Hire Our Local HVAC Contractors to Service Your System

We take pleasure in serving our community

Choose a Local HVAC Contractor With Over 10 Years of Experience

We offer prompt and professional HVAC services throughout Exeter & Portsmouth, New Hampshire and Southern Maine

The last thing anyone wants is to have their heating or cooling services fail them when they need it the most. Let our local HVAC contractor team at Diamond Mechanical help keep your home or business comfortable all year long. With over 10 years of experience, we can install, repair or replace a wide range of HVAC systems.

We proudly serve Exeter, Portsmouth, NH and surrounding areas. Rest assured that all of our customers receive small-town service with big company results.

Call now for a free estimate on our heating and cooling services.

Serving residential and commercial clients

At Diamond Mechanical, we offer a variety of HVAC systems from different brands. For residential and commercial clients alike, all of our customers receive reliable and honest advice from our local HVAC contractors about which products fit their needs.

We offer repairs, maintenance and installations for:

  • Boilers
  • Furnaces
  • Mini-splits
  • Water heaters
Call us at 603-580-4844 for a free estimate.

Keep HVAC systems in peak condition with our expertise

Our experienced local HVAC contractors are dedicated to providing the service our customers need to keep indoor spaces cool in the summer and warm in the winter. We are available day or night for emergency repairs. Our skilled contractors can work on oil, gas or propane systems.