The TS250H is a commercial grade temperature thermostat with a built in humidity sensor and integrated CO2 sensor. The TS250H is designed for familiarity, simplicity, and intuitiveness. With Online temperature, humidity, and air quality management, configuration, and scheduling you take control of your building's comfort and efficiency. Begin reducing energy use, managing air quality, and increasing comfort throughout your facility today!

Internet Programmable Thermostat with

Humidity and CO2 (TS250H)

Temperature, Humidity, and Carbon Dioxide





The everything thermostat.

Many commercial environments require more than just temperature control from their HVAC equipment. Pelican's TS250H delivers a single thermostat with fully integrated web-enabled temperature, humidity, and CO2 monitoring and control. From a single computer screen, you can now see exactly how your building environments are running. You can guarantee your customers or employees are breathing clean, fresh, well-regulated air.

Limited Wire Friendly

Pelican delivered an industry changing solution when it introduced a simple way to deal with limited thermostat wire. With only three wires, the Pelican TS250H can control up to 2H/2C Conventional or 3H/2C Heat Pump HVAC units, humidifiers, dehumidifiers, and provide demand ventilation. Never pay for unnecessary wiring for the control you need. Pelican saves time and money with retrofit friendly designs. 




Automated Wireless Connection

Because we integrate our advanced wireless mesh network into every thermostat, there is ZERO wireless setup required. No passwords to enter or complex connection processes to go through. Thermostats automatically connect to each other and back to the Pelican Gateway (GW400). Easy plug and play technology with no WiFi interference or requirement.


 The Wiring Module (WM700) 

The WM700 comes with every Pelican TS250H purchase. For installation where there is limited wiring between the HVAC unit and thermostat: simply remove the WM700, install it inside the HVAC unit, and use the (3) standard unshielded wire to connect to the TS250H.



Online Management


The TS250H automatically connects wirelessly to a Pelican Wireless Gateway (GW400) installed at the customer's site. With Internet connection, manage all configuration, scheduling, and system operation right from your smartphone, tablet, or PC. Complete control at your fingertips no matter where you are.

Alarm Notifications


Every TS250H monitors its own space temperature and humidity levels in real-time. Through advanced diagnostic and reporting capabilities, the TS250H lets you know when your HVAC system fails. Now you can quickly determine the issue and resolve the problem.

Humidity Control


With real-time humidity monitoring, the TS250H provides true space humidity level management. The TS250H can energize both the dehumidifier and humidifier. Or, it can dehumidify by running the A/C. Humidity levels are displayed as graphs virtually on the Pelican Web App.


Easy Installation


The TS250H installs the same way as any stand-alone programmable thermostat. It connects to the HVAC unit using standard thermostat wire. But, Pelican went one step further. The TS250H only requires (3) wires to connect it to the HVAC unit for up to 2H/2C Conventional, 3H/2C Heat Pump, and/or humidification and dehumidification management. Meaning you never have to pull wire to install the Pelican thermostat.


Energy Efficiency


With Internet connection, you have accurate information about how every thermostat is operating in your building. You can create schedules for managing each space or create Group Schedules to share between multiple thermostats. With real control right at your fingertips, saving money and increasing comfort is now simple and efficient!


Historical Trend Data


Every TS250H tracks trend data in real-time so you can visually see exactly how your spaces are operating at any moment of the day. This data is accessible Online for up to 2 years for every thermostat. The TS250H also tracks Usage Data, so you can lean how much energy is allocated to just the HVAC vs. other building electrical loads.


Air Quality Control


With real-time CO2 monitoring, the TS250H provides true space air quality management. The TS250H can energize the Fan for demand ventilation and building safety. C02 levels are displayed as graphs virtually on the Pelican Web App.


Hardwire: 24VAC, 60Hz; 50mA

Voltage Rating: 23 - 30VAC

Relay Current: 1.0A running





Conventional Unit 

R: 24VAC

C: Neutral

Rc: 2nd 24VAC Transformer

Y: 1st Stage Cool

W: 1st Stage Heat

Y2: 2nd Stage Cool

W2: 2nd Stage Heat

G: Fan

Hu: Humidification

Dh: Dehumidification

Heat Pump Unit 

R: 24VAC

C: Neutral

Rc: 2nd 24VAC Transformer

Y: 1st Stage Compressor

W: (O/B) Reversing Valve

Y2: 2nd Stage Compressor

W2: AUX Heat

G: Fan

Hu: Humidification

Dh: Dehumidification

Single Duct Damper Actuator

R: 24VAC

C: Neutral

Rc: 2nd 24VAC Transformer

Y: 24VAC Damper Open

W: 24VAC Reheat

Y2 - 24VAC Damper Close

Duel Duct Damper Actuator

R: 24VAC

C: Neutral

Rc: 2nd 24VAC Transformer

Y: 24VAC Cool Damper Open

W: 24VAC Heat Damper Open

Y2: 24VAC Cool Damper Close

W2: 24VAC Heat Damper Close


Height: 3.5 inch (89 mm)

Width: 5.97 inch (150 mm)

Depth: 1.5 inch (38 mm)


Thermostat Range

Operating Range: -4 deg. F to 122 deg. F

Differential Temperature: +/- 0.5 deg. F

Operating Humidity (% RH): 5 to 90%; non-condensing

Humidify Setting Range: 10 - 80% RH

Dehumidify Setting Range: 20 - 90% DH

Integarted Room CO2 Sensor: 0 - 2000 PPM; +/- 50ppm accuracy, auto-calibration

Storage Temperature: -20 deg. F to 160 deg. F


System Protection

Thermostat Front Plate Tamper Proof Security Screw

Four Minute Compressor Short Cycle Protection

Temporary Schedule Override

Thermostat Keypad Lockout

Trend Data Analytic and Fault Monitoring

Auxiliary/Emergency Heat Efficiency Algorithm

Humidity Dead Band Protection

High Limit CO2 (Air Quality Control)



Installation Instructions 



Product Specification


TS250H Datasheet

Application/Engineering Guides


Alternative text - include a link to the PDF!


What's in the box? 


Find out what's in the box when you purchase a TS250H Internet Programmable Thermostat with CO2 and Humidity Sensing.

How to remove and install Pelican's three-wire module


Watch to learn how to remove the WM500 Wiring Module from a Pelican thermostat and install it into a PEARL Economizer Controller.



Temperature and Alarm Sensor 


PEARL Economizer

Wireless Proximity Sensor



Temperature Only


Temperature and CO2

Temperature and Humidity