What Should You Do Before Switching From Oil to Gas Heat
Call your gas utility first to confirm a line runs to your street, then get two or three quotes from licensed heating contractors before you sign anything with your oil company. Do this in September, not November, because installers book up once the first cold snap hits.
Fall is the natural time to think about this. You are already having your oil tank checked and your heating system serviced before winter. That is the moment to ask a bigger question: does it make sense to switch systems instead of just servicing the old one.
Confirm Gas Is Actually Available
Not every block on Long Island has a gas main running past it. Some neighborhoods in Suffolk still run on oil because the infrastructure was never extended. Call National Grid or PSEG Long Island and ask directly whether your address can get a gas connection, and what the hookup fee looks like. Get this in writing or in an email confirmation. Do not assume because your neighbor has gas that you can too.
If gas is available, ask how far the main runs from the street to your house. Longer runs cost more to trench and can affect your driveway, your lawn, or a shared property line. Get this measured before you get quotes on equipment, because the trenching cost sometimes outweighs the equipment cost.
Get Your Oil Tank Situation Sorted First
You cannot just walk away from an oil tank. If it is above ground, it usually needs to be drained and removed. If it is underground, Suffolk and Nassau both have rules about abandonment or removal, and a buried tank left in place can become a problem when you sell the house later. Ask your contractor for a written plan for tank removal as part of the same job, not a separate afterthought.
Get the tank removal quoted in the same estimate as the new gas equipment. Some contractors will lowball the furnace and pad the tank removal, or the reverse. A single line item estimate that covers both lets you compare contractors fairly.
Compare Equipment and Ask About Rebates
A gas furnace or boiler is a different piece of equipment than what you have now, and efficiency ratings matter more than the brand name. Energy Star publishes efficiency ratings for furnaces so you can compare units apples to apples instead of trusting a sales pitch.
Check what NYSERDA offers in rebates for high efficiency heating equipment before you sign a contract. Some incentives require you to use a participating contractor, so ask about this before you pick who does the work, not after.
Ask each contractor for the same three numbers: total installed cost, the efficiency rating of the unit they are quoting, and an estimated timeline from signed contract to working heat. Contractors get busy in October and November. If you want this done before the first real cold spell, September is when you need contracts signed, not just estimates in hand.
Do Not Skip the Insurance Call
Your homeowners policy may have a line for oil tank liability. Ask your insurance agent what changes once the tank is gone. Some policies adjust premiums slightly when there is no oil tank on the property, and you want that reflected once the switch is done, not left as an old policy detail nobody updated.
This is also a good week to have your chimney or flue checked if your new gas equipment vents differently than your old oil system did. A contractor doing the swap should tell you whether your existing vent works for gas or needs to be replaced.
Start with the phone call to your utility this week. Everything else on this list depends on knowing whether gas is even an option at your address.