Between 2004 and 2022, Netec manufactured brine-earth heat exchangers as additional components for central ventilation systems in residential and non-residential buildings. Due to age, the in-house production of the CWK 300 model was finished at the end of 2022. This device will be manufactured and sold from autumn 2023 by the Bauinfocenter Ventilation of SchwörerHaus KG. There you will also get the controller and a compatible pump group. For the time being, we will only deliver from Detmold the devices of the CWK Standard series and remaining stocks of our pump group PGR-2 as well as last  replacement filters.

Brine to air ground heat exchangers improve the efficiency of ventilation systems with heat recovery and increase the summer comfort. In the very cold winter they heat the incoming fresh air alone with the lukewarm brine from the ground without a heat pump and prevent the freezing of the ventilation unit.  In the hot summer, they cool the incoming hot fresh air  alone with the lukewarm brine  pleasantly without a cooling machine.

If you do not know yet the function of brine operated ground heat exchangers, look first to System Description.  How to install brine pipes under the house or around the cellar or in the garden, is shown in Installations. Our special components can be found in Products.

We wish you success in designing an enegry-efficient house with a mechanical ventilation system and with a ground heat exchanger.

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