The diffusion-tight GEROtherm® REX geothermal probe prevents gaseous substances from penetrating into the heat carrier. GEROtherm® REX thereby guarantees the correct operation of the heat pump and protects it against damage from degassing.
As a material, polyethylene is not diffusion tight. Even the smallest amounts of gas can diffuse through the wall of the pipe. The gas is absorbed by the liquid (heat carrier) and is transported to the heat pump by the circulation of the liquid. Pressure is reduced by the difference in depth in the geothermal probe, which allows the gases to degas. The gas bubbles collect at the highest part of the primary circuit. This generally takes place in the heat pump, which can result in serious impairment of operation of the heat pump and also irreparable damage to it.
Use of the diffusion-tight GEROtherm® REX geothermal probe prevents the penetration of gaseous substances. The core pipe, which carries the medium, is made of state-of-the-art crack-resistant PE100-RC and is SKZ HR3.26-certified. The pipe’s diffusion-tightness is provided by the use of a polymer-matrix film with an integral diffusion barrier and it also features a scratch-resistant protective sleeve for mechanical protection. The diffusion-tight GEROtherm® REX geothermal probe is recommended for soil containing gas. It ensures riskfree operation of the geothermal probe system and protects the heat pump from irreparable damage.