WAFE 350, User Manual

Page: 14 / 32

14 | WAFE 350 Energy recovery ventilation
Stoppers 03 04 05
Filter and heat exchanger stoppers are manufactured with the same care as the rest of the EPP
body. Do not be afraid to put more power into their handling and always make sure you plug
them in as far as possible.
Recovery ventilation
system
Heat exchanger and flaps 06 07
Heat exchanger inside your unit is the lat-
est iteration of the classic duct counterflow
type that has been improved and perfected
over the years and is still considered to be
the standard in air-to-air heat recovery.
Counterflow exchangers have the best pa-
rameters with regards to heat recovery ef-
ficiency and under normal conditions they
never need to be replaced.
An alternative to counterflow heat ex-
changers are the membrane exchangers
able to recover not only heat but also all
the healthy humidity back into your home.
This advantage is offset, however, by their
low efficiency, high freezing temperature
and the fact they need to be replaced every
5 to 6 years, thus increasing the costs of
ventilation rapidly (average price of new
membrane exchanger is about
670€ ).

Due to our unique Enthalpic Flap System ( EFS ™) WAFE 350 can recover both heat and
humidity with a standard duct counterflow exchanger. Thanks to EFS™ you get the
best of both worlds: low operating costs and reliability of the counterflow exchanger
and the ability to recover humidity like with newer membrane exchangers.

Another great advantage of WAFE 350 is elimination of the need to pre-heat the in-
coming fresh air: many other units do so at low temperatures to keep the water con-
densate inside them from freezing and to artificially increase their intake/outtake heat
efficiency levels. Needless to say, they do so at the expense of overall economy of the
unit’s operation.
Figure 06: Counterflow exchanger
provides a high effi-
ciency heat recovery.