Gilford Well Co

The Harris family has five generations of well drilling experience and has owned and operated Gilford Well Company for over 50 years. Prior to Gilford Well Company, the Harris family owned Bay State Artesian Well Co. in Concord, New Hampshire, and East Providence Well & Supply Co. in East Providence, Rhode Island. Through these companies the Harris family has drilled wells from the top of Mt. Washington to Cuba and throughout the eastern United States.   As the equipment in the industry has changed over the years, one thing has stayed consistent, the Harris family's attention to detail and quality workmanship.

Full Service

Gilford Well Company is considered to be a full service water company. We offer services such as well drilling, pump installation, water testing, filtration, landscape irrigation system installation and maintenance as well as water system operation for community and non-community systems. All of our work is done by our own trained professionals.    

Geothermal Heating & Cooling Systems

We can help! An environmentally-friendly geothermal heating system may be the answer to your high heating costs. According to the U.S. Environmental Protection Agency (EPA), geothermal systems are 'the most energy-efficient, environmentally clean, and cost-effective space conditioning systems available today.' These extremely high levels of efficiency are possible because a geothermal heat pump only uses electricity to move heat, not produce it.  

How Do Geothermal Systems Work?

Water is circulated through the earth and acts as a heat transfer medium. In the winter, heat is transferred from the earth to your home, and in the summer, heat is transferred from your home to the earth.  

• Open-loop geothermal system includes a groundwater well (or wells), a water well pump, piping and a compressor [heat pump] installed in the structure. In this type of system, groundwater is used as the heat transfer fluid and is pumped out of the well, and circulated through the structure's heat pump where heat is extracted from or injected into the water. Then the heated/cooled water is re-injected into the same groundwater well from which it was withdrawn or a separate well dedicated to re-injection.
• Closed-loop geothermal system. In these systems, an antifreeze solution is circulated through a continuous loop of plastic or copper pipe, which is installed in either a drilled well, horizontal trench or the bottom of a surface water body. Similar to the open-loop system, heat is either injected into or extracted from the antifreeze by the heat pump; after which, the fluid is re-circulated back into the loop of pipe installed in the ground.