EMiB, Ventilation

This heat exchanger has a filling mass serving as a short-term heat accumulator, through which a hot and a cold gas flow alternately. Heat is first transferred from the gas to the heat accumulator and then released again to the gas glowing through subsequently.

e.g. heat wheel

• high efficiency

• low risk for frost

• high annual efficiency

• leakages from extract air to supply air

• maintenance (filters)

A recuperator is a type of heat exchanger that has separate flow paths for each fluid throughout its passages and heat is transferred through the separating walls. Most recuperators operate as counter-flow or cross-flow heat exchangers.

• to avoid frost, the efficiency must be reduced in cold days

• lower annual efficiency

• no transportation of smell or pollutants