ThermoTek certifies that Models WPM24B-T thru WPM48B-T are licensed to bear the AMCA seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and Publication 311 and comply with the requirements of the AMCA Certified Rating Program.

Models WPM24B-T thru WPM48B-T are listed under UL705 (Electrical).

The Model WPM-T fans are listed by Canadian Standards Association Testing Laboratory as approved.