• All-In-One Control – Controls temperature and Indoor Air Quality (IAQ) products such as humidification, dehumidification, ventilation, and air filtration monitoring – all from a single control in the living space
  • 7-Day Programming – Allows separate programming for each day
  • Touchscreen Interaction – Easy-to-follow menu-driven operation simplifies programming by responding to your choices
  • Smart Change/Check Reminders – Let you know when to service or replace filters, UV bulbs (based on actual usage) and humidifier pads
  • Energy Savings – Program to save up to 33% on annual heating and cooling costs (If used as directed; Savings may vary depending on geographic region and usage)
  • Whole-House Telephone Access – Works with your existing telephone line to offer control of your home’s temperature and Indoor Air Quality over the phone
  • Model Numbers – YTH9421C1010, YTH9421C1002, TH9421C1004
  • 5-Year Warranty