Oil-to-Gas Conversion in Commack, NY

Commack's late-1950s and 1960s houses heat with either an oil furnace tied to ductwork, often the same attic ducts used for central air, or an oil boiler feeding baseboard. The equipment type steers the conversion. A furnace is almost always replaced with a new gas furnace, and because many Commack homes run supply ducts through the attic, it is a good moment to have that ductwork checked for the dried seals and degraded flex duct common in this area. A sound cast iron boiler may accept a gas conversion burner; an aging one is usually replaced.

• Is gas on your street? Only National Grid can confirm that and tell you what a service line and meter will take.
• Which town are you in? Commack straddles Townline Road. West of it, contact Town of Huntington Engineering Services; east of it, the Town of Smithtown Building Department. K2 does not file town permits, so confirm requirements with your town before work is scheduled.
• Standard or condensing? A condensing furnace or boiler vents through the wall in PVC and skips the chimney. A standard unit usually needs a chimney liner, because gas exhaust is cooler and wetter than oil exhaust.
• What else goes on gas? A range, dryer or water heater changes the gas load and the piping layout.

Once National Grid confirms gas, we visit to assess the furnace or boiler, chimney, gas load and the piping route from the meter, then quote a burner conversion or new equipment. The utility schedules its own service line and meter work, which is usually the longest part of the timeline, so we never promise an install date. After the meter is set, we install the venting or liner, run and pressure-test the gas piping, install or convert the equipment, and commission it with you there. Your old oil tank is then removed or abandoned by a licensed tank company under town and fire marshal rules. If your water heater runs off the oil boiler, see our water heater page for gas options.

Because many Commack homes already have attic ductwork for central air, a cold-climate heat pump can also be a reasonable path off oil, giving heating and cooling from one system. Rebates on qualifying models are applied for through PSEG Long Island, and terms change, so check psegliny.com. We can walk through both options at the assessment.