Test, Don’t Guess: How to Build a Better HVAC Business
In this episode of "HVAC Chats," Derek Aarstad, owner of DNA Heating and Cooling in Richmond, Virginia, discusses how building science, diagnostics, performance testing, and customer education have shaped his high-performance HVAC business. Aarstad explains why more than half of the comfort complaints he encounters are not actually equipment problems and how heat load calculations, Manual S, commissioning, duct leakage testing, and IAQ assessments can help contractors deliver better-performing HVAC systems. He also shares lessons on intentionally limiting company growth, attracting the right customers through organic digital channels, using AI-driven referrals, and avoiding technician and owner burnout.







