Occupancy Thermostat





New Thermostats

See our new heating and cooling thermostats.




Energy Bill Becomes Law

The American Recovery and Reinvestment Act of 2009 extended many consumer tax incentives originally introduced in the Energy Policy Act of 2005 (EPACT) and amended in the Emergency Economic Stabilization Act of 2008 (P.L. 110-343). Businesses, utilities, and governments are also eligible for tax credits.



A thermostat controlled by room occupancy to save energy costs

  Flushmount in Room


A thermostat that is controlled by its internal light sensor or external occupancy sensor

New Product


Key Features and Specifications of TLOS52 Thermostat:

  • Occupancy Sensing Features:
    • Inputs on back of thermostat for our external motion sensor (OS24V).
    • An internal adjustable light sensor to detect occupancy through room lighting (works best in rooms with occupancy controlled lighting).
    • An optional Wi-Fi module can be added to monitor and control thermostat from a mobile device (see below).
    • When occupancy is sensed using our external OS24V occupancy sensor (see below), the thermostat goes into an occupied mode (i.e. programmed setpoint) for 10, 20, or 30 minutes.   After the preset time elapses and no occupancy is sensed during that time, the thermostat goes into an unoccupied mode (e.g, setback setpoint or off) until occupancy is sensed again.
    • When occupancy is sensed using the thermostat's internal light sensor, the thermostat goes into an occupied mode for as long as the room's light level stays at the adjustable threshold.  When the room's light level drops below the adjustable light threshold, the thermostat goes into an unoccupied mode.  This option works best when the room's lighting is controlled by occupancy sensing light switches.
  • This thermostat is often used in classrooms and conference rooms to conserve energy, but it can also be used in your home or rental home to conserve energy.
  • Mounts on wall surface.
  • Gas/Electric or Heat Pump – 3 Heat, 2 Cool Stages
  • Set Point Limiting:  Establish minimum and maximum setpoints
  • Switchable: programmable or non-programmable
  • Switchable: auto changeover, or heat, or cool only
  • Large, easy to read display
  • Scrolling display makes setup easy
  • Override button on front of thermostat allows forced occupied mode up to 4 hours
  • Adjustable backlight intensity
  • Auto night time dimmer for lighted display based on your brightness preference during the night time hours you define.
  • Programmable time periods:  7-day, 5+1+1 day, or 1-day. Up to 3 occupied periods per day
  • Backlit, color coded, buttons and legends
  • Choice of English, Spanish or French for scrolling display
  • Bi-color LED indicates a heating or cooling demand
  • Fahrenheit or Celsius display
  • Compatible with condensate overflow warning systems – lockout compressor with message on the display
  • Service alert indicators
  • Non-volatile memory
  • Keypad lock
  • Title 24 Compliant
  • Install yourself if you are familiar with installing a standard HVAC thermostat.   Just remove your old thermostat from the wall and reconnect the existing wires to the receiver.  The wires are color coded and the instruction booklet has easy to understand pictures.  A toll free technical support line is available if you need some assistance with installing or setting up your thermostat.  If you are not comfortable with a do-it-yourself installation, we recommend that you contact a local HVAC contractor to install the thermostat.  Installation time for a HVAC service technician should not exceed one hour under normal circumstances. This thermostat requires a Common Wire for operation.  If you are not sure if a Common Wire is available, please contact us for more information.
  • One-year manufacturer replacement warranty
  • Dimensions: 5H x 4.5W x 1.5D inches

Key Features and Specifications of Wired Occupancy Sensor OS24V OS24V

  • For use with Occupancy Sensing Thermostats (TLOS52 and TOS51FS).
  • The advantage of this occupancy sensor is that it can be powered by the thermostat R and C wires with 24VAC and therefore does not require a separate power supply.
  • Mounts in ceiling or wall with included mounting bracket.  When mounted in wall or ceiling, the sensor protrudes 3/8 of an inch from the surface.
  • Can be mounted directly below or above the thermostat, but best occupancy sensing will occur when it is ceiling mounted.
  • 360 degrees of occupancy detection (approximately 26 foot spread at a distance of 4 feet from sensor, and 44 foot spread 8 feet from sensor).
  • Sensitivity adjustment.
  • More than 1 wired sensor can be used with a one Occupancy Sensing Thermostat.
  • Connects with two wires (four wires if the sensor will be powered by the R and C thermostat wires).
  • Requires 24VAC or 24VDC power (+/- 10%) and can be powered by thermostat wires R and C or separate power supply.
  • Sensor draws 37mA maximum.
  • 3.50 in. diameter by 1.75 in. deep. When mounted in the wall or ceiling using the supplied mounting bracket, sensor extends 3/8 inches from the wall or ceiling surface.

Key Features and Specifications of Wi-Fi Module 







Light and Motion Sensing Thermostat TLOS52 $199
Wi-Fi Module WIFIMOD $49
Ceiling or Wall Mounted Wired Occupancy Sensor (24VAC or 24VDC powered) OS24V $99
Locking Cover for thermostat prevents the access to setting buttons under the front face of the thermostat.  With the locking cover on, users will only be able to adjust setpoints within your predetermined limits, and force the thermostat into occupied mode for up to 4 hours using the front override button. TLOS52LOCK



   Order Product  (We do not offer on-line orders for these products because we want to talk with you to ensure you order the right product for your needs, and that the products are compatible with your heating/cooling system.)