Heating & Air Conditioning
A full-service HVAC company for the South Shore. Williams Energy installs, maintains, and repairs heating and cooling systems with the local know-how of a company that has kept homes comfortable since 1919.
Heating and air conditioning is where comfort and your energy bill meet, and Williams Energy handles both ends of it. We install, maintain, and repair heating and cooling systems for everyone in our service area, not only our fuel customers the way some companies do. Whether you are facing a breakdown tonight or planning a high-efficiency upgrade, every part of the job runs through one local team.
Comfort That Pays You Back
Today's oil and gas heating systems start paying off the moment you turn them on, with efficiencies of 95% and higher. If you are running an older system, a new one can cut your energy bills sharply. We are a true full-service HVAC company, so we do not just drop in equipment and disappear. We size it correctly, install it to code, and keep it running for as long as you own it.
Converting from heating oil to natural gas with a new furnace or boiler? We manage that whole project from the first measurement to the final start-up.
Heat or AC Down? We Move Fast.
No heat on the coldest night, or the AC quits in a heat wave? Our technicians reach South Shore homes quickly and fix the problem right the first time, on heating and cooling equipment alike.
Explore Our Heating & Cooling Services
Every service below is handled by Williams Energy, grouped so you can jump straight to what your home needs.
Heating
Furnaces, boilers, and whole-system work, from a planned upgrade to a no-heat emergency, including oil-to-gas conversion.
Cooling
Beat the coastal humidity with cooling that fits your home, from central air to a ductless retrofit or a heat pump that cools in summer and heats in winter.
Plans & Savings
Keep your costs predictable year to year, and claim every incentive a new system qualifies for.
How We Work
A comfort system is a long-term investment, so we treat it like one. We start by sizing the equipment to your home rather than selling you the biggest unit on the truck, because an oversized system short-cycles, wears out faster, and costs more to run. From there our trained technicians install to code, walk you through how the new system works, and stand behind it with maintenance and repair down the road.
It is the same approach whether you are replacing a tired boiler, adding central air to a house that never had it, or moving to a heat pump for year-round efficiency. One local team, one number to call, and no handing you off to a subcontractor you have never met.
Why the South Shore Calls Williams for HVAC
Because Williams Energy has worked the South Shore since 1919, we are also the same local team that delivers your heating oil and propane and installs your water heater on the plumbing side. That means one company for the whole home, technicians who know the area, and a phone that gets answered when the weather turns.
Here is why neighbors choose Williams, or contact us for installation, maintenance, or repair.
Trusted by South Shore Neighbors
“I am 100% happy to have found this company! From starting an account to having our furnace fixed has been the easiest and most efficient process, and it was well below the price of another quote. We are happy new customers and we thank you!”Aleta B., South Shore customer
Heating & Cooling Questions, Answered
What heating and air conditioning services do you offer?
Williams Energy is a full-service HVAC company. On the heating side we install and repair furnaces, boilers, and full heating systems, including oil-to-gas conversion. On the cooling side we handle central air conditioning, ductless mini-splits, and heat pumps, plus service plans and rebate help across the South Shore.
Can you convert my home from oil to gas heating?
Yes. If you are converting from heating oil to natural gas, we handle the full furnace or boiler installation from start to finish, so the project is managed by one team rather than juggled across several.
How efficient are new heating systems?
Today's oil and gas systems reach efficiencies of 95% and higher, which means more of every dollar turns into heat. If you are replacing an older system, the drop in your energy bills is often the most noticeable change.
Do you help with rebates?
We do. Whatever equipment you purchase from us, we work with you to claim any available rebates so a high-efficiency upgrade costs less up front. It is part of how we make new equipment easier to say yes to.
Do I have to be a delivery customer to get HVAC service?
No. We serve everyone in our South Shore service area, not just our fuel delivery customers. Whether or not you buy oil or propane from us, you can call Williams Energy for heating and air conditioning work.