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Cadet T521w 240-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V

Name: Cadet T521w 240-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V
Brand: Cadet
SKU: 5013834471
Price: 19.48 USD
Availability: InStock
Rating: 4.5 (36 reviews)

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Simple to use, twist dial mechanical single-pole thermostat. Can replace most wall-mounted line voltage thermostats and the color-coded wires make installation simple. A cost-effective and easy way to control room temperature. Made in USA.

For use with line voltage 120/240 or 208 electric baseboard and wall heaters, controls up to 5280 W at 240 V or 2640 W at 120 V
Easily replaces most line voltage wall-mounted thermostats
2-wire thermostat with color-coded wires for easy installation
Simple 2-wire installation (single-pole)
Thermostat temperature range is 40°F - 85°F
22 Amp
UL listed in the US and Canada for safety compliance
White
1-year limited warranty

General
Package Quantity	1	Wiring Type	2-wire
Shape	Rectangle	Heating Only	Yes
Type	Thermostat	Cooling Only	No
Display Type	Analog	Temperature Displayed	Current and setpoint/desired temperature
Series Name	T521w	Switching Mechanism	Mechanical

Dimensions
Depth (Inches)	1.5	Width (Inches)	2.75
Height (Inches)	4.75

Features
Voltage (Volts)	240	High/Low Desired Temperature Limits	Yes
Auto System Change from Heat to Cool	No	Single-Stage Heating and Cooling	No
Backlit Display	No	Multi-Stage Heating and Cooling	No

Compatibility
Compatible with Warm Air Furnace	No	Compatible with Steam or Gravity	No
Compatible with Central Air Conditioning	No	Use with Electric Baseboard 120V-240V	Yes
Compatible with Heat Pump (No Aux./EM)	No	Use with Floor/Wall Furnace 24V or 750mV	No
Compatible with Heat Pump (With Aux./EM)	No	Use with Volt Gas Fireplace 24V or 750mV	No
Compatible with Hot Water	No	Use with Pellet Stove for mV Thermostats	No

Certifications
CA Residents: Prop 65 Warning(s)	Prop 65 WARNING(S) -	Safety Listing	UL safety listing

Warranty
Warranty	1-year limited

Miscellaneous
UNSPSC	41112200

Check out the Best Selling Non-Programmable Thermostats on Lowes.com

Review

4.5 out of 5

36 Reviews

80% Recommend this product

Ratings may include incentivized customer reviews.

36 Customer Reviews

Sort By

Would Recommend

I am all set for another30 years. At least. These thermostats last a very long time.

DougSeptember 25, 2026
Verified Purchaser

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Response from CadetCustomerSupport

Good Day, Thank you for choosing our product and taking the time to leave us a review. We truly appreciate your feedback. Have a Great Day Glen Dimpl... Read More

CadetCustomerSupportSeptember 25, 2026

Simple and gets job done

Would Recommend

This thermostat is as described. Simple, effective and good value for money.

QueenieMarch 10, 2026
Verified PurchaserIncentivized

Was this Review Helpful ?

Response from CadetCustomerSupport

Good Day, Thank you for choosing our product and taking the time to leave us a review. We truly appreciate your feedback. Have a Great Day Glen Dimpl... Read More

CadetCustomerSupportMarch 11, 2026

Great product.

Would Recommend

Great product. Easy to install. Simple design and use.

BrendonMarch 10, 2026
Verified PurchaserIncentivized

Was this Review Helpful ?

Response from CadetCustomerSupport

Good Day Brendon, Thank you for choosing our product and taking the time to leave us a review. We truly appreciate your feedback. Have a Great Day Gl... Read More

CadetCustomerSupportMarch 11, 2026

The one this replaced only lasted 13 months.

Would Recommend

Was a good replacement for the 50 year old ones that came with the house. Radiant Ceilling heaters.

YB13March 3, 2026
Verified PurchaserIncentivized

Was this Review Helpful ?

Response from CadetCustomerSupport

Good Day, Thank you for choosing our product and taking the time to leave us a review. We truly appreciate your feedback. Have a Great Day Glen Dimpl... Read More

CadetCustomerSupportMarch 4, 2026

Home owner DYI

Would Not Recommend

Very easy to use simple directions. Supply great heat

MikeFebruary 20, 2026
Verified PurchaserIncentivized

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You can buy this

Would Recommend

Works well with the baseboard heater we just bought

NoneFebruary 19, 2026
Verified PurchaserIncentivized

Was this Review Helpful ?

100% efficient but electricity is expensive. great

Would Recommend

Easy to install and cranks out the heat. easy to use and good around small children

morephotos321February 17, 2026
Verified PurchaserIncentivized

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		Name	Current Item CadetT521w 240-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V
		Ratings	36
		Temperature Displayed	Current and setpoint/desired temperature
		Compatible with Heat Pump (With Aux./EM)
		Type	Thermostat
CadetT522-W 120-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V	CadetBtf 240-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V	CadetBtf 240-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V	Honeywell HomeRLV3120A 24-Volt Electronic Non-Programmable Thermostat Use with Electric Baseboard 120V-240V	Stelpro240-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V	Honeywell HomeRTH111B 24-Volt Electronic Non-Programmable Thermostat Single-Stage Heating and Cooling	Stelpro240-Volt Mechanical Non-Programmable Thermostat Use with Electric Baseboard 120V-240V	Honeywell HomeX1N 24-Volt Mechanical Non-Programmable Thermostat Single-Stage Heating and Cooling	Honeywell HomeCT30A Heat Only 24-Volt Mechanical Non-Programmable Thermostat
27	67	23	67	4	345	3	187	75
Current and setpoint/desired temperature	Set temperature only	Set temperature only	Current room temperature	Set temperature only	Current room temperature	Set temperature only	Current and setpoint/desired temperature	Current and setpoint/desired temperature

Thermostat	Thermostat	Thermostat	Thermostat	Thermostat	Thermostat	Thermostat	Thermostat	Thermostat