The boiler stops on a freezing February night. A central air-conditioning system begins blowing warm air during a July heatwave. In a Manhattan restaurant, refrigeration trouble threatens an entire day’s food supply. New York’s changing seasons make reliable heating and cooling essential rather than optional.
A dependable HVAC contractor should diagnose the real problem, explain repair and replacement choices clearly, and provide continuing support after installation. Since no single contractor serves every part of the state, this list includes reputable companies covering New York City, Long Island, Western New York and the Southern Tier. Let us take a closer look at our top HVAC company picks for New York in 2026.
1. Isaac Heating & Air Conditioning
Isaac Heating & Air Conditioning is one of the strongest choices for customers across Western and Central New York. Its locations serve Rochester, Canandaigua, Avon, the Twin Tiers, Syracuse and Buffalo.
The company handles residential air conditioning, furnaces, boilers, heat pumps, ductless systems, plumbing, electrical work and insulation. Its commercial division also services heating, air conditioning, boilers, furnaces and refrigeration equipment.
Isaac provides emergency service and works on equipment from different manufacturers. Its broad regional footprint is especially useful for property owners outside the New York City market who want one company for HVAC, electrical and plumbing needs.
Why Isaac Heating & Air Conditioning is included: Its multiple New York locations and ability to handle both residential and commercial systems give it one of the widest service ranges on this list.
- Rochester office: 50 Holleder Parkway, Rochester, NY 14615
- Official website: https://www.isaacheating.com/
2. Arista Air Conditioning
Arista Air Conditioning specialises in commercial and luxury residential HVAC work across the New York City metropolitan area. Founded in 1949, the company also provides commercial refrigeration and restaurant-kitchen equipment services.
Its work includes system design, installation, emergency repair and planned maintenance. Arista is particularly relevant to offices, retail stores, restaurants, luxury apartments and buildings with complicated heating, cooling or refrigeration systems.
The company reports operating a fleet of more than 100 service vehicles and serving thousands of commercial and residential customers. That scale can support faster responses across densely populated parts of the city.
Why Arista Air Conditioning is included: Its long New York City history and expertise in complex commercial, refrigeration and high-end residential systems make it a leading metropolitan HVAC contractor.
- Headquarters: 38-26 10th Street, Long Island City, NY 11101
- Official website: https://aristair.com/
3. Petri Plumbing, Heating, Cooling & Drain Cleaning
Petri is a fourth-generation Brooklyn company tracing its history to 1906. It serves homeowners across Brooklyn, Queens, Manhattan and selected surrounding areas.
Its HVAC services include air-conditioning installation and repair, ductless systems, furnaces, boilers, heat pumps, thermostats and indoor-air-quality equipment. Petri also offers plumbing, water-heater and drain services, which can be helpful when a heating problem involves connected plumbing or boiler components.
The company provides 24-hour emergency assistance and advertises same-day booking availability for many jobs. Its long experience with boilers and older city properties is particularly relevant in New York’s brownstones, apartment buildings and pre-war homes.
Why Petri is included: More than a century of local experience and strong knowledge of New York City heating systems make it a practical residential choice.
- Brooklyn locations: 355 Butler Street, Brooklyn, NY 11217
901 Bay Ridge Avenue, Brooklyn, NY 11219 - Official website: https://www.petriplumbing.com/
4. Varsity Home Service
Varsity Home Service is a family-operated Long Island company with more than 60 years of experience. It serves communities including Babylon, Huntington, Commack, Dix Hills, Hicksville, Smithtown, Syosset and Ronkonkoma.
The company provides heating and air-conditioning installation, repair and maintenance. It also handles boilers, ductless systems, indoor-air-quality equipment, plumbing, water filtration and emergency services.
Varsity may be particularly suitable for owners of older Long Island homes where installing central air or modern ductless equipment requires careful planning. Free estimates are available for qualifying replacement and installation projects.
Why Varsity Home Service is included: Its long Long Island history and combination of heating, cooling, plumbing and indoor-air-quality services make it a useful whole-home contractor.
- Office address: 1610 Ocean Avenue, Bohemia, NY 11716
- Official website: https://www.varsityhomeservice.com/
5. Auchinachie Services
Auchinachie Services has operated since 1906 and serves Binghamton, Ithaca, Cortland, Oneonta, Norwich, Owego and other Southern Tier and Central New York communities.
Its HVAC work covers air-conditioning repair and installation, ductless systems, furnaces, heat pumps, boilers and oil-to-gas conversions. The company also provides plumbing, drains, water treatment, duct services, indoor-air-quality solutions and generators.
Auchinachie offers emergency assistance and serves both homes and businesses. Its broad service area makes it especially useful in communities where homeowners may have fewer large HVAC contractors to choose from.
Why Auchinachie Services is included: Its long regional history and experience with boilers, furnaces, heat pumps and water systems make it a strong Southern Tier option.
- Office address: 42 Frederick Street, Binghamton, NY 13901
- Official website: https://www.auchinachie.com/
What Should Customers Compare?
Obtain at least three written estimates for a major replacement. Each proposal should identify the equipment model, capacity, efficiency rating, labour warranty, permit work and responsibility for removing the old system.
A contractor should calculate the heating and cooling requirements rather than automatically installing equipment with the same capacity as the old unit. Oversized equipment may cycle too frequently, while an undersized system may struggle during extreme temperatures.
Frequently Asked Questions
Q: Should an HVAC company perform a load calculation?
A: Yes, especially before replacing or installing a complete system. The calculation considers the property’s size, insulation, windows, air leakage and local climate to determine suitable equipment capacity.
Q: Is a heat pump suitable for New York winters?
A: Modern cold-climate heat pumps can operate during low temperatures. Some homes may still benefit from backup heat, depending on the building, location and system design.
Q: Why are HVAC quotations sometimes very different?
A: Companies may propose different equipment, warranties, duct modifications and installation methods. One quotation may also exclude electrical, permit or disposal costs included by another contractor.
Q: Does replacing an outdoor air-conditioning unit require replacing the indoor unit?
A: Not always, but the indoor coil and outdoor unit must be properly matched. Mixing incompatible components can reduce performance and may affect manufacturer warranty coverage.
Q: What should be checked after installation?
A: Confirm that every room receives suitable airflow, the thermostat works correctly, condensate drains properly and the system reaches the agreed indoor temperature. Keep the final invoice, permit records and warranty documents.