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• The unit is used improperly
• The defects occur as a consequence of an incorrect connection, improper use, or from system contamination
• Unauthorised changes or modifications to the system are made
Liability
The FOCUS unit has been developed and produced for use in what are known as comfort ventilation systems. Every
other form of use is deemed “improper use” and can result in damage to the FOCUS unit or in personal injury, for which
the manufacturer cannot be held liable. The manufacturer shall not be liable for any kind of damage that can be
attributed to the following causes:
• Failure to observe the instructions listed in this manual pertaining to safety, operation and maintenance
• Improper installation
• Installation of spare parts that were not delivered or stipulated by the manufacturer
• Defects as a consequence of an incorrect connection, improper use or from system contamination
• Normal wear
2 Instructions for the user and qualified personnel
Product description
The FOCUS unit is a ventilation unit with heat recovery for healthy, well-balanced and energy-saving comfort
ventilation. A comfort ventilation system extracts foul-smelling waste air from areas such as kitchens, bathrooms and
toilets and conveys an identical quantity of fresh air into living rooms, bedrooms and children's rooms.
For heat recovery, the unit types in the FOCUS 200 Base HRV series feature highly efficient cross-counterflow heat
exchangers made from plastic. An optional summer box module can be used instead of the heat exchanger for thermal
separation of the two airflows. The housing is made from sheet metal with an anthracite powder coating. The high-
quality polypropylene inner lining ensures the necessary thermal insulation and unit soundproofing.
The FOCUS unit has two maintenance-free 230 VAC centrifugal fans with an integrated power supply unit and
electronic commutation. The fans run at a constant volume flow to keep the air volume constant at any selected fan
speed. The air volume is not affected even if the filters become soiled.
Inside the unit, there is one filter with filter class ISO coarse ≥ 70% (G4) for the outdoor air and another one for the
extract air. These consist of a synthetic non-woven filter medium with a polypropylene frame. As an option, filters with
filter class ISO ePM1 ≥ 60% (F7) can be used for the outdoor air. The filters are accessed via the front panel.
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