July 26, 2021 @ 9:00 am - July 28, 2021 @ 1:00 pm Duct and Envelope Tightness (DET) Verification – Online Training Online This three-day online course is designed to introduce the skills necessary to become a Duct and Envelope Tightness (DET) Verifier, certified to perform the diagnostic testing required for new homes … Continue reading "Duct and Envelope Tightness (DET) Verification – Online Training"
