Controls up to 2 Stages of heat and 2 stages of colling plus auxiliary and emergency heat

Auto changeover

Large hybrid dot matrix display

Auxiliary and emergency heat indicators

EL (electro luminescent) backlight

IAQ independently programmable fan

7 day programming

Default ENERGY STAR approved program

4 periods per day

Temporary override

Hold

Vacation hold

Optional smart recovery

ENERGY STAR Compliant

Programmable filter timer with change filter indicator

Energy usage monitor

Fahrenheit or Celsius temperature display

12/24 hour clock

Easy programming with LUX Speed Dial

Advanced copy function for fast easy programming

Nonvolatile memory for all programs and settings

Daylight savings button

Multimode keyboard lockout with user programmable 3 Digit Code

Programmable high and low setting limits

Defeatable audible button response

Menu drivensetup done from the front panel

temperature offset (user calibration)

Dual power capable (system/battery)

Multi-stage adjustable temperature differential/cycle rate

Programmable length minimum run time

Programmable auto-changeover dead-band

Programmable fan delays for heat, cool, in both on and off

Patent # 6,988,671