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Alternative switch ZGS2 provides 2 speed selection - Low or High only
It is a system of whole house ventilation that supplies continuous ventilation and extraction from multiple rooms in single property simultaneously
It also comes with integral back draught shutter
The AXS100PC replaces the AX100 B and NDX100PC
Greenwood Vireo G3 Filter for HR185WM & Zehnder CA185WM under-50 Alternative switch ZGS2 provides 2Greenwood Vireo HR185FIL filter for the Greenwood Vireo HR185WM. Each set contains 2 x G3 filter.. Please note, when replacing filters on your Greenwood heat recovery unit it is always necessary to also reset the filter change timer on the unit otherwise the service light will not go out. These units work on a calendar timer basis and simply changing the filters will still present the same issue as the heat recovery unit has to be told by the user