About Our Company

Patrick Kilgannon | Residential Retrofit Expert & Founder of Custom Air Conditioning & Air Quality, LLC

Patrick Kilgannon isn’t just the owner of Custom Air Conditioning & Air Quality LLC in Zephyrhills, Florida; he is known around town as a local HVAC expert. While many companies focus on “box-swapping” in new construction, Patrick Kilgannon has spent over 34 years in the trenches of mechanical systems, mastering the high-stakes art of the Residential Retrofit. He specializes in the surgical integration of 21st-century energy-efficient systems into existing homes and custom new construction. Patrick does this by providing good energy and heat load calculations with proper-sized duct work, leading to lower humidity and clean, comfortable, energy-efficient air. “Between the initial ductwork not being done with good calculations and homeowners using the wrong air filters, not changing air filters, and not getting the proper maintenance done on their units, I see new systems failing in 5 to 7 years when they should be lasting at least 10 to 12 years.”

As a veteran in the HVAC industry, Patrick has personally diagnosed and optimized over 50,000residential systems, and overseen the installation and maintenance of over 100,000 systems. Known for his “Whole-Home” philosophy, Patrick doesn’t just look at the air conditioner; he analyzes the building envelope for proper sizing of equipment and ductwork design. “A lot of contractors sell these new energy-efficient units, and they don’t do any duct work. They just swap out the unit, not looking at the house and what it truly needs. But when homeowners want to put in a good energy-efficient system, it’s important to change the duct work, or at least make some modifications, to make everything function properly. Otherwise, they’re not getting the full energy use out of their new unit.”

As a TRANE Comfort Specialist Premier Dealer, Patrick is a leading expert in TRANE and Daikin Goodman manufactured equipment, helping homeowners in Hillsborough and Pasco County transition away from outdated, energy-draining systems toward high-efficiency electric solutions. His mission is to bridge the gap between complex mechanical engineering and practical, cost-saving home ownership. “We really strive to educate consumers and also sign them up on our maintenance memberships to ensure their units are cleaned every year. This allows us to help homeowners get the useful life out of their unit, avoid costly repairs, and save money on their electric bill each month.”