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    • Ductless AC & Heating Installation
    • Ductless Air Conditioner Contractor
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    • Mini-Split Air Conditioning & Heating
    • Mini-Split Repair & Maintenance
  • Commercial HVAC
    • Commercial Air Conditioning Installation & Repair
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Serving Long Island Since 1934   516.488.1800

  • bbb a+
  • Contact Us
  • About
    • Careers
    • Emergency Service
    • Our Company History
    • Customer Testimonials
    • Apply For Financing
    • HVAC Maintenance Plans
    • Join Our Newsletter
    • Residential Heating & Cooling
      • Ductless Heating and Cooling
      • Comfort Products
        • Whole House Humidifiers
        • Ductwork Modifications
      • Air Purification: Kill up to 99% of viruses, bacteria and mold
        • Air Sterilization
      • Home Safety Products
        • Carbon Monoxide Detector
      • Energy Saving Products
        • Additional Return Air Runs
        • Attic Ventilator
        • Digital Setback Thermostat
    • generators
    • Privacy Policy
    • COVID-19
  • Air Conditioning
    • New Air Conditioning Installation
    • Air Conditioning Repair
    • Air Conditioning Maintenance
    • AC Service
    • Air Conditioning Systems
    • Ductless Air Conditioning
    • Mini-Split Air Conditioning
    • Indoor Air Quality
    • Variable Refrigerant Volume (VRV) Air Conditioning
    • High Velocity Air Conditioning
  • Heating
    • Heat Pumps
    • heating system maintenance
    • heating system repair
    • heating systems
    • Heating Service
    • new heating system installation
    • High Velocity Heating
    • Ductless Heating
    • boilers
      • boiler maintenance
      • boiler repair
      • Boiler Service
      • gas boiler systems
      • new boiler installation
      • Wall-Hung Boilers
    • Furnaces
      • Gas Furnaces
        • gas furnace repair
        • gas furnace maintenance
        • gas furnace installation
        • Gas Furnace Service
        • high efficiency gas furnace
    • Oil Conversions
    • Air Quality Products
  • ductless
    • Ductless AC & Heating Installation
    • Ductless Air Conditioner Contractor
    • ductless repair & maintenance
    • Ductless System Warranties and Costs
    • Mini-Split Air Conditioning & Heating
    • Mini-Split Repair & Maintenance
  • Commercial HVAC
    • Commercial Air Conditioning Installation & Repair
    • Commercial Boilers Installation & Repair
    • Commercial Heating Installation & Repair
    • Commercial Maintenance
      • Commercial Cooling System Tune-Ups
      • Commercial Heating System Tune-Ups
    • Commercial Rooftop Installation & Repair
    • Variable Refrigerant Flow (VRF) Commercial Ductless
  • Resources
    • Kerry’s HVAC Blog
    • Ask a Tech
    • Get a Quote
    • Learn About Ductless Systems (Infographic)
    • HVAC Solutions
      • Ceiling Saver Kit
      • Condensate Drainage
      • Hard Start Kit
      • Remote Monitoring Devices
      • Surge Suppressors
      • Protecting Your Compressor

Serving Long Island Since 1934   516.488.1800

T. F. O'Brien Cooling & Heating » About Us » Join Our Newsletter

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G.O. - Northport, NY

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T.F. O'Brien
100 Denton Ave., New Hyde Park, NY
(516) 488-1800
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