SJ Kowalski is your local Diamond Contractor Elite!


We are your local GeoElite Dealers

We are your local Trane Comfort Specialists


Lennox HVAC


Family Owned & Operated since 1972

Over 40 Years of Installing & Servicing high efficiency heating & cooling systems

We are A Trane Comfort Specialist


Heating, A/C and Water Heater Service, Repair & Installation

We're Your Local Residential Comfort Experts!

S. J. Kowalski, Inc. has been serving the heating, air-conditioning and plumbing needs of the greater Hazleton and surrounding areas since 1972. We install high-quality equipment from today’s industry leaders like Trane, Mitsubishi, Rinnai, Honeywell and Triangle Tube while providing “round-the-clock” emergency service. We are a family owned and operated business and the area’s only Trane “Comfort Specialist” dealer.

At S.J. Kowalski we are committed to providing the best products and solutions to help lower your energy costs and keep your family safe and comfortable.


  • Over 40 years of installing and servicing of high efficiency heating and air-conditioning systems.

  • We offer in-home analysis and provide prompt free professional estimates.

  • We stand behind our installations with a "No Hassle" warranty.

  • We offer 24 hour emergency service.

  • Customer satisfaction, safety, and quality are our #1 priorities.