Call Us At (203) 338-0371

Having trouble with your hvac system?

Our profesional, highly trained HVAC specialists are just a phone call away.

OR CALL: (203) 338-0371

Heating & Cooling Questions?

We can handle it all. Call (203) 338-0371 or Fill out the form below to contact us.

Indoor Air Quality
Residential Heating & Cooling
Preventive Maintenance
Oil to Natural Gas Conversion

Professional heating & air conditioning services in Lower Fairfield & New Haven Counties

OSA Heating & Cooling is a locally owned and operated business with over 65 years of experience in the trade. Our company’s number one priority is to offer superior heating and cooling installation, HVAC preventative maintenance, air conditioning and heating repairs, indoor air quality and duct work service.

Our versatility ensures that we are able to meet any of your residential or commercial heating and cooling requirements. We are dedicated to providing unparalleled service to all of our customers in Lower Fairfield and New Haven Counties. To meet the needs of our customers, training at OSA Heating and Cooling is an intensive and on-going process.

The end result is that you receive prompt and efficient service delivered with the utmost professionalism - the first time. That’s what sets OSA Heating & Cooling apart from our competitors.

Our trained specialists are dispatched from our local office, and are always just a phone call away. This ensures prompt, immediate responses to all situations.

  • Heating and Cooling System Installations
  • Heating and Cooling System Repairs
  • Heating and Cooling System Maintenance Services


Technician checking compressor amps