Oil to Gas Conversion vs Heat Pump: Which Way Off Oil?
Oil to gas conversion vs heat pump: compare what each project involves, gas line availability, cooling, incentives, cost factors and long-term outlook, with picks for North Shore homes leaving oil.
Choosing between an oil-to-gas conversion and a heat pump? An oil-to-gas conversion replaces oil heat with a natural gas boiler or furnace connected to a utility gas line. A heat pump replaces or supplements oil with an electric system that heats and cools. For North Shore homes leaving oil, the oil to gas conversion vs heat pump decision depends on gas availability on your street, your heating system and whether you want air conditioning.
Key Takeaways
- Gas needs a gas line. If your street has no main, conversion may not be practical.
- Conversion keeps a combustion system. You still need venting, yearly service and CO detectors.
- A heat pump adds cooling. Gas conversion does not.
- Incentives have shifted toward heat pumps. Check masssave.com for current offers.
- Both end oil deliveries. The difference is what you rely on next.
Oil to Gas Conversion vs Heat Pump: Side by Side
| Factor | Oil-to-gas conversion | Heat pump |
|---|---|---|
| Fuel | Natural gas from the utility | Electricity |
| Cooling | No, separate AC needed | Yes |
| Needs | Gas main on street, service line, meter, venting | Electrical capacity, outdoor unit location |
| Works with radiators | Yes, new gas boiler | Ductless heads, or air-to-water in some homes |
| Combustion and CO | Yes | None in the home |
| Efficiency | Up to about 95% AFUE or more | COP above 1 |
What Does an Oil-to-Gas Conversion Involve?
Converting is more than swapping a burner. Typical steps include:
- Confirming a gas main runs on your street.
- Having the utility, often National Grid on the North Shore, install a service line and meter.
- Installing a new gas boiler or furnace, or in some cases converting the burner.
- Venting changes, such as a chimney liner or sidewall vent for a high-efficiency unit.
- Removing or abandoning the oil tank.
New high-efficiency gas equipment is efficient. ENERGY STAR certified boilers and furnaces reach high AFUE ratings, and DOE rules taking effect in late 2028 will raise the minimum for most new gas furnaces to 95% AFUE. See DOE's guide to furnaces and boilers for how AFUE works.
Not sure if gas is even an option on your street? Request an oil conversion consultation and we will lay out both paths for your home.
What Does a Heat Pump Conversion Involve?
- A room-by-room load calculation to size the system.
- Ductless heads for radiator homes, or a ducted unit if you have good ducts.
- An electrical check, sometimes a new circuit or panel upgrade.
- An outdoor unit raised above snow depth.
- A decision on keeping the oil system as backup or removing it.
Per DOE guidance on air-source heat pumps, a heat pump can reduce heating electricity use by about 50% compared with resistance heat. Cold-climate models must deliver a COP of at least 1.75 at 5°F to earn the ENERGY STAR cold-climate label. Our guide to heat pump vs oil furnace compares heat pumps with keeping oil.
Oil to Gas Conversion vs Heat Pump: Cost Factors
- Gas conversion costs can include: service line, meter, new boiler or furnace, chimney liner or venting, tank removal, and a separate AC if you want cooling.
- Heat pump costs can include: equipment by zone, line sets, electrical work, mounting and optional tank removal.
- Incentives: as of 2026, Mass Save has focused incentives on heat pumps. Homeowners may qualify for rebates on qualifying heat pumps. Check masssave.com for current offers.
See typical ranges in our pillar on heat pump cost in Massachusetts.
Running Cost and Long-Term Outlook
Natural gas has long been cheaper than oil per unit of heat in Massachusetts. Heat pump running cost depends on electric rates and your home's efficiency. Neither price is fixed.
- Gas pros: strong heat on the coldest nights, familiar technology.
- Gas cons: still a combustion system, no cooling, and state policy is moving toward cleaner heat.
- Heat pump pros: heating and cooling in one system, no fuel on site.
- Heat pump cons: sizing and installation quality are critical in our winters.
Some utilities now offer seasonal rates for heat pump homes. See our guide to the Massachusetts heat pump electric rate.
Which Should You Choose?
- No gas main on your street: a heat pump is usually the practical path.
- Radiator home, want AC: ductless heat pumps, possibly keeping the oil boiler as backup at first.
- Gas available, boiler at end of life, no interest in AC: a high-efficiency gas boiler is a reasonable choice.
- Gas available and you want cooling: compare a gas boiler plus mini-splits against a heat pump-first setup.
Whatever you choose with gas, keep CO detectors on every floor. If you ever smell gas, leave the house and call the gas company or 911.
Get Both Options Priced Side by Side
The oil to gas conversion vs heat pump choice depends on your street, your house and whether you want cooling. Getting both priced on the same visit makes the decision much easier.
Jose has worked in HVAC since 2015 and installs both gas boilers and cold-climate heat pumps. HomePros will show you both paths. Get a written oil conversion estimate, or call (781) 426-8428. More in our heat pumps in Massachusetts guide.
Looking for the complete guide?
Heat Pumps in Massachusetts: A North Shore Homeowner's Guide