Redmond HVAC
P.O. Box 2833 , Worcester, Massachusetts, United States

Timothy Redmond founded Redmond HVAC in 1987 after working many years in the Heating, Ventilation, Air Conditioning and Refrigeration (HVAC) field.  We are a full-service company offering high quality equipment. All of our systems are designed using the most up-to-date engineering software for both heating and cooling load calculations, along with duct work sizing and layout. We are continuously involved in meeting the needs of our customers—both new and existing.

Redmond HVAC offers a full range of services for residential and commercial applications, including:

• Sales, Installation and Follow-Up Service
• GeoExchange Heat Pump Systems
• Mitsubishi Air-Source Heat Pump Systems
• Solar Hot Water Systems

Geothermal Systems

Geothermal solutions use the constant temperature found just below the ground’s surface to supply heat pumps with an energy source for heating or cooling.

 Department Of Energy

The US Department of Energy has singled out heat pumps as one of the most efficient forms of electric heating in moderate climates due to their ability to generate up to three times more heat than the energy they consume. Geothermal heat pumps, however, are not limited to moderate climates since they utilize the constant temperature of the earth to power heating, cooling and hot water systems. Heat pumps collect the heat inside a house and pump it outside to function as central air conditioners. Plus, they can use the excess energy produced in the HVAC process to generate hot water for domestic use. Using heat pumps to improve energy efficiency can also significantly reduce household electric bills.  Geothermal heat pumps (GHPs), sometimes referred to as GeoExchange, earth-coupled, ground-source, or water-source heat pumps, have been in use since the late 1940s. They use the constant temperature of the earth as the exchange medium instead of the outside air temperature. This allows the system to reach fairly high efficiencies (300% to 600%) on the coldest winter nights, compared to 175% to 250% for air-source heat pumps on cool days.  Although many parts of the country experience seasonal temperature extremes — from scorching heat in the summer to sub-zero cold in the winter—a few feet below the earth’s surface the ground remains at a relatively constant temperature. Depending on latitude, ground temperatures range from 45°F (7°C) to 75°F (21°C). Like a cave, this ground temperature is warmer than the air above it during the winter and cooler than the air in the summer. The GHP takes advantage of this by exchanging heat with the earth through a ground heat exchanger.  As with any heat pump, geothermal and water-source heat pumps are able to heat, cool, and, if so equipped, supply the house with hot water. Some models of geothermal systems are available with two-speed compressors and variable fans for more comfort and energy savings. Relative to air-source heat pumps, they are quieter, last longer, need little maintenance, and do not depend on the temperature of the outside air.  Even though the installation price of a geothermal system can be several times that of an air-source system of the same heating and cooling capacity, the additional costs are returned to you in energy savings in 5 to 10 years. System life is estimated at 25 years for the inside components and 50+ years for the ground loop. There are approximately 50,000 geothermal heat pumps installed in the United States each year.