PRO1
PRO1 R250S Wired Outdoor or Slab Sensor
Model R250S SKU 107354
Wired temperature sensor for outdoor measurement or radiant-floor slab sensing with compatible PRO1 thermostats.
- Measured variables
- Temperature
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Pro1 iAQ
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PRO1
PRO1 R250W Wireless Outdoor Sensor
Model R250W SKU 107353
Battery-powered outdoor temperature sensor for the T755WHO PROsync wireless system.
- Measured variables
- Temperature
- Power sources
- 2 AA batteries; lithium primary AA recommended for cold climates
PRO1
PRO1 R251S Wired Indoor Remote Sensor
Model R251S SKU 107352
Indoor wired temperature sensor for compatible PRO1 thermostats, with supported multi-sensor averaging.
- Measured variables
- Temperature
PRO1
PRO1 R751WO PROsync Wireless Remote Sensor
Model R751WO SKU 107351
Indoor wireless temperature and occupancy remote for the T755WHO PROsync system, with display and local controls.
- Measured variables
- Temperature and occupancy
- Power sources
- 2 AA alkaline batteries or 18–30 VAC, NEC Class II, 50/60 Hz
PRO1
PRO1 T119 Thermostat Wall Cover Plate
Model T119 SKU 105473
Wall cover plate for concealing marks left by a previous thermostat.
- Accessory type
- Thermostat wall cover plate
PRO1
PRO1 T701 Non-Programmable Single-Stage Thermostat
Model T701 SKU 105414
The T701 provides single-stage heating and cooling control with separate fan and system switches.
- Heating and cooling stages
- 1 heat / 1 cool
- Power sources
- 2 AA alkaline batteries or 18–30 VAC, NEC Class II, 50/60 Hz
PRO1
PRO1 T705 Programmable Single-Stage Thermostat
Model T705 SKU 105415
The T705 combines single-stage heating and cooling control with selectable scheduling.
- Heating and cooling stages
- 1 heat / 1 cool
- Power sources
- 2 AA alkaline batteries or 18–30 VAC, NEC Class II, 50/60 Hz
PRO1
PRO1 T715 Programmable Multistage Thermostat
Model T715 SKU 105422
The T715 is a multistage thermostat for conventional heating and cooling systems with up to two stages of each.
- Heating and cooling stages
- 2 heat / 2 cool conventional
- Power sources
- 2 AA alkaline batteries or 18–30 VAC, NEC Class II, 50/60 Hz
PRO1
PRO1 T721 Non-Programmable Heat Pump Thermostat
Model T721 SKU 105416
The T721 controls a single-stage conventional system or a heat pump with up to two heating stages and one cooling stage.
- Heating and cooling stages
- 1 heat / 1 cool conventional; 2 heat / 1 cool heat pump
- Power sources
- 2 AA alkaline batteries or 18–30 VAC, NEC Class II, 50/60 Hz
PRO1
PRO1 T721i Wi-Fi Heat Pump Thermostat
Model T721i SKU 105417
The T721i adds Wi-Fi and app programming to conventional single-stage and two-heat/one-cool heat-pump control.
- Heating and cooling stages
- 1 heat / 1 cool conventional; 2 heat / 1 cool heat pump
- Power sources
- 18–30 VAC, NEC Class II, 50/60 Hz; common wire required
PRO1
PRO1 T725 Programmable Heat Pump Thermostat
Model T725 SKU 105418
The T725 offers programmable control for a conventional single-stage system or a heat pump with up to two heating stages and one cooling stage.
- Heating and cooling stages
- 1 heat / 1 cool conventional; 2 heat / 1 cool heat pump
- Power sources
- 2 AA alkaline batteries or 18–30 VAC, NEC Class II, 50/60 Hz
PRO1
PRO1 T751 Non-Programmable Universal Thermostat
Model T751 SKU 105419
The T751 is a non-programmable thermostat for conventional multistage systems or heat pumps.
- Heating and cooling stages
- Up to 2 heat / 2 cool conventional; 3 heat / 2 cool heat pump
- Power sources
- 2 AA alkaline batteries or 18–30 VAC, NEC Class II, 50/60 Hz
PRO1
PRO1 T755 Programmable Universal Thermostat
Model T755 SKU 105420
The T755 provides scheduling for conventional systems with up to two heating and two cooling stages, or heat pumps with up to three heating and two cooling stages.
- Heating and cooling stages
- Up to 2 heat / 2 cool conventional; 3 heat / 2 cool heat pump
- Power sources
- 2 AA alkaline batteries or 18–30 VAC, NEC Class II, 50/60 Hz
PRO1
PRO1 T755WHO PROsync Wireless Thermostat System
Model T755WHO SKU 107350
The T755WHO PROsync system separates the main room thermostat from the wired equipment module.
- Heating and cooling stages
- Up to 2 heat / 2 cool conventional; 4 heat / 2 cool heat pump
- Power sources
- Main thermostat: 2 AA alkaline batteries or hardwired 18–30 VAC; equipment module: hardwired power required
Brand information & resources
About Pro1 iAQ
PRO1 offers thermostats and accessories, including connected thermostat models and the PROsync wireless system. Its literature library separates thermostat families, wireless-system resources, and accessory specifications.
Brand at a glance
| Attribute | Details |
|---|---|
| Name | Pro1 iAQ |
| Product areas | Thermostats, wired sensors, and wireless sensing accessories |
| Selection starting point | Complete product model and installed equipment identification |
| Sourcing help | Contact Cold Air Central |
Selection & system guidance
Choosing products and replacements
Explore the PRO1 PROsync wireless system for the T755WHO kit and its indoor and outdoor remotes.
Identify the thermostat and accessory models together. A wired temperature probe and a wireless remote sensor have different installation and configuration requirements. Check the exact thermostat’s supported accessory list and the sensor’s intended indoor, outdoor, or slab application.
For wireless installations, use the system-specific pairing instructions and review the required companion devices. Similar model prefixes do not establish compatibility. The R250S, R250W, and R751WO resources below cover different products and should not be substituted for one another.
Manuals & support
Manuals and official resources
- PRO1 literature library — Thermostat-family brochures and official system resources.
- R250S installation manual (PDF) — Wired outdoor/slab sensor installation.
- R250W installation manual (PDF) — Wireless outdoor sensor installation.
- R751WO installation manual (PDF) — Wireless remote sensor installation and system configuration.
Help choosing a product
Contact our team with your complete model number and equipment details for product sourcing assistance.
Manufacturer resources reviewed September 16, 2026.