Ltpgtt series range is fitted with a vent axia m tech motor developed to improve performance and lower running costs and maintain t series rugged reliability with energy saving in mind tx models are supplied complete with an integral instantaneous automatic louvre shutter concealed behind the interior grilleltpgt ltpgtthe shutter can be set open with the fan motor switched off to provide natural ventilation without the security risk of an open windowltbrgtthis unique system