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SUPCO SHL523 plenum thermostat, rectangular metal housing with temperature probe and terminal connections

SUPCO

SUPCO SHL523 Plenum Thermostat HVAC Control

SKU CH-5VCH-1G53E

Plenum thermostat with SPST switching across a 110 to 1130 °F range and 7-inch element insertion

  • Wide 110-1130 °F range covers diverse HVAC needs
  • 7 in insertion depth reaches deep plenum spaces
  • SPST switching with 20 °F differential ensures reliable cycling
  • Compact 1-7/8 × 2-51/64 in footprint fits tight plenums

SHL523 Plenum Thermostat for HVAC Systems

The SUPCO SHL523 is a single-pole single-throw plenum thermostat designed for HVAC control applications. It operates across a temperature range of 110 to 1130 degrees Fahrenheit with a 7-inch element insertion length. The unit measures 1-7/8 inches wide and 2-51/64 inches deep. Multiple differential settings of 1.5, 3, 10, 15 and 20 are available.

Check Plenum Dimensions and Wiring Compatibility

Verify that your plenum can accommodate the 7-inch insertion length and the stated width and depth before ordering. Confirm the control circuit requires a single-pole single-throw switch and that the available differential settings match your system requirements. Ensure the temperature range suits the specific heating or cooling application.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 90% of the 1,762 comparable items (median $45.99).

Specifications

Product
Brand nameSUPCO

Questions about this item

Does the SUPCO SHL523 plenum thermostat include mounting hardware or wiring connectors in the box?

The supplier data lists only the thermostat itself with its SPST switching and 7-inch insertion element. No mounting brackets, wire connectors, or additional accessories are mentioned, so plan to supply those separately.

Which temperature range and differential settings suit a typical residential furnace plenum?

The SHL523 operates from 110 °F to 1130 °F with selectable differentials of 1.5 °F, 3 °F, 10 °F, 15 °F, and 20 °F. Residential plenums usually run well within the lower end of this range, so a 10 °F or 15 °F differential is a common starting point.

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