Comfort in your own home.
You've been heating with oil for years. We've been delivering it for over a century. Tap into generations of South Shore expertise to keep your system running at its best — and see how much you could save by switching to Williams.
Solid Service Since 1919
Dear Neighbor,
You know your home. You know which rooms stay cozy and which one always runs a few degrees cool. You know the sound your boiler makes when it kicks on and the spot on the gauge where you usually call for a fill.
But even after years of heating with oil, there's always more to learn about keeping your system efficient, safe, and cost-effective — especially as equipment ages and fuel technology evolves.
Maybe you've been with the same oil company for a long time. Maybe you're wondering whether you're getting the best value, the cleanest fuel, or the service you deserve. Maybe you've started thinking about what a switch could look like.
That's where we come in.
At Williams Energy, we've been family-owned on the South Shore since 1919. For four generations, we've delivered heating oil, maintained and installed heating and cooling equipment, and handled plumbing, electrical work, and emergency service for families who expect more from their fuel provider.
We deliver premium ultra-low-sulfur heating oil and Bioheat — a cleaner-burning blend that works with your existing equipment. Our automatic delivery customers never have to watch a gauge, and our service plans keep systems running at peak efficiency year after year.
The information here is for homeowners who want to get the most out of their oil heat — whether you're already a Williams customer or considering a switch. Nothing overly technical. Just practical expertise from people who've been doing this for over a hundred years.
For now, the main thing is this:
You deserve a fuel provider that knows your home, your neighborhood, and your system. If you're ready to see the difference, we're ready to show you.
Warmly,
The Williams Family
781-843-0415
Make the Switch to Williams
New to Williams Energy? Switch to automatic delivery today and unlock our most generous welcome package — designed to give you better service, cleaner fuel, and real savings from day one.
On your first auto delivery
For the next 2 years
Heating Service Plan
Oil tank monitor
A/C Service Plan
System Review & Consultation
Homeowner's Knowledge Base
Practical expertise from over a century of keeping South Shore homes warm.
Reading the Tank Gauge
You've seen it a hundred times, but a quick refresher never hurts. The gauge reads in fractions, not exact gallons — and it can drift over time.
If your gauge reading doesn't match what you expect, it may be sticking or failing. Worth a professional look.
Automatic vs. Will-Call
Automatic: We track usage and weather to schedule deliveries so you never run low. Will-call: You watch the gauge and call when ready.
Switching to automatic delivery means one less thing to manage — and you'll never get caught short in a cold snap.
Cleaner Heating Oil
Heating oil has evolved. We deliver premium ultra-low-sulfur heating oil and Bioheat, which burns cleaner and reduces soot buildup in your equipment.
Bioheat goes into the same tank and runs through the same equipment — no conversion needed, just a cleaner burn.
Payment Options
Heating bills are easier when they don't surprise you. We offer a 10-month Budget Plan, AutoPay, and online account access.
How you pay and how you receive oil are separate decisions. The right combo makes it easy and predictable.
Oil Tank Awareness
Watch for blistering paint, rust, dents, or an oil smell — especially on older tanks. A tired tank is much easier to deal with before it fails.
Oil tank corrosion can work from the inside out, so the outside may look fine until a problem starts.
Cold-Weather Confidence
Cold weather asks more of the system. You may notice the tank level moving faster. This is normal — but it helps to plan ahead.
During cold weather, oil use can change quickly. If you're on will-call, check earlier than usual.
Service & Maintenance
Even a reliable system needs a checkup. Our service plans cover heating, cooling, and hot water equipment — and annual tune-ups keep everything running efficiently.
A regular tune-up can catch small problems before they become breakdowns, and keep fuel costs down.
Tank Replacement
Older steel tanks don't last forever. We install modern Roth double-wall tanks for long-term peace of mind.
A tank job is about sizing, placement, code, delivery access, and long-term peace of mind.
Whole-Home Support
We provide heating oil, propane, HVAC, plumbing, electrical, and generators. One local company for everything your home needs.
In many homes, comfort problems involve equipment, hot water, plumbing, or electrical, not just fuel.
Inside Your Boiler Room
You've relied on your boiler for years — but how well do you actually know it? Understanding these key parts helps you spot issues early and communicate clearly with your service technician.
The Oil Burner
This is where the magic happens. It mixes heating oil with air and ignites it to create the flame that heats your home's water.
Pressure & Temp Gauge
Think of this as your boiler's dashboard. It tells you the current temperature and pressure of the water inside the system.
Expansion Tank
As water heats up, it expands. This tank provides a safe place for that extra volume to go, protecting your pipes from too much pressure.
Circulator Pump
This is the engine that pushes the hot water out of the boiler and through the radiators or baseboards in your rooms.
Emergency Switch
Usually a red switch located at the top of the basement stairs or near the unit. It cuts power to the burner instantly if needed.
Flue Pipe
The "chimney" for your boiler. It safely carries exhaust gases out of your home. It's important to keep this area clear.
The Homeowner's Guide to Heating and Cooling
A comprehensive guide written and designed by Williams Energy's own Jeff Milton — packed with expert insights to help you get more efficiency, comfort, and value from your heating and cooling systems, whether you're due for an upgrade or just want to optimize what you have.
- • Heating and cooling fundamentals
- • Seasonal maintenance and safety tips
- • Expert guidance from a local pro
Download the Guide
Tell us where to send your free PDF guide.
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Seasonal Fuel Estimator
See how much heating oil your home typically uses each season — and how switching to Williams could change the math.
Adjust your home size, thermostat setting, and insulation quality to estimate your seasonal heating oil usage. This is a rough estimate for a typical New England winter. Actual usage depends on weather severity, boiler efficiency, and hot water usage.
Bioheat Impact Calculator
Williams Energy delivers Bioheat® fuel, a cleaner-burning blend that works with your existing heating system — no conversion needed. See how switching to a B20 blend can reduce your carbon footprint, cut soot buildup, and improve efficiency.
Bioheat works seamlessly in your current oil tank and boiler. You get a cleaner burn and lower emissions without the cost of a system conversion. A B20 blend can reduce CO2 emissions by approximately 16% and improve efficiency by about 3%, meaning less soot buildup and fewer service calls.
Keep Your System Running Strong
Your oil heating system has served you well — keep it that way. An annual tune-up improves efficiency, prevents unexpected breakdowns, and extends the life of your equipment.
- ✓ Clean and adjust burner components
- ✓ Replace fuel filter and nozzle
- ✓ Test safety controls and efficiency
- ✓ Inspect tank and fuel lines
Maintenance Tracker
Select the date of your last tune-up to see when your next service is recommended, and set an email reminder so you never miss it.
Questions Homeowners Ask Us
Considering a switch? Here are a few things experienced oil-heat homeowners often ask us.
How do I know if I'm overpaying for heating oil?
Price per gallon is only part of the picture. Delivery fees, will-call surcharges, and inefficient equipment all add up. Williams Energy offers transparent pricing, a 10-month budget plan to spread costs evenly, and automatic delivery so you never pay rush fees. Many homeowners who switch find they save money from the very first fill — especially with our new-customer discount of $0.50 off per gallon on the first delivery.
What's the advantage of switching to automatic delivery?
With automatic delivery, we track your usage patterns and weather forecasts to schedule deliveries before you run low. You never have to watch the gauge, call for a fill, or worry about running out during a cold snap. It's included at no extra cost, and our new-customer welcome package includes additional savings when you sign up.
Is Bioheat really better for my older equipment?
Yes. Bioheat is a blend of ultra-low-sulfur heating oil and renewable biodiesel. It burns cleaner, which means less soot buildup on your heat exchanger, nozzles, and filters. That translates to fewer service calls, better efficiency, and a longer life for your equipment — all without any modifications to your tank or boiler.
How do I know if it's time to replace my oil tank?
Steel tanks typically last 15 to 20 years. Watch for blistering paint, rust (especially at the legs and bottom), weeping, or an oil smell. Even if the outside looks fine, internal corrosion can cause a failure. We offer free system reviews and can tell you exactly where your tank stands — and if it's time, we install modern Roth double-wall tanks with long-term warranties.
What makes Williams Energy different from my current provider?
We've been family-owned on the South Shore since 1919. That means real people who know your neighborhood, 24/7 emergency service, and a whole-home approach — heating oil, propane, HVAC, plumbing, electrical, and generators all under one roof. We're not just delivering fuel; we're maintaining the systems that keep your family comfortable year-round.
Let's Talk About Your Home
Thinking about switching to Williams Energy? Have a question about your tank, delivery options, or service plan? Give us a call. No pressure — just a useful conversation with a local company that's been doing this for over a century.
Call Anytime: 781-843-0415
"A quick question now can prevent a bigger worry later."
Send Us a Message
Fill out the form with your name, email, phone, address, and message. We're interested in the special offer for new customers — includes $0.50 OFF first delivery, 2 years of fuel discounts, and free service plans.
Our Service Area
Providing solid service to the South Shore since 1919. With offices in Braintree and Marshfield, we're always nearby when you need us.
Towns We Serve
Braintree, Marshfield, Weymouth, Quincy, Milton, Randolph, Holbrook, Abington, Rockland, Hanover, Pembroke, Duxbury, Scituate, Cohasset, Hingham, Hull
Don't see your town? Give us a call. We may still be able to help or point you in the right direction.
Trusted by South Shore Neighbors
Hear from local homeowners who switched to Williams Energy and never looked back.
"After 15 years with another oil company, I switched to Williams. The difference was immediate — automatic delivery, fair pricing, and a technician who actually took the time to explain my system. Wish I'd switched sooner."
Sarah & Mark T.
Weymouth, MA
"Our boiler stopped working on the coldest night in January. Williams had a technician at our house in Hingham within an hour. You can't put a price on that kind of local reliability."
James R.
Hingham, MA
"We switched to Williams for the Bioheat and stayed for the service. It's so nice to have one company handle our heating, plumbing, and AC. Highly recommend to any South Shore homeowner."
Elena M.
Marshfield, MA