German made Ruck rkw extractor fans the "rkw" range come with a built in thermostat allowing automatic temperature control by your fans, when the room heats up... the fan speeds up, and vice versa, highly recommended!

Ruck RKW 100mm 4" Automatic extractor fan Ruck RKW Automatic Temperature controlled extractor fan, built in adjustable fan controllers and thermostat, instantly speeds up and slows down depending on the temperature. £109.99	Ruck RKW 125mm 5" Automatic extractor fan Ruck RKW Automatic Temperature controlled extractor fan, built in adjustable fan controllers and thermostat, instantly speeds up and slows down depending on the temperature. £114.99
Ruck RKW 150mm 6" Automatic extractor fan Ruck RKW Automatic Temperature controlled extractor fan, built in adjustable fan controllers and thermostat, instantly speeds up and slows down depending on the temperature. £119.99	Ruck RKW 200mm 8" Automatic extractor fan Ruck RKW Automatic Temperature controlled extractor fan, built in adjustable fan controllers and thermostat, instantly speeds up and slows down depending on the temperature. £129.99
Ruck RKW 250mm 10" Automatic extractor fan Ruck RKW Automatic Temperature controlled extractor fan, built in adjustable fan controllers and thermostat, instantly speeds up and slows down depending on the temperature. £134.99