LI Heat & Air

Long Island HVAC Companies

Boiler quit, AC blowing warm, or pricing a heat pump? Find heating and cooling companies across Nassau and Suffolk, check their county license, and send one request to up to three of them.

5060708090 Heat

Pick the job that matches yours

Each page has Long Island prices from named sources, what to check first and what to ask the company.

Heating

Cooling

How a quote request works

  1. Tell us the job Pick the system and what it is doing, add your town, and say how soon you need someone.
  2. Local companies reach out Up to three Long Island companies that do that kind of work contact you by phone, text or email.
  3. You compare and choose Ask each for the county license number and a written price. Hire one, or none. There is no charge to you.

Start a request

Heating and cooling companies on Long Island

Ratings and review counts are from each company's Google listing, read in October 2026. Each card shows whether we have checked the county license yet.

All 5 in Nassau All 11 in Suffolk

$4,000 to $7,500

PSEG Long Island's 2026 rebate for a qualifying whole-house heat pump in a single-family home, depending on household income.

Source: PSEG Long Island, Rebates and Eligibility (2026)

Read the heat pump rules

Before you call a heating or cooling company

Do Long Island HVAC companies need a license?

Yes. Nassau's home improvement license covers central heating and air conditioning work, and Suffolk requires a home improvement license plus separate plumbing and electrical licenses for some HVAC work. Our license guide shows how to look one up.

Why are so many Long Island homes heated with oil?

About 59% of Long Island homes use oil for heat, against less than 9% nationwide, according to Molloy University's Sustainability Institute, citing the U.S. Census. That is why oil burner service and boilers come up so often here. See oil burner service.

What does a common heating or AC repair cost?

All Island Comfort, a Wading River company that covers both counties, puts common repairs at $200 to $700 for parts and labor on both the heating and the cooling side. Bigger repairs like a compressor or heat exchanger cost more. See heating repair and AC repair.

Is there still a federal tax credit for a new heat pump?

No. The IRS says the energy efficient home improvement credit cannot be claimed for property placed in service after December 31, 2025. PSEG Long Island's rebate still applies. See heat pump rebates.

Does it cost anything to request quotes?

No. You fill in one form, up to three companies reach out, and you decide whether to hire any of them.

Sources, checked October 2026

  1. PSEG Long Island, Heat Pump Rebates and Eligibility (2026)
  2. Molloy University Sustainability Institute, Long Island by the Numbers (April 2025)
  3. All Island Comfort, Emergency Heating Repair Long Island (accessed Oct 2026)
  4. All Island Comfort, Emergency AC Repair Long Island (accessed Oct 2026)
  5. Nassau County Consumer Affairs, Who Must Be Licensed?
  6. Suffolk County Code, Chapter 563, Home Improvement License Law
  7. IRS, Instructions for Form 5695 (2025)
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