Aprilaire Automatic Whole-House Bypass Humidifier with Digital Control Model 600
Although this model can also be purchased with everything needed for fully automatic operation, we've chosen to include the Aprilaire Model 600 without that capability for those who would rather pay less and have manual controls. The Model 600M lacks the outdoor sensor of its automatic counterparts with some users believing the outdoor sensor doesn't do a good enough job of contributing to effective regulation of humidity levels (and end up using the unit in manual mode).
By going with the manual control setup, you can save money not only on the initial cost of the unit, but the added cost of installation due to more components, and the cost of potential malfunctions as well. Beyond this, the Model 600 performs much the same as Aprilaire's other excellent humidifiers. It’s rated to provide .70 gallons of humidity per hour to a home of up to 4,000 square feet in size, and uses evaporative technology to conserve water.
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- Aprilaire Automatic Whole-House Bypass Humidifier with Digital Control Model 600