CORE Hoophouse
CORE Hoophouse

CORE Hoophouse

The CORE hoophouse at Rock Bottom Ranch utilizes several passive-heating methods to maintain the temperature in the season extension structure without the need for fossil-fuels. A Subterranean Heating and Cooling System, or Climate Battery, circulates solar-generated heat around the structure, which is insulated on three sides and features a double layer of plastic on the south-facing side and roof to provide further insulation. 

The Climate Battery consists of two large tubes placed underground along both sides of the structure. Between those tubes 50 smaller, perforated tubes run underneath the entire greenhouse growing space. These tubes are covered with stone, which act as a heat sink and temperature regulator. Two low wattage fans inside the hoophouse are connected to the underground tubes and act as intake and outtake risers. The fans pull excess heat created in the greenhouse during the hot summer days and stores it underground, regulating the inside temperature so that our plants can enjoy a consistent climate that does not excessively overheat and does not freeze. The energy-saving system enables us to grow produce earlier in the spring and later in the fall and even provides a viable space for hearty plants to over-winter!

Thank you to Community Office for Resource Efficiency (CORE) for providing funding for this project and for supporting vegetable production at Rock Bottom Ranch.