Digital Cooling Thermostat Outlet for Attic Fans, Exhaust Fans & Ventilation Control
YeloDeer Digital Cooling Thermostat Outlet with Timer is a plug-in fan controller designed for cooling and ventilation applications. It automatically powers connected fans when the sensed temperature rises above your set point, helping remove trapped heat and improve airflow.
This product is ideal for attic fans, gable fans, roof fans, exhaust fans, inline duct fans, greenhouse fans, grow room fans, garage fans, workshop ventilation, server rack cooling, and other fan-based cooling applications.
Unlike the heating thermostat version, this cooling thermostat is designed to control fans and ventilation devices when the temperature is too high.
Quick Fit Snapshot
Cooling Control Only Designed to turn fans on when the sensed temperature is too high.
Plug-In Design No wiring required. Plug the controller into a 120V outlet.
15A / 1800W Max Use only with compatible plug-in fans within the rated load.
6.6 ft Sensor Probe External probe lets you measure temperature near the target air zone.
Key Benefits
Automatic Fan Control Powers connected fans when temperature rises above your set point.
No Wiring Required Plug-in outlet design is easier than hardwired fan control systems.
Flexible Probe Placement 6.6 ft external probe helps measure attic, greenhouse, grow room, or equipment room temperature.
0–10 Hour Timer Useful for timed ventilation, temporary airflow, or controlled fan runtime.
Forced Cooling Mode Lets the connected fan run continuously for testing or emergency heat removal.
Digital Control Digital display, sensor calibration, differential adjustment, and °F / °C switching support easier setup.
Best For
Attic & Home Ventilation
Attic Fans Gable Fans Roof Fans Exhaust Fans
Grow & Greenhouse Airflow
Greenhouse Fans Grow Room Fans Inline Duct Fans Ventilation Control
Garage & Workshop Cooling
Garage Fans Workshop Ventilation Hot Storage Rooms Utility Rooms
Technical Cooling
Server Rack Cooling Equipment Rooms Pet Area Ventilation Fan-Based Cooling
Important Before You Order
This product is for fan and ventilation control.
It is designed to power a fan when the sensed temperature is too high and stop the fan after the temperature drops according to your settings.
It is not intended for compressors, air conditioners, refrigerators, freezers, or other compressor-based cooling equipment.
Your device is a plug-in fan or ventilation device Your device voltage is 120V Your fan does not exceed the rated load Your fan can safely cycle on and off Your application needs cooling / fan control, not heating control The controller and plug connection can stay dry The probe can be placed in the target air zone You understand this is not for AC, compressors, or refrigeration equipment
Cooling Thermostat vs Heating Thermostat
Choose This Cooling Thermostat If You want to control an attic fan, gable fan, exhaust fan, inline duct fan, greenhouse fan, grow room fan, garage fan, workshop fan, or server rack fan.
Choose Heating Thermostat If You want to control pipe heat tape, heating cable, heat mat, heater, warming pad, incubator heater, drum heater, or other heating equipment.
The two products may look similar, but their control logic is different. Please choose based on whether you need cooling / fan control or heating control.
For heating control, choose YeloDeer Digital Plug-In Thermostat with Timer.
Recommended Applications
YeloDeer Digital Cooling Thermostat Outlet is designed for fan-based cooling and ventilation control in residential, hobby, grow room, greenhouse, garage, workshop, and technical cooling applications.
Home Ventilation
Attic Fan Automation Gable Fan Control Roof Fan Control Exhaust Fan Control
Greenhouse & Grow Room
Greenhouse Ventilation Grow Room Cooling Inline Duct Fans Circulation Fans
Garage & Workshop
Garage Ventilation Workshop Fan Control Storage Room Heat Removal Utility Room Airflow
Technical Cooling
Server Rack Cooling Equipment Room Airflow Pet Area Ventilation Fan-Based Cooling Systems
Attic & Home Ventilation
Attics can trap heat, especially during summer. This controller can help automatically turn on a connected attic or exhaust fan when attic temperature rises above your set point, helping move hot air out of the space.
Attic Heat Control Runs the fan when attic temperature rises above the set point.
Less Manual Switching Reduces the need to manually turn ventilation fans on and off.
Flexible Probe Location Place the probe in the attic air space where heat accumulates.
Greenhouse & Grow Room Applications
For greenhouses and grow rooms, this cooling thermostat can help manage airflow by controlling ventilation fans based on temperature.
Inline Duct Fans Intake Fans Exhaust Fans Circulation Fans Greenhouse Fans Grow Room Fans
Technical Cooling Applications
This controller can also be used where fan-based cooling is needed.
Server Racks Equipment Rooms Workshops Garages Pet Areas Utility Rooms
Compatibility Checklist
Fan voltage is 120V Fan wattage is within the rated load Current draw is within the rated load Plug type is compatible Fan can safely cycle on and off Fan is not a compressor-based appliance Controller and plug connection can stay dry Probe can be placed in the target air zone
When Not to Use This Product
- Heating device control
- Pipe heat tape
- Heat mats
- Incubator heaters
- Compressors
- Air conditioners
- Refrigerators or freezers
- Dehumidifiers with compressors
- Hardwired fans without a proper plug
- Devices that exceed the rated load
- Outdoor use without weather protection
- Critical safety systems
For heating control, choose YeloDeer Digital Plug-In Thermostat with Timer.
Product Specifications
| Product Type |
Digital plug-in cooling thermostat outlet |
| Application |
Fan and ventilation control |
| Control Logic |
Cooling mode |
| Voltage |
120V AC / 60Hz |
| Max Load |
15A / 1800W resistive |
| Temperature Range |
41°F to 108°F |
| Display Unit |
°F / °C switchable |
| Sensor Probe Length |
6.6 ft |
| Timer |
0–10 hours |
| Sensor Calibration |
Supported |
| Temperature Differential Adjustment |
Supported |
| Forced Cooling Mode |
Supported |
| Compatibility |
Plug-in ventilation fans only |
| Not For |
Compressors, AC units, refrigerators, freezers, or heating equipment |
| Installation Type |
Plug-in, no wiring required |
How Cooling Control Works
This thermostat uses the external sensor probe to measure temperature.
When the sensed temperature rises above your set point, the controller powers the connected fan. When the temperature drops below the stop point based on your settings, it turns the fan off.
Understanding the Timer
The 0–10 hour timer can be useful when you want fan runtime control.
Timed Attic Venting Greenhouse Hot Periods Garage Cooling Workshop Ventilation Equipment Runtime Temporary Airflow
Forced Cooling Mode
Forced cooling mode allows the connected fan to run continuously when needed.
Fan Testing Emergency Heat Removal Temporary Ventilation Hot Summer Afternoons Equipment Cooling
Probe Placement
Good Probe Placement Place the probe where you want to measure the temperature that controls the fan, such as attic air space, plant zone, or equipment hot zone.
Avoid Poor Placement Avoid direct sunlight, hot roof surfaces, fan exhaust paths, rapidly changing airflow, or locations that do not represent the target temperature.
Load Selection Reminder
Before connecting any fan, confirm the fan’s voltage, wattage, and current draw.
Do not exceed the controller’s rated load. Do not use this product with compressors or AC units.
Basic Setup Overview
YeloDeer Digital Cooling Thermostat Outlet is designed for simple plug-in installation.
- Plug the controller into a 120V outlet.
- Plug the fan into the controller outlet.
- Place the 6.6 ft sensor probe in the target temperature area.
- Set the desired fan activation temperature.
- Adjust the temperature differential if needed.
- Set the timer if timed operation is needed.
- Use forced cooling mode if you want continuous fan operation.
- Confirm that the fan turns on and off as expected.
Attic Fan Setup
- Place the probe in the attic area where heat accumulates.
- Avoid direct sunlight on the probe.
- Avoid placing the probe directly in the fan exhaust path.
- Plug the attic or exhaust fan into the controller.
- Set the temperature where you want the fan to start.
- Test operation during warm conditions.
Greenhouse or Grow Room Setup
- Place the probe near the plant canopy or target temperature area.
- Keep the probe away from direct grow lights if they cause false readings.
- Connect the inline, intake, or exhaust fan.
- Set the desired cooling temperature.
- Adjust the differential to avoid frequent fan cycling.
Important Installation Notes
Ventilation Fans Only Use only with compatible plug-in ventilation fans within the rated load.
No Compressors Do not use with compressors, AC units, refrigerators, freezers, or compressor-based dehumidifiers.
Keep Controller Dry Do not place the controller or outlet connection in rain, dripping water, condensation, or standing water.
Check Cord Safety Do not use damaged cords, loose plugs, unsafe outlets, or undersized extension cords.
Place Probe Carefully Place the probe where it reflects the actual temperature you want to control.
Follow Fan Instructions Always follow the fan manufacturer’s instructions and rated load limits.
Using the Probe Correctly
Correct probe placement is critical for reliable fan control.
Place the probe in the target air zone Keep it away from direct sunlight Keep it away from direct fan exhaust if that causes unstable readings Avoid placing it directly against hot surfaces Secure it so it does not move during operation Calibrate the sensor if the reading needs adjustment
Using with Extension Cords
If an extension cord is needed, use a properly rated cord suitable for the fan load and environment.
For attic or garage use, make sure the connection is secure and not exposed to water or damage.
Outdoor / Semi-Outdoor Reminder
If used in an attic, greenhouse, garage, shed, or semi-outdoor environment, keep the controller and plug connection protected from rain, dripping water, condensation, and standing water.
