CT50 CT80
Price $149.95 MSRP $199.95 MSRP
Sensors Temperature Temperature & Humidity
Battery backup 3 AA's Built-in
Forced Air 2 Heat + 2 Cool 3 Heat + 2 Cool
Heat Pump 1 stage + 1 aux 2 stage + 3 aux
Radiant 2 wire and 3 wire 2 wire and 3 wire
Millivolt Yes Yes
Humidifier Yes
Dehumidifier Yes
Fresh Air Baffle Yes
Fan Purge Yes
Fan Circulate Yes
Filter Reminder Yes Yes
UV and Humidity Pad Reminder Yes