A+ Derr Heating & Cooling - Louisville's Certified HVAC Services

We provide comprehensive HVAC installation or replacement and system repair services for homes and businesses in Louisville. Our team handles heating, air conditioning, heat pumps, and furnaces, ensuring each solution is tailored to your specific needs. With decades of local experience, we focus on quality workmanship and reliable service.

For Louisville residents dealing with clogged air filters or mold growth in ductwork, our technicians perform thorough inspections and cleaning. We recommend regular filter changes to improve air quality and efficiency, and for mold concerns, we use safe, effective methods to clean and sanitize ductwork, helping prevent health issues and system damage common in our humid climate.

As a fourth-generation, family-operated business since 1970, A+ Derr combines decades of expertise with a personal commitment to customer care. We've served the Louisville area for nearly fifty years, building trust through reliable service, a large technician fleet for fast responses, and a focus on doing the job right the first time—all at an affordable price.