In HVAC and industrial heating systems, furnace line voltage thermostats provide direct control of electric heating elements without requiring relays or transformers. Tempro thermostats, engineered by Senasys, deliver long-term durability, reliable temperature regulation, and safe operation across residential, commercial, and agricultural furnace installations.

→ Need a downloadable copy of this application note? Click here.

Furnace Line Voltage ThermostatsWhy Use Line Voltage Thermostats in your Furnace?

Tempro thermostats are built for real-world furnace environments where consistent performance and simple installation are key. Their direct-switching design ensures straightforward wiring and minimal points of failure.

Direct Line Voltage Control

  • Switches 120V or 240V directly without additional hardware

  • Fewer components result in faster setup and reduced maintenance

Safety-Forward Design

  • Double-pole models disconnect both lines in 240V systems

  • Rugged contact construction helps prevent arcing and overheating

Proven in Harsh Installations

  • Operates in areas exposed to dust, vibration, and temperature shifts

  • Ideal for barns, warehouses, workshops, and utility rooms

Efficient Temperature Control

  • Fast-acting contacts prevent furnace over-cycling

  • Stable output improves equipment longevity and reduces wasted energy

Compatible with Various Furnace Types

  • Works with electric furnaces, cabinet heaters, and unit heaters

  • Broad temperature setpoints support comfort and process heating

Easy to Install and Service

  • Simple wiring layout speeds up installation

  • Available in NEMA 1 and NEMA 4X enclosures

Furnace Line Voltage ThermostatsTechnical Specifications

  • Setpoints from -30°F to 120°F with ±2°F to 3.5°F differential

  • Available with 6-foot cord, fixed bulb, or remote bulb sensors

  • Single- and two-stage configurations

  • OEM private labeling available

Selecting the right thermostat improves safety, energy use, and long-term reliability in furnace applications. Tempro line voltage thermostats simplify control by eliminating extra components while maintaining precise temperature regulation. Built for tough environments and backed by proven performance, Tempro thermostats are a solid choice for OEMs, contractors, and facility managers seeking dependable operation and streamlined installation.

→ Explore the full line of Tempro Line Voltage Thermostats.

Talk to a product specialist today!

Thermostats & Guards

Tempro offers line voltage thermostats & guards commonly found in commercial, industrial and agricultural settings.

Custom Options

Variety of custom options available in both thermostats & guards, such as, temperature ranges, materials, size & private branding.

Certified

Tempro products meet NEMA, UL, cUL & NEC 457 Ag-ratings.

High Quality

We take pride in quality control & reliable operation of our components. Every switch is individually tested before it leaves the plant.

Stocked in the U.S.A.

Products are designed & shipped from our facilities in Eau Claire, WI to clients across the globe.