: (A)

Nitrogen isn’t a refrigerant, and the 608 certification is required only for handling regulated refrigerants used in HVAC equipment. Because nitrogen is an inert gas used for purposes like purging lines, leak testing, or inerting, it isn’t subject to the 608 certification requirements. So you can purchase nitrogen without having to be certified.

Some suppliers may have their own purchasing rules (such as showing ID or a business account), but EPA 608 certification specifically isn’t needed. The idea that it would require supervision or is restricted to laboratories isn’t accurate, since the restriction applies to refrigerant handling, not to general gas purchases for non-refrigerant uses. Always follow standard safety guidelines when handling compressed gas.