Grilles, Diffusers & Cowls

The extraction grilles here are sorted into internal and external although some are suitable for both. Diffusers supply air and the grilles normally extract. Most have a connection on the back for ducting but some require a plenum box. The roof cowls section also contains flashings etc for fitting.
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Reviews
Transformer (silent) speed controller - RE
Transformer (silent) speed controller - RE
£ 103.95

Unbelievable! With TDmixvent500: noise reduction minimum 50%...