Lumi WiFi water heater switch

The Lumi WiFi water heater switch (LM-SB/W) is a smart switch made for water heaters. It runs standalone over 2.4 GHz WiFi with no central controller needed. Set on/off timers on the switch or a smartphone so the heater only runs when needed, and see electrical readings and energy-use statistics. Double-pole switching, 16A rated current, resistive loads up to 3000W, 110–240VAC. Wiring uses L and N from the supply and LO, NO out to the water heater, so the switch box needs a neutral wire (N). HKD Lighting supplies genuine Lumi smart switches with a 24-month warranty; the price is shown on this page.