Discover the shocking truth about why 99% of HVAC systems may be oversized and how insulation contractors hold the key to fixing comfort and efficiency problems.

On this episode of the R-Value Podcast, IDI expert Ken Allison interviews Brynn Cooksey. Known as the "Air Doctor," Brynn is the owner of Air Doctors Heating and Cooling and an industry heavyweight who has trained over 10,000 technicians. Recognized as one of ESCO Institute's Top 25 Most Influential Instructors and a Certified Master Trainer by IREC, he combines 15 years of utility experience with substantial building science expertise to reduce customer utility bills by 50% or more.

Many HVAC contractors fall into the trap of "box swapping," replacing old units with equipment of the same size without considering the home's actual needs. Brynn shares a startling statistic from a Michigan study where nearly every furnace inspected was grossly oversized, leading to comfort issues, premature equipment failure, and high energy bills. The conversation highlights why performing a proper Manual J load calculation is critical and how tight building envelopes fundamentally change heating and cooling requirements.

Beyond temperature control, the discussion explores the vital connection between insulation, air sealing, and Indoor Air Quality (IAQ). Brynn explains his company's non-negotiable policy of testing IAQ on every single job and how using data from diagnostic tools—like blower doors and air monitors—builds unshakeable trust with homeowners. Listen in to learn how insulation professionals can partner with HVAC contractors to offer total home solutions that improve health, efficiency, and profitability.

Inside this episode:

• 00:06:06 – The growing importance and market demand for BPI certifications.
• 00:14:41 – A shocking study reveals 99% of furnaces and 33% of AC units are oversized.
• 00:16:04 – How oversized equipment leads to "short cycling" and catastrophic mechanical failure.
• 00:25:04 – Why guessing air leakage is impossible and the necessity of using a blower door.
• 00:36:00 – Implementing a mandatory policy to test Indoor Air Quality on every service call.
• 00:46:45 – The "secret sauce" to closing sales: involving the customer in diagnostic testing.