RTUBU greenwood This means there is no

This means there is no need to hold or put down screws and covers

So if you have a S90B then this fan is its direct replacement and it will fit in the same space as your existing product and ducting

Auto ignition

NTC temperature sensor (T1/3) for Zehnder ComfoAir 200

RTUBU greenwood This means there is noInternal pipework limescale remover. Hidrox is a descaling treatment for use on closed water systems and cooling towers. By removing all scale and slime, its advanced formulation effectively clears the entire open water side of a system and so increases the systems efficiency. For absolute ease of use, a PH indicator dye shows when the descaling process is complete.