-Flow rates: 10 enclosure volumes/hour for active ventilation, substantially higher for

passive (wind permitting)

-Wind Gates: Open/close in 1 minute can resist 78 mph (35 m/sec) wind while open

-Air Conditioning: Maintains telescope structure at expected ambient nighttime

temperature.

-Mirror Surface Heating: 96 electrode pairs mounted on edge of mirror send electrical

current through mirror coating to warm the cooled mirror to match the ambient

nighttime air temperature. System can provide 50 Watts/square meter of mirror surface.