LUX Pro P521U programmable thermostat covers universal conventional heat and A/C, heat pumps up to 2-stage heat/1-stage cool with AUX/EMERG heat, 2 and 3-wire hydronic baseboard and radiator, and gas millivolt heaters. Dual power with included 2 AA batteries supports 24 V wiring.
For setup the 5/2-day or non-programmable plan uses Speed Slide, backlit view, and selectable recovery. It does not support 120 V/240 V line voltage without a transformer.
LUX Pro P521U: Features
Universal system fit
Controls conventional, heat pump, hydronic and millivolt heat.
Flexible 5/2-day plans
Chooses 2 or 4 periods per day or non-programmable mode.
Selectable smart recovery
Reaches target temperature on schedule automatically.
User calibration and swing
Adjusts temperature reading and cycle differential.
Lock and hold controls
Blocks unauthorized changes while allowing override and hold.
Filter and delay care
Tracks air filter use and guards the compressor with 5/2-minute delay.
LUX Pro P521U: Specifications
Power: Dual powered, 2 AA alkaline batteries included
Extras: Keypad lock, air filter monitor, smart recovery, wall plate model #WP567 optional
Display: Backlit, Fahrenheit or Celsius, AM/PM or military time
Programming: 5/2-day, 2 or 4 periods per day, override and hold
Not compatible: 120V/240V line voltage systems without transformer
System compatibility: Universal conventional heat and A/C; heat pump 2-stage heat/1-stage cool with AUX/EMERG; 2 and 3-wire hydronic; gas millivolt
Brand: LUX Products
4.3★★★★★★★★★★(3)
5 ★1
4 ★2
3 ★0
2 ★0
1 ★0
Customer Reviews
3
★★★★★★★★★★4.0
h****g
Verified
Got it installed without any hassle, seems solid.
★★★★★★★★★★4.0
c***h
Verified
Good display, easy to read from across the room.
★★★★★★★★★★5.0
h*s
Verified
Exactly what I was hoping for, nice and comfortable in here now.
