Count on us for around-the-clock, 24-hour emergency service from our certified technicians-just one part of the full-service difference.


P.Gagnon & Son gives you a range of choices for protecting your price for heating fuel and for controlling your winter fuel bills.


Our service technicians have the expertise to install, maintain, and repair virtually any make or model system you have or want in your home.


Feet in front of heater

Today’s Heating Oil

Heating oil has been keeping homes warm for almost as long as we’ve been around (that’s a long time) – ever since forced air heating systems were introduced in the 1920s.

Heating oil tank gauge

How to Read Your Heating Oil Tank Gauge

Reading your heating oil tank gauge is about the most basic maintenance task you can do for your home heating system – but it’s one of the most important…

Repairing thermostat

Should I Repair or Replace My Home HVAC System? (Part 2)

In part one of this two part post, we discussed some of the most important questions you should ask as you weigh repairing vs. replacing your HVAC system.

Pondering man

Should I Repair or Replace My Home HVAC System?

It’s a time every homeowner dreads – but one most will face if they live in one place long enough: an unexpected breakdown occurs on an older home HVAC system, and you’re left with choosing between fixing it and investing in an HVAC upgrade.

Price is what you get quote

Quality Equipment Installations – Every Time, Guaranteed

You get what you pay for.

It’s a phrase you’ve probably heard a thousand times in your life. We have, too.

Refer a friend

Satisfied with Your Service from P. Gagnon & Son? Why Not Refer a Friend and Save on Your Next Bill?

If you’re a happy P. Gagnon & Son customer, why not tell a friend and we’ll give you a $100 account credit* – or let us know so we can share your opinion with other customers?

Heating oil tank

Protecting Your Heating Oil Tank

Heating oil tanks have come a long way in recent years – many of today’s surprisingly high tech models feature plastic “tank-in-tank” designs that are virtually leak proof.

Managing propane tank

Winter Propane Safety Tips for Your Seacoast Home

Propane is one of most versatile and efficient ways to power and heat your home. It’s also one of the safest. But as with any fuel, you need to know what to do if you run into a problem with your propane system, especially in the winter.

Water heater set

Water Heater Replacement Basics

When it comes time to choose a new water heater, there are many options available to you.

Programmable thermostat

Four Reasons You Need a Programmable Thermostat

If you don’t have a programmable thermostat (or don’t know how to use yours properly), you’re missing out on one of the easiest ways to save 10 percent or more on monthly energy bills.