The foundation has begun!

In addition to the work on the geothermal heat pump we have been getting started  on the foundation of our net-zero project in Durham.  The foundation for this project has included a combination of 10″ poured concrete walls (where significant retainage is needed)  and standard concrete block where the grade is less severe. The penetrations in the poured concrete wall show the large opening where our mechanicals,  (electric, plumb ... Read full post »

Geothermal Heat Pump installation

An exciting and energy/cost saving feature of our future “net-zero” project in Durham is the geothermal heat pump. Geothermal heat pumps are able to heat, cool, and, if so equipped, supply homes and buildings with hot water. A geothermal heat pump system consists of a heat pump, an air delivery system (ductwork), and a heat exchanger—a system of pipes buried in shallow ground. In the winter, the heat pump removes heat from the hea ... Read full post »