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  • Stelpro STZW402 KI Z-Wave Plus Electronic Thermostat — Specifications

    September 08, 2026 2 min read

    Specification sheet for the Stelpro STZW402 KI Z-Wave Plus Electronic Thermostat for smart home electric heating, up to 4000 W.

    Full text manual (for reference)

    Specification sheet for the Stelpro STZW402 KI Z-Wave Plus Electronic Thermostat for smart home electric heating — up to 4000 W.

    Overview

    KI Z-Wave thermostats can easily be integrated into your home's Z-Wave network, so you can adjust the temperature setpoint of rooms in your home from a distance.

    Key Selling Points

    • Integrates easily with a smart home hub.
    • Control with a mobile application, depending on the hub.
    • Electricity savings: energy savings of 10-15% depending on use (independent study).

    Compatibility

    • Z-Wave hub required.
    • Z-Wave Plus certified.

    Accuracy

    • Accurate ambient temperature control of ± 1°F.
    • CSA C828-13.
    • Temperature sensing with thermistor.

    Control Features

    • Two functions available: comfort and economy.
    • Two- or four-wire connection.
    • Outdoor temperature display (depending on the central controller and its application).
    • Frost-free warning.
    • Display in Celsius or Fahrenheit.
    • Backlit screen with adjustable intensity.

    Specifications

    Color White
    Finish Molded plastic
    Wattage & Voltage 150 W to 2000 W @ 120 V; 300 W to 4000 W @ 240 V
    Temperature Range 41°F to 86°F
    Dimensions 4 7/8 in. wide x 4 7/8 in. high x 1 3/8 in. deep
    Warranty Three years

    Product Code Reference

    Product Code Watts (Min/Max) Voltage Amperage Frequency
    STZW402WB+ 150/300 – 2000/4000 120/240 V 16.7 A 50/60 Hz

    For home automation system compatibility and instructions on connecting to your KI thermostat, visit www.stelpro.com.

    Manufacturer: Stelpro reserves the right to modify descriptions, manufacturing specifications, or prices without prior notice. No returns accepted on optional-color products. For all the latest models and prices, refer to www.stelpro.com.