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Thermostats for HVAC systems. Programmable, WiFi, bimetal, digital thermostats, and more for controlling HVAC equipment; shop now at Blackhawk Supply.
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![Honeywell TR21-J TEMPERATURE SENSOR ONLY WITH NETWORK JACK. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/Honeywell-logo_fd81c8ae-4517-4e20-bda1-65edff4e86b0_medium.png?v=1709745870)
TR21-J | TEMPERATURE SENSOR ONLY WITH NETWORK JACK. | Honeywell
Brand: Honeywell
SKU: TR21-J
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![Honeywell TR21-H Wall Module with Temperature and Humidity sensor. Network jack included. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/Honeywell-logo_ce71a2c1-29aa-41e1-bf12-7b3409857859_medium.png?v=1709745871)
TR21-H | Wall Module with Temperature and Humidity sensor. Network jack included. | Honeywell
Brand: Honeywell
SKU: TR21-H
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![Honeywell TP973A2223 TRADELINE. BEIGE COVER. COVER IN BEIGE. | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/products/Honeywell-logo_433fd621-263e-4dcd-abed-a65b4212a66b_medium.png?v=1709745865)
TP973A2223 | TRADELINE. BEIGE COVER. COVER IN BEIGE. | Honeywell
Brand: Honeywell
SKU: TP973A2223
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PSH600-UPS | Enclosed UPS Interface board w/ 600VA UPS | Functional Devices
Brand: Functional Devices
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Brand: Belimo
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EFB24-SR | Damper Actuator | 270 in-lb | Spg Rtn | 24V | Modulating | Belimo
Brand: Belimo
SKU: EFB24-SR![Siemens GRD221.1U Damper Actuator | Spring Return | 120 VAC | On/Off | 30 lb-in | Blackhawk Supply](http://blackhawksupply.com/cdn/shop/files/GRD221.1U_be742128-b9aa-462a-94cb-d2f797b66bf9_large.jpg?v=1718995518)
GRD221.1U | Damper Actuator | Spring Return | 120 VAC | On/Off | 30 lb-in | Siemens
Brand: Siemens
SKU: GRD221.1U