Accessories
E
lectrical pre-heating element for frost protection
In longer periods of sub-zero temperatures, the high-efficiency counterflow heat
e
xchanger will ice up. To avoid icing, it is recommended that an electrical
preheating element is mounted.
The pre-heating element uses very little energy, but it ensures efficient heat
recovery without de-icing. You therefore achieve an overall reduction of energy
consumption.
Pollen filter
As a standard, the unit is supplied with a plate filter.
I
f anyone in the household suffers from a pollen allergy, you can install a pollen
filter in the outdoor air intake to minimize the proportion of pollen in the indoor
air.
A pollen filter also removes approx. 50 % of harmful particles in outdoor air, so a
pollen filter is recommended if you live in a large city or close to a motorway.
EM-box
With an EM box it is possible to divide the extract air between the kitchen and the
b
athroom.
If a cooker hood is connected to the unit and is switched on, extract air from the
bathroom will be reduced slightly to allow sufficient air for the cooker hood to
extract kitchen fumes.
The EM-box has a fitted metal filter that clears the air in the cooker hood of
grease particles effectively, and thereby protects the unit.
CO
2
sensor
Fitting a CO
2
sensor means the ventilation speed can be pre-programmed to run
higher ventilation levels in the event of high CO
2
level in the extracted air. CO
2
levels can be programmed.
Safety group
The safety group consists of:
T
he safety group, which is made of brass, consists of a stop valve with an integral
non-return valve, a safety valve and drain cock. It can be installed directly
beneath the hot water tank.
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