We ship to the Philippines — door-to-door, customs and logistics handled by 3G Electric

3G Electric
RFQ CartGet a QuoteSign inSign up
HONEYWELL HOME Wireless Thermostat: Heat and Cool, Auto, C/R, 7 Day, Horizontal - Wireless Thermostats
HONEYWELL HOMEWireless Thermostats

HONEYWELL HOME Wireless Thermostat: Heat and Cool, Auto, C/R, 7 Day, Horizontal

The HONEYWELL HOME Wireless Thermostat (MPN THX9421R5021WW/U) is a touch-screen, rectangle-shaped thermostat for heat and cool applications. It supports 3H/2C Conventional and 4H/2C Heat Pump stages, with automatic…

SKU 3G-OTH-70340

Brand
HONEYWELL HOME
Item
Wireless Thermostat: Heat and Cool, Auto, C/R, 7 Day, Horizontal
Category
Wireless Thermostats
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

HONEYWELL HOME
Manufacturer Part Number
THX9421R5021WW/U
Type
Auto, C/R, Horizontal, Rectangle
Day
7
Shape
Rectangle
Stages
3H/2C Conventional, 4H/2C Heat Pump
Application
Heat and Cool
Control Type
Touch Screen
Changeover Type
Automatic
Mounting Direction
Horizontal
Terminal Designations
R
Humidification Control
Yes
Programming Capability
7 Day
Temperature Control Range
40° to 99°F
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

HONEYWELL HOME Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The HONEYWELL HOME Wireless Thermostat (MPN THX9421R5021WW/U) is a touch-screen, rectangle-shaped thermostat for heat and cool applications. It supports 3H/2C Conventional and 4H/2C Heat Pump stages, with automatic changeover and 7-day programming capability. The thermostat has a temperature control range of 40° to 99°F, terminal designation R, and includes humidification control.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the HONEYWELL HOME Wireless Thermostat THX9421R5021WW/U used for?

This wireless thermostat controls heating and cooling in residential or light commercial HVAC systems. It supports 3H/2C conventional and 4H/2C heat pump stages, with automatic changeover and 7-day programming for energy savings.

What are the specifications of the HONEYWELL HOME THX9421R5021WW/U thermostat?

Key specs include a touch screen, rectangle shape, horizontal mounting, temperature range 40° to 99°F, terminal R, automatic changeover, and humidification control. It supports 3H/2C conventional or 4H/2C heat pump stages with 7-day programming.

Where to buy the HONEYWELL HOME THX9421R5021WW/U thermostat worldwide?

3G Electric supplies this HONEYWELL HOME thermostat worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to install the HONEYWELL HOME wireless thermostat THX9421R5021WW/U?

Installation requires mounting the thermostat horizontally on a wall, connecting the R terminal wire, and configuring the system type (conventional or heat pump) and 7-day schedule. Always follow the manufacturer's manual and turn off power before wiring.

Used in

Common applications for HONEYWELL HOME
Residential HVAC — Honeywell Home TH115-A-120S/U thermostat for 7-day programmable temperature control in homes.
Light commercial buildings — Honeywell Home TL8230A1003 line-voltage thermostat for electric heating systems in offices.
Hydronic heating systems — Honeywell Home L4006E1117 immersion controller for high-limit temperature regulation in boilers.
Indoor air quality monitoring — Honeywell Home C7263A1008 air quality sensor for gas analysis in commercial facilities.
Furnace control — Honeywell Home ST9120U1011 timer controller for circulating fan timing in integrated furnace systems.
HVAC switching — Honeywell Home RA889A1001 switching relay for 24V AC control of zone valves or dampers.

HONEYWELL HOME Products

3G Electric supplies HONEYWELL HOME wireless thermostats. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN THX1000W1/U). Key specifications — Application: Heat and Cool; Stages: 4H/2C Heat Pump; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: R; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN THX1000W1/U). Key specifications — Application: Heat and Cool; Stages: 4H/2C Heat Pump; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: R; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN YTHX1200W5/U). Key specifications — Application: Heat and Cool; Stages: 2H/4C Conventional; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: R; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN YTHX1200W5/U). Key specifications — Application: Heat and Cool; Stages: 2H/4C Conventional; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: R; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN THX1000B2/U). Key specifications — Application: Heat and Cool; Stages: 2H/3C Conventional; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: W2-AUX; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN THX1000B2/U). Key specifications — Application: Heat and Cool; Stages: 2H/3C Conventional; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: W2-AUX; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN THX900B2/U). Key specifications — Application: Heat and Cool; Stages: 2H/2C Conventional; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: R; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN THX900B2/U). Key specifications — Application: Heat and Cool; Stages: 2H/2C Conventional; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: R; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN THX1100W3/U). Key specifications — Application: Heat and Cool; Stages: 2H/4C Conventional; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: C; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN THX1100W3/U). Key specifications — Application: Heat and Cool; Stages: 2H/4C Conventional; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: C; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN THX1200W5/U). Key specifications — Application: Heat and Cool; Stages: 2H/4C Conventional; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: W2-AUX; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME
HONEYWELL HOME Smart Thermostat: Heat and Cool, Auto and Manual, Fully Customizable (In-App Based) (MPN THX1200W5/U). Key specifications — Application: Heat and Cool; Stages: 2H/4C Conventional; Programming Capability: Fully Customizable (In-App Based); Shape: Rectangle; Terminal Designations: W2-AUX; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.

More from HONEYWELL HOME

View all HONEYWELL HOME parts →
HONEYWELL HOME Low Voltage Thermostat: Heat and Cool, Auto, 7 Day, Horizontal, Rectangle, Horizontal (MPN TH8321R1001). Key specifications — Application: Heat and Cool; Stages: 2H/2C Conventional, 3H/2C Heat Pump; Programming Capability: 7 Day; Shape: Rectangle; Terminal Designations: Y2; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic; Brand: HONEYWELL HOME.
HONEYWELL HOME
HONEYWELL HOME Low Voltage Thermostat: Heat and Cool, Auto, 7 Day, Horizontal, Rectangle, Horizontal (MPN TH8321R1001). Key specifications — Application: Heat and Cool; Stages: 2H/2C Conventional, 3H/2C Heat Pump; Programming Capability: 7 Day; Shape: Rectangle; Terminal Designations: Y2; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic; Brand: HONEYWELL HOME.
HONEYWELL HOME Wireless Thermostat Kit: Heat and Cool, Auto, 5-1-1/5-2, Horizontal, Rectangle (MPN YTH6320R1001). Key specifications — Application: Heat and Cool; Stages: 2H/2C Conventional, 3H/2C Heat Pump; Programming Capability: 5-2; Shape: Rectangle; Terminal Designations: Y2; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic; Brand: HONEYWELL HOME.
HONEYWELL HOME
HONEYWELL HOME Wireless Thermostat Kit: Heat and Cool, Auto, 5-1-1/5-2, Horizontal, Rectangle (MPN YTH6320R1001). Key specifications — Application: Heat and Cool; Stages: 2H/2C Conventional, 3H/2C Heat Pump; Programming Capability: 5-2; Shape: Rectangle; Terminal Designations: Y2; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic; Brand: HONEYWELL HOME.
HONEYWELL HOME Wireless Thermostat: Heat and Cool, Auto and Manual, 5-1-1/5-2, Horizontal, Rectangle (MPN TH6320R1004). Key specifications — Application: Heat and Cool; Stages: 2H/2C Conventional, 3H/2C Heat Pump; Programming Capability: 5-1-1; Shape: Rectangle; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME; Mounting Direction: Horizontal.
HONEYWELL HOME
HONEYWELL HOME Wireless Thermostat: Heat and Cool, Auto and Manual, 5-1-1/5-2, Horizontal, Rectangle (MPN TH6320R1004). Key specifications — Application: Heat and Cool; Stages: 2H/2C Conventional, 3H/2C Heat Pump; Programming Capability: 5-1-1; Shape: Rectangle; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME; Mounting Direction: Horizontal.
HONEYWELL HOME Low Voltage Thermostat: Heat and Cool, Auto and Manual, 7 Day, Horizontal, Rectangle (MPN TH8110R1008). Key specifications — Application: Heat and Cool; Stages: 1H/1C Conventional, 1H/1C Heat Pump; Programming Capability: 7 Day; Shape: Rectangle; Terminal Designations: G; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME
HONEYWELL HOME Low Voltage Thermostat: Heat and Cool, Auto and Manual, 7 Day, Horizontal, Rectangle (MPN TH8110R1008). Key specifications — Application: Heat and Cool; Stages: 1H/1C Conventional, 1H/1C Heat Pump; Programming Capability: 7 Day; Shape: Rectangle; Terminal Designations: G; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME Wireless Thermostat Kit: Heat and Cool, Auto and Manual, 7 Day, Horizontal, Rectangle (MPN YTHX9421R5101WW/U). Key specifications — Application: Heat and Cool; Stages: 3H/2C Conventional, 4H/2C Heat Pump; Programming Capability: 7 Day; Shape: Rectangle; Terminal Designations: A; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME
HONEYWELL HOME Wireless Thermostat Kit: Heat and Cool, Auto and Manual, 7 Day, Horizontal, Rectangle (MPN YTHX9421R5101WW/U). Key specifications — Application: Heat and Cool; Stages: 3H/2C Conventional, 4H/2C Heat Pump; Programming Capability: 7 Day; Shape: Rectangle; Terminal Designations: A; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic and Manual; Brand: HONEYWELL HOME.
HONEYWELL HOME Low Voltage Thermostat: Heat and Cool, Auto, 7 Day, Horizontal, Rectangle, Horizontal (MPN TH8320R1003). Key specifications — Application: Heat and Cool; Stages: 2H/2C Conventional, 3H/2C Heat Pump; Programming Capability: 7 Day; Shape: Rectangle; Terminal Designations: A-L/A; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic; Brand: HONEYWELL HOME.
HONEYWELL HOME
HONEYWELL HOME Low Voltage Thermostat: Heat and Cool, Auto, 7 Day, Horizontal, Rectangle, Horizontal (MPN TH8320R1003). Key specifications — Application: Heat and Cool; Stages: 2H/2C Conventional, 3H/2C Heat Pump; Programming Capability: 7 Day; Shape: Rectangle; Terminal Designations: A-L/A; Temperature Control Range: 40° to 99°F; Changeover Type: Automatic; Brand: HONEYWELL HOME.