1994 Van Air Inc. Heatless Regenerative Compressed Air Dryer with Cycle Saver™ Controller. Model: HL-250. Capacity: 250 scfm. Overall tank dimensions: 17-1/2 in. dia x 54 in H. Van Air HL series heatless dryers offer protection of compressed air operated equipment and processes with features including continuous and sequential flow cycles at constant pressures, full automation, activated alumina desiccant, panel mounted tower pressure gauges and a panel mounted moisture indicator. The Cycle Saver™ controller Includes switching failure monitor LED and contact and minimizes purge to actual moisture load conditions for maximum savings, low operating cost and a -40°F dew point. Overall dimensions: 3 ft. 1 in. L x 2 ft. W x 7 ft. 7 in. H.(ACN125).