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How the system works

Brine defroster is ground heat exchanger that has been developed to use with heat recovery ventilation units. During cold winter season energy generator will prevent ventilation unit heat exchanger from freezing and damaging. During hot summer period it will cool the incoming air and generate pleasant indoor environment. A “GHT” Brine defroster uses a geothermal heat collector which transfers geothermal heat from the ground to the air in ventilation system.


Winter period

In the very cold winter energy Brine defroster heats up incoming air to ensure proper operation of the ventilation unit. Brine defroster  uses ground heat, that has in a depth of 1,5 to 2,5 m a temperature of +5 oC to +8 oC.

By consuming 0.05kW of power the gain is up to 5kW of heating power.

  Summer period
Brine defroster uses ground coolness that has a temperature +10oC to +14 oC in a 1,5 to 2.5m depth of the ground, ensuring cooling of the incoming air.

 By consuming 0.05kW of power the gain is up to 5.5kW of cooling power.


Winter period

No need to use electrical pre-heaters.

Summer period

Ensures comfortable indoor climate.

No need for other centralized cooling units.

Brine Circuit

The energy generator uses a geothermal heat collector which transfers geothermal heat from the ground to the air streaming through the brine-defroster. The geothermal heat collector consists of a PE-pipe. The length of the PE pipe depends on local conditions, e.g. type of soil or ground water level. Compact and loamy soil is able to transfer more heat to brine than loose, sandy soil. If the pipe lays below the ground water level, the brine absorbs more energy from the soil. Please be sure to only regard the length of the pipes in the ground when calculating the pipe length. The length of the pipes in the building has no influences on how much energy can be absorbed. The length of the pipe can double in sandy soils.

The geothermal heat collector can either be installed in an open space or a trench system, depending on the size of the property. The pipe has to be laid horizontally in the ground, the perfect depth is 1,5 to 2 m (but not deeper than 5 m). The distance between the pipes should be 0,8 m minimum. The highest point of the brine circle is the vent of the brine-defroster's float vent

Vertical drill can be used as energy source. Required depth of the drills has to be calculated by installer.

In some occasions as energy source ground heat pump brine circuit can be used.

Brine defroster Fahrenheit

  Product information (flyer) 

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