Case study No. 2: KVS laboratory building

Initial situation

Modern and regulatory compliant ventilation systems in the ventilation industry require a heat recovery system in order to use the waste heat from the exhaust air. Recirculation recovery is the heat recovery system of choice for ventilation systems where no cross contamination between the two sides can be tolerated.

The heat contained in one air stream is transferred indirectly to the other air stream via a liquid medium, and the supply and exhaust air heat exchangers can be positioned completely separate from one another. In a laboratory building, absolute separation of the is required to safely prevent the transfer of toxic and often corrosive chemicals to the supply air.


Standard air-to-water heat exchangers cannot permanently withstand the chemical attack permanently and lead to premature failure of the system. A completely and permanently corrosion-resistant heat exchanger should remove the heat from the exhaust air. Due to the changing laboratory operation, the type and concentration of the chemicals and the reaction products can hardly be determined with certainty, thus the heat exchanger must be able to withstand any chemical attack.


The Calorplast gas water heat exchanger made of all-plastic for cooling / heating aggressive gas flows consists of mass-produced, replaceable modules with smooth tubes. All parts are made of high-performance plastics and are welded together without any gaskets. The optimized tube arrangement guarantees maximum performance.


The heat recovery system can be operated for many years (up to several decades) without any problems and thus guaranteeing the planned amortization and the safety of the personnel.


The Calorplast gas water heat exchanger made of all-plastic for cooling / heating.