Greenwood Vireo G3 Filter for HR185WM & Zehnder CA185WM 400100031 Instead they constantly measure humidity

Instead they constantly measure humidity levels and only activate when man-made spikes in humidity - caused by showering

For instructions on how to reset the filter calendar or replace the filters on your unit please download the HR155WM Home Owners guide under the "technical" tab of this page and reefer to page 8 of the manual

Alternative switch ZGS2 provides 2 speed selection - Low or High only

no adaptors required Intelligent controller

High capacity 170/240m3/hr

Greenwood Vireo G3 Filter for HR185WM & Zehnder CA185WM 400100031 Instead they constantly measure humidityGreenwood 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