- Stainless Steel
Because we offer the HVAC industry a tool to accurately perform duct traverse, we also recognize that it would be appropriate to compliment it with a sidekick, the commissioner rule. The commissioner rule enable one to verify that the traverse is performed procedurally correct. It is used as a ruler to measure the width of a duct and to locate the position of the holes that corresponds to the width. It can be used as both a corroborator and to mark up the location of the holes on the duct if necessary.