Veteran-Owned & Operated

SZADIS HEATING SERVICE, LLC

Sales • Service • Installation

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Side of a white service van with 'Szadis Heating Service, LLC' logo and contact information, parked on a residential street with houses and trees in the background.

Welcome to Szadis Heating Service

Massachusetts’ Best Heating Service Company

With over 30 years of experience, Szadis Heating Service proudly delivers trusted heating solutions throughout the Merrimack Valley and North Shore areas of Massachusetts. As a veteran-owned and operated business, we’re built on reliability, integrity, and a commitment to exceptional service every time.

Image of a furnace that Szadis Heating Service installed.

Our Services

Expert installation, maintenance, and repair to keep your system running safely and efficiently all winter long.

Boilers & Furnaces

A vertical, gray water heater with various labels and pipes connected to it, installed in a basement or utility room.

Dependable hot water solutions from new installations to replacements and repairs.

Water Heaters

A large oil tank mounted on legs in a basement or utility room.

Safe, compliant tank installations, replacements, and removals by experienced professionals.

Oil Tanks

Image of heating installation.

We’ll help you choose the right heating system for your home and handle the entire installation start to finish.

System Sales & Installation

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Emergency 24/7 On-Call Service

No Heat? No Problem. We’re Always On Call.

Heating issues can happen anytime, and when they do, Szadis Heating Service is ready. Our team is available 24 hours a day, 7 days a week to restore your heat quickly and safely.

Call Now for Immediate Service!

Why Choose Szadis Heating Service

Veteran-Owned & Operated: Built on honesty and integrity.

Local & Trusted: Proudly serving Merrimack Valley and North Shore areas in Massachusetts.

Customer-First Approach: We treat every home like it’s our own.

30+ Years of Industry Experience: Proven expertise and quality workmanship.

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Completed Installs

A completed install with various plumbing, heating, and water system equipment, all mounted on a wooden wall and concrete floor.
A commercial HVAC furnace system with a metal duct, a water heater in the background, and an electrical panel on the side, situated on a concrete floor in a basement utility area.
Copper piping, a boiler, water heater, and gauges in a utility room.
A completed install with a network of copper pipes, a large water heater, a green boiler, and various gauges and valves.
A boiler system installed in a basement with copper and black pipes, a pressure gauge, and a large gray expansion tank, next to a wooden cabinet.
View of a utility room or basement with plumbing, a boiler, and various pipes, valves, and equipment.
A boiler heating system with copper pipes, a blue Buderus boiler, a gray water heater, and various valves and gauges in a basement or utility room.

Whether you’re upgrading your heating system, replacing an oil tank, or facing an emergency, we’re here to help.

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