EX-21 4 a2020-q4xxsubsidiariesofth.htm EX-21 Document

Subsidiaries of the Registrant as of December 31, 2020

Entity NameJurisdiction of Incorporation
Profire Combustion, Inc.Alberta, Canada
Prochem, ULCAlberta, Canada
Profire Holdings, LLCUtah
Midflow Services, LLCOhio