Honeywell Home THX1000B2/U ElitePRO S1000 Smart WiFi Thermostat, Black | 4.3 in touchscreen; RedLINK 3.0; onboard occupancy sensor; works with Alexa, Google, Apple Home; Matter; ENERGY STAR

Price: $188.15
(as of Jul 18, 2026 17:46:25 UTC – Details)


The Honeywell Home ElitePRO S1000 is a professional-grade smart thermostat for whole-home comfort, sold here in black under part number THX1000B2/U. It installs on the wall in place of an existing thermostat and runs heating, cooling, fan, and indoor air quality from one 4.3-inch touchscreen you can recolor to suit the room. It fits most residential and light commercial systems: up to 4 stages of heat and 2 of cool on a heat pump, plus multi-stage conventional heating and cooling. That covers gas, oil, and electric warm air, hydronic, dual fuel, fan coil, PTAC, and radiant floor systems. The thermostat is hardwired on 24 VAC and needs a C-wire for steady power. Built-in occupancy and ambient-light sensors ease the setpoint back when the space is empty and adjust the display to the room. Configurable outputs drive a humidifier, dehumidifier, or ventilator, and the thermostat reads indoor humidity. RedLINK 3.0 links it to remote room sensors, an outdoor sensor, or an equipment interface module, and you manage it from the First Alert app over dual-band Wi-Fi, Bluetooth, and Matter, with Amazon Alexa, Google Home, and Apple Home. The S1000 is ENERGY STAR certified and may qualify for utility rebates. In the box you get the thermostat, the UWP wall plate, and a black cover plate with J-box adapter (THP2400BL) for mounting to a 2×4 junction box. With no common wire at the thermostat, add the THP9045A2098/U C-wire adapter (sold separately). The same model comes in white as THX1000W1/U. Honeywell part number THX1000B2; orderable THX1000B2/U. Dimensions: 5.25 in W x 3.54 in H x 0.96 in D (133 x 90 x 24 mm). Backed by Honeywell Home’s 5-year warranty.
The ElitePRO S1000 (THX1000B2/U) is Honeywell Home’s pro-install smart thermostat for homes and light commercial spaces, in black with a dark silver bottom accent. It runs up to 4 heat / 2 cool on a heat pump, or multi-stage conventional heating and cooling.
A 4.3-inch color touchscreen you can restyle to match the room, set in a slim housing about 5-1/4 in wide and under an inch deep, so it sits flat on the wall. It’s hardwired on 24 VAC.
Built-in occupancy and ambient-light sensors ease the setpoint back when the space is empty. Configurable outputs control a humidifier, dehumidifier, or ventilator, and the thermostat reads indoor humidity.
RedLINK 3.0 pairs it wirelessly with remote room sensors, an outdoor sensor, or an equipment interface module (sold separately). It connects over dual-band Wi-Fi, Bluetooth, and Matter, and works with Amazon Alexa, Google Home, and Apple Home through the First Alert app. A C-wire is required; if you don’t have one, add the THP9045A2098/U adapter.
ENERGY STAR certified and rebate-eligible, powered by 24 VAC. Mounts on the wall or a 2×4 junction box with the included UWP wall plate and black cover plate with J-box adapter (THP2400BL). Backed by a 5-year warranty.

Product summary

shift
+
opt
+
D