Direct Exchange DX geothermal energy offers several different installation options that adapt to any need in existing buildings or new construction. These systems may also be connected to a ventilation or hot water heating system.

For applications that require very high temperatures, new technologies now allow water to be heated to 160F (71C), in a much more efficient manner than electric, gas or oil-fired boilers. Whether connecting to old hot water radiators or domestic hot water systems, DX systems provide you with the performance and versatility necessary to meet your expectations in terms of comfort and performance. In forced-air systems and radiant floor applications, a single DX system can meet your needs with multi-purpose units.

6 tonnes de géothermie DX installées pour chauffer avec air pulsé et planchers radiants.
6-ton DX geothermal system installed with forced air and radiant floor heating.


Thousands of properties around the world use Direct Exchange DX geothermal systems to provide user comfort both in the summer and in the winter. This technology is very popular in Europe and is becoming increasingly used in the United States and Australia. The system provides comfortable, uniform and stable temperature control year-round. In the summer, it is an excellent dehumidifier because of its colder internal exchanger (condenser) and long operating cycle. In the winter, unlike with a furnace, there is no large variation in temperature felt when the system is running. Moreover, heated air is warmer than the air from an outdoor heat pump since in the winter, the earth is a greater source of energy. For more comfortable and efficient heating, you can combine the DX system with a radiant hot water heating system, either with hot water radiant floors or radiator heating.

24 tonnes installées dans un centre communautaire
24-ton capacity, installed at a community centre

Thanks to its small size and technical simplicity, the system is composed of very few moving and breakable pieces. Maintenance is easy; diagnosis may even be performed remotely by a data acquisition card connected to the Internet.

By eliminating the use of a circulating pump, which is required in a conventional system to pump the antifreeze, the DX system offers yet another reason for its superior performance. This increases the system’s actual COP (Coefficient of Performance), which results in consumption that is 4 times less expensive than 100% electrical energy. The DX system’s COP is between 3.8 and 4.8 when it is heating, which is substantially higher than other traditional heating technologies that range between 2.8 and 3.5 in the winter.

In traditional geothermal systems that use antifreeze, the thermal exchange surface area must be increased: one ton of thermal exchange (12,000 BTU/hour) generally requires a borehole that is 175 feet deep by 6 inches in diameter.

Definition of COP : The COP, or Coefficient Of Performance represents the heat pump’s energy performance in heating mode. It corresponds to the ratio between useful energy (heat restored for heating) and energy consumed (invoiced) to run the heat pump. It is measured in a laboratory, according to specific standards. E.g.: A device consumes 100 Watts of electricity to produce 100 Watts of heat or cold at a COP of 1. A device with a COP of 3.5 will produce 3.5 times as much energy as it consumes. Therefore, the higher the COP, the higher its performance is and the lower the electricity cost will be.

thermopompe vue interieure

Please contact one of our technical consultants for more information on our various technologies and don’t hesitate to come visit our functional installations in our SHOWROOM. We have functional Direct Expansion technologies for heating and air conditioning and antifreeze geothermal installations on our premises in order for you to familiarize yourself with a geothermal system network.