The Vent-Axia Lo-Carbon SELV Humidistat, Timer & Pullcord Response Fan is perfect for kitchen, utility room and bathroom/toilet applications. The continuous running HTP model incorporates an adjustable (40% - 90%) ambient response humidistat. It has a constant volume dMEV unit with switched live (LS) and innovative digital display.    The fan increases the extract rate if the humidity rises above the point set at installation. Datalogger as standard. Quiet running and with high pressure development, the response fan is best in class.    It has comfort control - offering a more relaxing environment to the homeowner. The Lo-Carbon Response Fan features a delayed start option which is selectable at installation and allows the homeowner to enjoy a quiet, peaceful bathroom for up to 20 minutes before the Boost activates.   The Lo-Carbon SELV fan has boost activation - if the light switch turns On and Off within 3 minutes, the Boost will not activate. No more disturbing the family if the bathroom light is turned on during the night.   Following the introduction of the new Domestic Ventilation Compliance Guide within Part F 2010, the new Response fan from Vent-Axia provides the easiest install available.