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Retrofit your Observatory with the useful Ventilation system. It reduces the possible condensation during humid wheather condition.
It contains two fan units which should be installed across at the wall or at the accessory bays. One fan system suck in the fresh air and the second one blows it out.
Note that at each point of installation a 220V power socket need to be installed in order to source the fan systems. Alternatively the fans can be sourced with 6 to 12 Volt 1,0 Ampere DC current.
