The VELUX manually operated skylight provides comfort and energy savings with free daylight and natural ventilation. With unparalleled energy efficiency, VELUX skylights block approx. 80% of radiant heat. With a choice of blinds available (sold separately), heat transference can be minimised still further. Operation is performed with the ZZZ 201 winder handle for in reach installations or the ZCT 300 extension rod for out of reach installations (ZZZ 201 and ZCT 300 must be purchased separately).