PhD Heating & Cooling

PhD Heating & Cooling is a Chicago-based HVAC company founded by Dmytro, a PhD in Technical Sciences who applies engineering principles to every installation and repair. They specialize in air conditioning, furnace, boiler, water heater, tankless water heater, and mini-split systems — delivering premium installation, repair, and maintenance with a focus on precision workmanship and customer education. All technicians are NATE and EPA certified journeymen, and the company stands out for honest diagnostics, same-day emergency service, and a commitment to never cutting corners or upselling unnecessary work.