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Heat Pump Installation & Replacement in Nassau County, NY

We install and replace whole-home air source heat pumps across Long Island, sizing each one to the house with a load calculation so a single system carries both the heating and the cooling that a separate boiler and condenser handle today.

Call us if you notice:

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One System Instead of Two Replacements

Diagram of a water heater, with steam rising from a water droplet above flames.

A heat pump moves heat rather than burning fuel, and it runs in both directions. In winter it pulls heat from outside air and delivers it to the house. In summer it reverses and takes heat out. That single fact is what reframes the purchase for most homeowners: the outdoor unit replaces the furnace or boiler and the central air conditioner at the same time.


That matters most when both systems are aging together, which on Long Island they usually are. An oil boiler in a Levittown cape running past its twentieth winter, or a thirty-year-old furnace in Plainview or Merrick sitting next to a condenser of the same vintage, is two large checks waiting to be written in the same year. One heat pump install is one job, one permit, one crew, and one written price.

Do Heat Pumps Actually Work in a Long Island Winter?

Yes, and this is the question worth settling before anything else. Cold climate air source heat pumps are engineered to keep producing usable heat well below freezing, which covers the great majority of a Long Island heating season. They are a different class of equipment than the heat pumps homeowners remember struggling in the 1990s, and those are the systems we install.


For the handful of nights each winter that run coldest, there are two honest answers, and which one fits depends on your house.

  • A cold climate system sized correctly to the home's heating load carries the house on its own, with electric backup heat available for the extremes.
  • A dual-fuel setup keeps your existing furnace or boiler in place and hands off to it on the coldest nights, which lets a homeowner electrify without giving up a system that still has life in it.


We tell you which of the two your house calls for after we run the load calculation, not before.

Ducted, Ductless, or Air-to-Water: Three Ways a Heat Pump Fits a House

Homeowners searching this do not arrive knowing the vocabulary, so here is the plain version of the three configurations we install.

  • Ducted whole-home heat pumps use the ductwork already in the house. If you have central air today, you likely have what the system needs, and the air handler replaces the furnace in the same footprint.
  • Ductless heat pumps deliver heating and cooling through wall or ceiling units, one per zone, with no ducts at all. A whole-home ductless install means several zones tied to one outdoor unit.
  • Air-to-water heat pumps make hot water for the baseboard, radiators, or radiant loop already in the floor. This is the route for a hydronic house with no ductwork, which describes a great deal of the housing stock in Levittown and Huntington, including the original copper-in-the-slab radiant systems.


If what you actually want is comfort in one or two rooms, a converted attic, a room addition, or a space the ducts never reached, that is a single-zone mini-split conversation rather than a whole-home one, and it is
covered on its own page.

What a Heat Pump Costs to Run Against Oil or Propane

Every heating system has two prices: what it costs to install and what it costs to feed. Oil and propane are the second price, and on Long Island it is a number that arrives in advance, several times a winter, at whatever the market decided that month.


A heat pump does not burn anything. It uses electricity to move heat that already exists in the outside air, which is why a well-sized cold climate system delivers several units of heat for every unit of energy it draws. What that means for a specific house depends on the home's heating load, the equipment selected, and what you pay per gallon and per kilowatt-hour, so we work through your actual numbers rather than a brochure average.


Two things are true for every house, though. One system covering both seasons means one piece of equipment to maintain and one service relationship instead of two. And a heat pump ends the cycle of buying fuel ahead of a season and hoping the estimate holds.

What Determines Your Investment

We do not publish a heat pump range, because the spread between a two-zone ductless install and a ducted whole-home system with an electrical upgrade is too wide for a number to be useful to you. What we can tell you is exactly what moves it.

  • The size of the home and the heating load we calculate for it
  • Ducted, ductless, or air-to-water, and how many zones the design calls for
  • Whether the existing ductwork is usable as-is or needs modification
  • Electrical service capacity, and whether a panel upgrade is part of the job
  • Whether the existing furnace or boiler stays in place as dual-fuel backup or comes out


Our quote is flat-rate and written before work starts, and it includes labor, parts, materials, code compliance, testing, and cleanup. Options are presented before anything is approved, and the price we quote is the price you pay. Published investment ranges for our other replacement work sit on the
Pricing & Process page, and financing is available through an outside lender for a project this size.

What the Installation Actually Involves

A whole-home heat pump is a multi-day job, and nobody should buy one without knowing what those days look like.

  • Step 1: Load calculation and system design

    We measure the house, not the old equipment. Square footage, insulation, windows, and how the home actually loses heat determine the size of the system, because a heat pump that is oversized short-cycles and one that is undersized leaves you cold in February.

  • Step 2: Equipment selection and written quote

    We present the configurations that fit your home, ducted, ductless, or air-to-water, with a flat-rate written price for each before you commit to anything.

  • Step 3: Permits and code compliance

    We pull the permits and handle the code requirements, including any electrical work the system needs. That is part of the quoted price, not a line item that appears later.

  • Step 4: Removal or retention of the existing system

    The old furnace, boiler, or condenser comes out and goes away, or stays in place as dual-fuel backup, depending on the design we agreed to.

  • Step 5: Installation, commissioning, and testing

    We set the equipment, run the refrigerant and electrical, charge and test the system in both heating and cooling, walk you through the controls, and clean up behind ourselves. Boot covers and drop cloths are standard on every one of our jobs.

The Gold Star Guarantee covers the craftsmanship, the code compliance, and your satisfaction with the finished install.

- E.H.

Keeping a Twelve-Month System Running Like One

A furnace works half the year. A heat pump works all of it, which makes annual service matter more, not less. Our Gold Care Club membership is $49 a month or $499 a year and includes two precision tune-ups a year, priority scheduling, 15% off repairs, an extended warranty on installations, and a loyalty credit toward a future replacement. For a homeowner putting in a new system, the warranty and the tune-ups are the two that pay for themselves first.

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Heat Pump Questions Long Island Homeowners Ask

  • Do heat pumps work in Long Island winters?

    Cold climate air source heat pumps are rated to produce heat well below freezing and handle the great majority of a Long Island heating season on their own. For the coldest nights, a correctly sized system uses backup heat, or a dual-fuel setup hands off to an existing furnace or boiler. The system has to be sized by load calculation for either approach to work.

  • Can a heat pump replace my oil boiler?

    In most cases, yes. A house with ductwork can move to a ducted heat pump, and a house on baseboard, radiators, or radiant floor loops can move to an air-to-water heat pump that feeds the existing hydronic distribution. A third option keeps the oil boiler in place as dual-fuel backup while the heat pump carries the house through most of the winter.

  • Is a heat pump cheaper to run than oil heat?

    A heat pump moves heat instead of burning fuel, so it delivers several units of heat per unit of energy drawn, where combustion equipment cannot exceed one. Whether that translates to a lower bill in a specific house depends on the home's heating load, the equipment selected, and local oil and electricity prices, which is why the comparison is worth running on your actual numbers before you decide.

  • What is the difference between a whole-home heat pump and a ductless mini-split?

    A whole-home heat pump replaces the heating and cooling for the entire house, using either existing ductwork, multiple ductless zones, or the home's hydronic piping. A single-zone mini-split is a targeted solution for one room or area, such as a converted attic, a room addition, or a space the ductwork never reached. The first is a system replacement; the second is a comfort addition.

  • How long does a heat pump installation take?

    A whole-home heat pump is typically a multi-day job covering equipment removal, installation, electrical work, permits and inspection, and commissioning in both heating and cooling modes. The exact schedule depends on the configuration and any electrical service work required, and we put the timeline in writing with the quote.

  • Who installs heat pumps in Nassau County?

    At Gold Star Home Service we install and service air source heat pumps, including cold climate ducted whole-home systems, ductless systems, and air-to-water systems, throughout Nassau County and nearby western Suffolk. We dispatch technicians who are professionally trained and perform all work under our company's Master Plumbing and HVAC licenses 7 AM to 7 PM, seven days a week (standard rates apply with no overtime charges), from our base at 200 Engineers Drive in Hicksville. We are available 7 AM to 7 PM, seven days a week, with no overtime charges. If you call after 7 PM, our automated system will take your details, and we will book your service for the first available opening the next morning.

Price Two Replacements, or Price One System

If your boiler or furnace is near the end and the central air is not far behind, this is the year the math changes. Call 516-409-8555 or book online, and we will run the load calculation and put a written flat-rate number in your hands before anything is approved. Technicians are dispatched 7 AM to 7 PM, seven days a week, with standard rates applying and no overtime charges. We are available 7 AM to 7 PM, seven days a week, with no overtime charges. If you call after 7 PM, our automated system will take your details, and we will book your service for the first available opening the next morning.