Homes at Ocean Grove use a geothermal heating and air-conditioning system.
Unlike fossil fuels which are subject to escalation, this geothermal system provides home owners with a set price for all of their heating and cooling needs of 50 cents per-square-foot annually for 25 years, through an agreement with Terasen. In addition to the attraction of a low fixed rate, geothermal systems also help reduce greenhouse gas emissions. Geoexchange systems are highly efficient, requiring 75% less energy than conventional heating systems.
How do Geothermal Systems work?
Geothermal systems use the energy stored in the earth to warm or cool buildings. The geoexchange system works by running liquid though a closed loop of pipes drilled deep into the ground.
The pipes draw warmth from the soil and transfer that energy through a heat exchanger. A heat pump in each home then provides the level of warmth required which is then distributed through a standard ducted air system.
In the summer this system is reversed. To keep buildings cool, warm air is drawn from the building and transferred back through the pipes into the ground where it is absorbed.