(833) 603-4822
(833) 603-4822


At 603 Mechanical we know that long-term relationships aren’t built overnight, which is why the cornerstones of our business are quality and integrity. Also: True to our profession, we keep cool under pressure.

We’re your local experts – and we’ve always been local. With two N.H. natives at the helm, 603 Mechanical handles refrigeration repairs, heating and air conditioning issues, and we install upgrades that save you money and headaches. The fact is, we handle just about anything related to heating and cooling for residential customers and commercial clients. Keeping these systems humming is our business, and we’re ready to put our knowledge to work for you.

What’s hot should be hot. What’s cool should be cool. And when it’s not, dial up 603 Mechanical. You’ve got our number.

As recognized experts for all things refrigeration, heating and air conditioning for the South-eastern New Hampshire and the North Shore of Massachusetts, our customers have come to rely on us for expert, local service, 24 hours a day. We don’t take a vacation from your problems.

We offer a variety of maintenance services designed to address your unique HVAC needs and our rates are among the most competitive in the industry. In addition, we offer maintenance and service contracts. We will commit to you!

We value and appreciate the trust placed in us by our customers! Whether your project is big or small—when you see the white 603 Mechanical van pull up, you’ll know we’ll get the job done right the first time.

Have all your installations and repairs done by professionals. Whether you are a residential or commercial customer, you’ll be taken care of. We’re 603 Mechanical— N.H. natives with the human touch.