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Duct size 150mm Long life filter included
Chrome & Anthracite covers
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
4E is a modern update of Greenwood Centair/CML offering improved energy efficiency
Filters will eventually become blocked with residual debris and should then be replaced
Zehnder MVHR.90 Filter Set, ISO Coarse (G3), 2 pcs 500-1000 Duct size 150mm Long lifeZehnder Filter Sleeves For MVHR 90 & 91 Consisting of 2 X Filters each 38cms x 19cms Ideally, filters should be inspected monthly and given a light vacuum to remove dirt and debris. Filters will eventually become blocked with residual debris and should then be replaced. Generally, blocking will occur every 6 12 months depending on the location (near busy roads or inner city areas tend block more quickly than remote country settings).
