Analysis
NAICS 22133 is the 2022 NAICS industry for steam and air-conditioning supply, part of 2213 (Water, Sewage and Other Systems).
It has only one more detailed code, 221330, which covers exactly the same activities; the definition, index entries and statistics are on that page.
County Business Patterns counts 118 US establishments in this code in 2023, employing 1,957 people at an average annual payroll of $117,526 per employee (90th percentile of national industries). 37% of the establishments have fewer than five employees, which is close to the national mix.
By establishments it ranks 3rd of the 3 codes at this level within Water, Sewage and Other Systems, with 2.3% of them.
Between 2018 and 2023 the number of establishments fell 8% and employment fell 15%. The 2018 count used NAICS 2017, so part of a large move can come from codes being redefined rather than from businesses opening or closing.
Official definition
See industry description for 221330.
Source: US Census Bureau, NAICS 2022 Manual.