Logo | Diamond Mechanical

Top-Quality HVAC Products in New Hampshire and Southern Maine

Explore our selection of top-quality HVAC products, from energy-efficient systems to cutting-edge technologies.

Mitsubishi Electric

Ductless Mini-Split: Unmatched Quality, Uncompromising Control

Mitsubishi Electric is the top-selling brand of zoned air conditioning and heating systems. You will enjoy cleaner air and superior control of cooling, heating, and your monthly energy bill. In addition to being quiet, intelligent, and efficient, our systems provide extraordinary service life for a lower cost of ownership.

Bryant Heating & Air Conditioning

Conventional Air Conditioning and Heating Furnaces

The Bryant Heating and Air Conditioning product lineup represents one of the most comprehensive in the industry. It also represents the forefront of comfort, efficiency, durability, and innovation. Together, we are creating a revolution in home comfort.


Oil Boiler w/ Riello Burner

The TRIO results from 50 years of engineering and manufacturing experience. With its low mass design and efficiencies of up to 87% AFUE, TRIO addresses growing concerns about fuel prices. Recirculating flue gas technology reduces fuel emissions and sets the standard for environmental integrity. The TRIO is constructed of GG20 cast iron for greater durability and thermal shock protection.

The TRIO is a low-mass boiler with steel push nipples. This manufacturing process is a better engineering technique than boiler sections, assembled with gasket materials. The low water content makes this boiler more efficient. A description of a British Thermal Unit (BTU), “the amount of heat required to raise 1 pound of water 1 degree Fahrenheit,” shows that a boiler holding less water will be more efficient, especially considering that a gallon of water is over 8 pounds.

Call Now Button