Oil to Gas Conversion in New Jersey: Steps, Planning and What to Expect

Quick answer: An oil to gas conversion in New Jersey starts with confirming that a natural gas main runs on your street. Your gas utility then installs a service line and meter, a licensed contractor installs a new high-efficiency gas furnace or boiler with proper venting and gas piping, and your oil tank is removed or properly closed according to local rules. Permits and inspections complete the job. The best time to convert is before your oil system fails, so the utility work can be scheduled without a no-heat emergency. We install the new heating equipment; see furnace and heat pump installation and boiler installation.

Many homes in Ocean, Monmouth and Burlington counties were built with oil heat, and some still use it, especially in older neighborhoods and rural areas. As oil systems age, many homeowners ask whether switching to natural gas makes sense and what the process involves. This guide walks through it step by step.

Why homeowners switch from oil to gas

• No deliveries and no tank to monitor
• Less maintenance: gas burns cleaner, with no soot buildup
• Higher efficiency: modern condensing gas furnaces and boilers waste far less fuel than older oil equipment
• More space: removing an indoor oil tank frees up basement or garage space
• One fuel for several appliances: gas can also run a water heater, range or dryer
• Peace of mind: no risk of running out of fuel or of an aging tank leaking

For a full comparison, see gas vs oil furnace.

Step 1: Confirm gas is available

Call the natural gas utility for your town and ask whether a gas main runs on your street, what the service line process is and whether there are any charges. In some rural parts of our service area there is no gas main, and the alternatives are propane or a heat pump. See propane and oil heat vs heat pumps.

Step 2: Decide what equipment you need

Your choice depends on how your home is heated now:

• Forced air (ducts and vents): a new gas furnace, often high-efficiency, possibly with central air or a heat pump at the same time
• Hot water radiators or baseboard: a new gas boiler, or a tankless combi boiler that also makes your hot water
• Oil-fired water heater or boiler coil for hot water: a gas tank or tankless water heater, or a combi boiler

We size the new system for your home with a proper load calculation rather than just matching the old unit, which was often oversized. See how to size a furnace or heat pump.

Step 3: The gas service line and meter

The utility runs a service line from the main to your house and installs a meter. Timing depends on the utility's schedule, permits and season, which is why planning ahead matters.

Step 4: Installation

On installation day, a licensed contractor:

1. Removes the old oil furnace or boiler
2. Installs the new gas furnace or boiler
3. Runs gas piping from the meter to the new equipment (and other gas appliances if planned)
4. Installs the correct venting: high-efficiency equipment usually vents through plastic pipe out a side wall, while some equipment uses a lined chimney
5. Connects controls, thermostat and condensate drain
6. Starts the system and tests combustion, safety controls and carbon monoxide

Step 5: The chimney

When an oil furnace is removed, the chimney may no longer be needed, or it may still serve another appliance such as a gas water heater. A chimney that stays in use with gas equipment often needs a liner sized for gas. Venting must meet the manufacturer's requirements and local code.

Step 6: The oil tank

Oil tanks must be dealt with properly. Options typically include removal or closing in place, depending on the tank's location (basement, above ground or underground) and local and state requirements. Underground tanks have specific rules. Your municipality and a licensed tank contractor can explain what applies to your property. Keep the paperwork, since buyers and insurers may ask for it later.

Step 7: Permits and inspections

Heating replacements and gas piping require permits and inspections in New Jersey towns. A licensed contractor pulls the permits and coordinates inspections.

How long does it take?

The installation itself often takes one to a few days. Utility scheduling, permits and inspections can take longer, so starting early (ideally in spring or summer) avoids a winter rush. If your oil system fails mid-winter, we can talk through temporary options while the conversion is scheduled.

What affects the price?

• Furnace vs boiler vs combi boiler, and efficiency level
• Venting and chimney work
• Gas piping length and additional appliances
• Oil tank removal or closure
• Ductwork or radiator changes
• Any utility charges for the service line

We give a free estimate with a clear upfront price, and new systems qualify for $500 off (terms apply).

Planning tips

• Get the utility timeline first
• Convert before the oil system fails if you can
• Plan hot water at the same time: if your oil boiler makes your hot water, you need a new hot water source too
• Consider central air or a heat pump if you are replacing a furnace and ductwork anyway
• Ask about controls: a smart thermostat or zoning can improve comfort (see HVAC zoning)

Common questions during a conversion

Will my radiators or ducts need to change? Usually not. The new gas boiler connects to your existing radiators or baseboard, and a new gas furnace connects to your existing ducts. Sometimes small changes improve comfort, and we will point those out.

What about my water heater? If your oil boiler makes your hot water with a built-in coil, you need a new hot water source when the boiler goes. A gas tank water heater, a tankless unit or a combi boiler are the usual options. See tankless vs tank water heaters.

Can I keep the old system as a backup? In most cases the old oil equipment is removed during installation. Keeping two heating systems connected adds complexity and maintenance without much benefit.

Will there be a smell or mess? Removing an old oil system can be dusty and may briefly smell of oil. We protect the work area and clean up when we finish.

Does the conversion affect my home's value? Many buyers prefer gas heat and newer equipment, and records of a properly removed or closed oil tank help during a sale. Keep all permits and paperwork together.

Is a heat pump a better choice?

In homes where gas is not available, or where you want to cut fossil fuel use, a modern cold-climate heat pump may make more sense, sometimes paired with a gas or existing furnace as a dual-fuel system. Ask us to compare both. See heat pump vs furnace.

A simple conversion timeline

1. Spring or summer: call the gas utility and get a free equipment estimate
2. Utility visit: service line and meter scheduled
3. Installation day: new equipment installed, piping and venting completed, system started and tested
4. Tank work: oil tank removed or closed by a licensed tank contractor
5. Inspections: local inspections completed and paperwork filed

Get a conversion estimate

We are a family-owned, veteran-owned company led by a licensed NJ Master HVACR contractor (25 years of experience) and a founder with 40 years in heating and cooling. We install gas furnaces, boilers, combi boilers and heat pumps across Ocean, Monmouth, Burlington and Middlesex counties, including Manchester, Howell, Medford and Monroe Township. Book a free estimate online or call us.