5.1° of fluid temperature drop @9gpm yields 28,600 Btus

There's (thermal) gold in them thar hills. Drill for it!

A 20-ton heat exchanger headed for the bottom of a sewer effluent pond

6' x 6' x 45" wide trenching for 7 loop runs

45" diameter Slinky® coils in silt @7'

Vertical Geo Borehole

Fusing Headers & Stubs

Solutions for Sustainability!

Join CaliforniaGeo

CaliforniaGeo’s mission is to unify and grow California’s geo heat pump industry and remove barriers to widespread deployment of geo heat pumps.  Get connected to the earth’s thermal battery!

Geo Basics

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 on the coldest winter nights.

Member Benefits

CaliforniaGeo members receive a variety of benefits designed to help them achieve business success in the growing ground source heat pump market in California. These membership benefits include:
  • Market Development
  • Business Development Tools
  • product Discount
  • Networking And Education

Join or Renew

Your membership and display in our business directory make you easier to find as a provider of interior building comfort.It shows you’re a supporter of renewable energy that’s sustainable. It helps us influence the regulatory rule book affecting GeoExchange® technology.Your membership helps our learning programs, and grows the potential list of satisfied geothermal customers.


We strive to turn California’s regulations and policies into green action by government, consumers, and businesses. These include the installation or retrofit of GHPs (geothermal heat pumps) to eliminate greenhouse gas generation by buildings, and to foster their achievement of LEED-certified ratings and a march toward carbonless ZeroNetEnergy, the most sustainable building option of all. Our advocacy is matched with increasing education and training to develop installation professionals and maintain quality standards for evaluation and measurement that prove performance of GHP technology.