> Products > 1 Heat/1 Cool > LuxPro P521U Universal Programmable Thermostat

LuxPro P521U Universal Programmable Thermostat

LuxPro P521U Universal Programmable Thermostat

About This Thermostat

MFG: LuxPro
MFG#: P521U
Our#: 177498
Programmable: Yes (5+2 day)
Stages: 2H & 1C
System Compatibility: Single Stage, Millivolt, Multi-Stage, Heat Pump
Power Options: Battery, 24 VAC Hardwire
Heat/Cool Changeover: Automatic or Manual
Programmable Fan: No
Temperature Limits: Yes
Keypad Lockout: Yes
Backlight: Yes
Vacation Hold: Yes

LuxPro P521U Universal Programmable Thermostat

A full-function, sleek thermostat at the right price, the LuxPro P521U "Universal" thermostat will control most single stage equipment as well as heat pumps and multistage systems up to 2 heat / 1 cool.


  • Separate Weekday and Weekend Programs (2 or 4 program periods per day)
  • Large Display with Backlight
  • Adjustable Heating and Cooling Setpoint Limits
  • Key Board Lock
  • Programmable Air Filter Monitor
  • Selectable "Smart Recovery"
  • Dual Powered (2 AA Batteries Included)
  • User Selectable Programmable or Non-Programmable Operation
  • Manual Temperature Hold
  • Temporary Temperature Override
  • Adjustable Temperature Differential Cycle Rate
  • Adjustable 2nd Heat Stage Offset Setting
  • User Temperature Calibration
  • 5/2 Minute Selectable Time Delay
  • Battery Free Memory Storage
  • 12/24 Hour LCD Clock Display

For Use On:
Conventional Heat & Air Conditioning and Heat Pumps with up to 2-Stage Heat / 1-Stage Cool
3-Wire Hydronic (Hot Water) Zone Valves
Gas Millivolt Heaters

Not for Use With:
120/240 VAC Line Voltage Systems
Dual Fuel Systems

Terminals: O,B, G, Y, RC, RH, W1, A, W2, C
Temperature Control Range: 45 to 90 Degrees F
Dimensions: 5.375" X 3.375" X 1.125"