An economic solution for the expansion of the wireless or wired units Vantage Pro2 or Pro2 Plus with the advantages of a active ventilation. Required by the use of the radiation energy during the day, only half of the cost, but has almost 75% of the effectiveness of the 24-hour actively ventilated radiation protection shield of Davis Instruments. The solar-powered fan is running during the day. As no batteries to support is available, the fan during the night, when the radiation effects are less. The kit contains as in the image shown a fan, the solar panel, additional exposure protection plates and mounting material.This text is machine translated.