License classifications
Seattle Mun. Code § 6.410.070
in effect6.410.070 - License classifications
Licenses shall be classified as follows:
A. Refrigeration Journeyman's License. A refrigeration journeyman's license is required except as herein provided for all persons who install, alter or repair a refrigeration system with a unit containing six (6) pounds or more of any refrigerant and actuated by a motor or engine having a standard rating of one-fourth (¼) horsepower or more, or absorption systems having a rating of one-fourth (¼) ton or more refrigeration effect.
B. Refrigeration Contractor's License. A refrigeration contractor's license is required except as provided by this chapter for all persons who install, repair, service, alter, or move approved self-contained or unit refrigeration systems as defined by the Seattle Municipal Code.
C. There shall be three (3) classes of licenses for refrigeration contractors and for journeyman refrigeration mechanics as follows:
Class A—Covering refrigeration machines using only sulphur dioxide, methyl chloride, all freons;
Class B—Covering refrigerating machines using all other refrigerants;
Class C—Covering all refrigerating machines using refrigerants included in Classes A and B.
D. Refrigeration Operator's Licenses. A refrigeration operator's license is required except as provided by this chapter for all persons who operate and conduct maintenance of refrigeration and air conditioning systems that require annual certification in accordance with Section 119 of the Seattle Mechanical Code.
A refrigeration contractor's license is not required to install, alter, add to, repair, or service an established refrigeration system in a building where the owner and/or operator employs, in the regular course of business, an industrial refrigeration engineer licensed under this chapter. No license is required to repair or service an established refrigeration system in a building where the owner and/or operator employs, in the regular course of business, a refrigeration operating engineer licensed under this chapter.
(Ord. 126278, § 8, 2021 [cross-reference correction and style cleanup]; Ord. 122109, § 2, 2006.)
Source: City of Seattle, Seattle Municipal Code and City Charter (Municode Library, library.municode.com)URL: https://library.municode.com/wa/seattle/codes/municipal_code?nodeId=TIT6BURE_SUBTITLE_IVNELICO_CH6.410RESY_6.410.070LICLFetched: 11/1/2026