**[National Equipment Parts (via Amazon.com)](http://www.passwird.com/links/dqgodi)** has the Aprilaire 500 Whole House Humidifier w/ Auto Digital Control Bypass Damper for **$125.79** with free shipping. Positive customer reviews.

* Includes automatic digital control, outdoor sensor, water pad, 110V to 24V transformer, and biult-in bypass damper.
* The Aprilaire 500A will cover up to 3000 sq ft.
* This unit has a waterfeed rate of 3.0 GPH and will deliver an evaporative rate of .5 GPH