Family Owned & Operated since 1972

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

We are A Trane Comfort Specialist




  • Heating

  • Heating
    Central Heating
    Trane | Mitsubishi


  • Cooling

  • Cooling
    Heat Pumps, Mini Splits # AC
    Trane | Mitsubishi


  • Water Heating

  • Water Heating
    Tankless & Traditional
    Rinnai | Bradford White


  • IAQ

  • Indoor Air Quality
    Clean Air. Better Air
    Trane | Honeywell | Aprilaire


  • Trane
    Putting your comfort
    on Cruise Control.


  • Mitsubishi
    Comfort without Compromise



We Sell Comfort

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.


Mitsubishi Diamond Contractor
The Air Conditioning Sizing Specialists


Mitsubishi Electric Diamond Contractors are trained to choose the right heating & cooling system for your home. Whether it’s a ductless system for just one room or your entire home. Mitsubishi Heating and Cooling systems give you comfort control and efficiency all in one package.

Contact S.J. Kowalski now to find out how we can revitalize your home by refreshing your air.


Trane Comfort Specialist
Committed to Being the Best


Having the title Trane Comfort Specialist means that we are committed to being the best in installation, service, customer satisfaction and employee training. Not every dealer qualifies as a Trane Comfort Specialist, but rather only those that meet Trane’s stringent standards and who demonstrate a commitment to customer satisfaction and continuing education. S.J. Kowalski is committed these principles ensuring that you receive a system that is designed to achieve maximum efficiency, reliability and comfort.

Contact S.J. Kowalski now to find out how we can revitalize your home by refreshing your air.


ClimateMaster GeoElite Dealer
Geothermal Heating & Cooling Experts


ClimateMaster supports a national network of independent geothermal HVAC dealers, contractors and installers who sell and support our manufacturer-warrantied, high efficiency ENERGY STAR® geothermal heating and cooling systems, units and parts. They provide homeowners with ongoing HVAC service and customer support long after installation.

ClimateMaster GeoElite® Dealers are independent dealers who have experience installing ClimateMaster units and are trained, certified and selected by independent distributors of ClimateMaster products.

Contact S.J. Kowalski now to find out how we can revitalize your home by refreshing your air.

Geocoding consumer 431431 ,

Geocoding consumer 431431 ,

Geocoding consumer 431431 ,

Geocoding consumer 430957 ,

Geocoding consumer 430957 ,

Geocoding consumer 430957 ,

Geocoding consumer 430957 ,

Geocoding consumer 430957 ,

Geocoding consumer 430957 ,

Geocoding consumer 430419 ,

Geocoding consumer 430419 ,

Geocoding consumer 423887 ,

Geocoding consumer 423887 ,

Geocoding consumer 430417 ,

Geocoding consumer 431432 ,

Geocoding consumer 431432 ,

Geocoding consumer 430067 ,

Geocoding consumer 429690 ,

Geocoding consumer 429690 ,

Geocoding consumer 425302 ,

Geocoding consumer 425287 ,

Geocoding consumer 425287 ,