S.J. Kowalski, Inc.SJ Kowalski, Inc. is a family-owned HVAC and plumbing contractor serving Hazleton and surrounding areas since 1972. They install, repair, and maintain high-efficiency heating, cooling, and plumbing systems for residential and light commercial customers, including furnaces, boilers, heat pumps, air conditioners, ductless mini-splits, and geothermal solutions. They are a Trane Comfort Specialist dealer offering 24/7 emergency service, financing options, quotes, and a referral program.