Daikin Altherma outdoor heat pump installed at a Long Island home

Lose the boiler. Keep the radiators.

Oil Boiler to Heat Pump Conversion on Long Island

If your oil boiler is getting older, Daikin Altherma may be able to replace it with an all-in-one air-to-water heat pump system that heats your home, supports cooling, and can make domestic hot water.

A Different Path for Oil-Heated Homes

Long Island still leans hard on oil heat, with roughly 214,000 Suffolk County homes still burning it. Most oil-to-heat-pump conversations out here start with ductless mini-splits. Those can be a good solution, but they are not the only option.

Daikin Altherma is an air-to-water heat pump. Instead of making warm air directly, it makes hot water. That means it may be able to connect to the kind of hydronic heating many oil-boiler homes already use, including baseboard, radiators, radiant floors, and hydro-air.

For the right home, the goal is simple: replace the oil boiler without throwing away the comfort of water-based heat.

What an Oil Boiler Conversion Has to Account For

An oil boiler replacement is not just an equipment swap. A proper design looks at the whole home.

Heat loss on cold Long Island design days
Baseboard, radiator, radiant floor, or hydro-air capacity
Water temperature your existing radiation needs
Whether domestic hot water should be included
Whether cooling is part of the project
Electrical panel size and available capacity
Space for indoor Altherma equipment
Piping complexity near the existing boiler
Removal of the oil tank and old boiler
Whether backup heat makes sense

Why Daikin Altherma Is Worth a Look

Daikin Altherma gives oil-heat homeowners a more familiar kind of heat-pump conversion. It keeps the conversation centered on water, piping, and emitters instead of asking every room to take a wall head.

It may also reduce the number of separate systems in the home. Depending on the design, Altherma can support space heating, cooling, and domestic hot water from one coordinated system.

That does not mean every oil-heated home is a fit. It means the right homes deserve a real review before defaulting to another oil boiler.

Good Candidates


You May Be a Good Candidate If

Your oil boiler is near end of life
You already have hydronic heat
You want to reduce or remove oil use
You are planning ahead instead of waiting for a no-heat failure
You are open to electrical and piping work if needed
You want a designed system, not a quick swap

What's my heat pump rebate?


See what homes like yours are getting

Most Suffolk County homeowners qualify for a $4,000 PSEG rebate on a whole-home heat pump. Homes in a disadvantaged community, or moderate-income households, get $5,000. Income-qualified homes get $7,500. We confirm your exact tier before you commit to anything.

Addresses in a disadvantaged community qualify for the $5,000 tier. Check yours on New York State's official map.

Think you may be income-qualified? You can check with Energy Finance Solutions.

Common Questions


Oil Boiler to Heat Pump FAQ

Daikin Altherma is an air-to-water heat pump. Instead of making warm air directly, it makes hot water. That means it may be able to connect to the kind of hydronic heating many oil-boiler homes already use, including baseboard, radiators, radiant floors, and hydro-air. For the right home, the goal is to replace the oil boiler without throwing away the comfort of water-based heat.

An oil boiler replacement is not just an equipment swap. A proper design looks at heat loss on cold Long Island design days, baseboard or radiator capacity, the water temperature your existing radiation needs, whether domestic hot water should be included, whether cooling is part of the project, electrical panel capacity, space for indoor equipment, piping complexity near the existing boiler, removal of the oil tank and old boiler, and whether backup heat makes sense.

Daikin Altherma gives oil-heat homeowners a more familiar kind of heat-pump conversion. It keeps the conversation centered on water, piping, and emitters instead of asking every room to take a wall head. Depending on the design, it can support space heating, cooling, and domestic hot water from one coordinated system.

No. Not every oil-heated home is a fit. It means the right homes deserve a real review before defaulting to another oil boiler. We will review your current oil boiler, heat distribution, electrical capacity, and goals before recommending the next step.

Start With a Fit Check

Patchogue Heating and Air Conditioning serves Patchogue, Suffolk County, and nearby Long Island communities. We will review your current oil boiler, heat distribution, electrical capacity, and goals before recommending the next step.

Related: Daikin Altherma hub · Heat pumps for radiators · Air-to-water heat pumps · Altherma cost factors

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