The Honeywell Home evohome Wi-Fi Connected Thermostat Pack (ATP921R3100) is a sophisticated smart programmable thermostat system that can be used as a standalone connected thermostat or extended into a full multi-zone heating solution controlling up to 12 individual heating zones. Built around the latest evohome Wi-Fi Connected Controller (ATC928G3000), the system doesn't require a separate mobile access kit for remote smart control.
The pack includes the evohome controller with a backlit colour LCD touchscreen, table stand, power lead, and a pre-bound BDR91 wireless relay box that creates the switched live demand for the heating system - making it compatible with S Plan, Y Plan and combi boiler systems, as well as low-voltage switching arrangements. Heating can be scheduled independently up to six times a day, seven days a week, and controlled remotely via smartphone, tablet or smartwatch using the Total Connect Comfort app.
Up to 12
Heating Zones
Wi-Fi
Built-In Connectivity
6x Daily
Schedule Changes, 7 Days
BDR91
Wireless Relay Included
Colour LCD
Backlit Touchscreen
230V
Compatible Systems
Expandable to a Full Zoning System
Used on its own, the evohome Wi-Fi Connected Controller acts as an intelligent single-zone programmable thermostat. Add wireless radiator controllers (HR92) or additional wireless relay boxes to expand the same system into full room-by-room zoning, without draining down or disturbing existing pipework.
Hot Water Control Requires an Additional Kit
This pack covers heating zone control only. To add domestic hot water control to the system, the separate evohome Hot Water Kit (ATF500DHW) is required alongside this thermostat pack.
OpenTherm Boilers Need a Bridge
For OpenTherm-compatible boilers, an evohome OpenTherm Bridge (R8810) can be added to allow evohome to precisely regulate boiler water temperature, rather than using simple on/off switching.
Wi-Fi Connected, No Extra Hub Needed
The ATC928G3000 controller is Wi-Fi enabled out of the box, so remote control via the Total Connect Comfort app works without needing a separate mobile access kit.
Pre-Bound BDR91 Wireless Relay
The included BDR91 wireless relay box arrives pre-bound to the controller, creating the switched live demand signal compatible with S Plan, Y Plan, combi boiler and low-voltage systems.
Backlit Colour Touchscreen
An easy-to-navigate backlit colour LCD touchscreen gives quick access to scheduling, temperature adjustment and system status at a glance.
Flexible Mounting Options
Supplied on the ATF800 table-top stand, the controller can also be wall-mounted using the optional evohome Wall Mount Kit (ATF600) where a 230V in-wall supply and 40mm back box are available.
Six Schedule Changes, Seven Days a Week
Time and temperature can be independently scheduled up to six times per day, every day of the week, giving precise control over comfort and energy use.
Designed for Larger & Multi-Occupancy Properties
evohome suits larger family homes, luxury apartments, multi-occupancy buildings and light commercial spaces such as surgeries or small offices, with zoning that can be tailored to any property layout.
General
Model / MPN
ATP921R3100
Controller Model
evohome Wi-Fi Connected Controller (ATC928G3000)
Colour
White fascia
Maximum Zones
Up to 12 individual heating zones
Mounting
Supplied table stand (ATF800); optional wall mount kit (ATF600)
Total Connect Comfort (TCC) app - smartphone, tablet or smartwatch
Scheduling
Up to 6 time/temperature changes per day, 7 days a week
Display
Backlit colour LCD touchscreen
System Compatibility
Compatible Systems
S Plan, Y Plan, combi boiler systems, and low-voltage switching systems (230V)
Hot Water Control
Available with separate evohome Hot Water Kit (ATF500DHW)
OpenTherm Support
Available with separate evohome OpenTherm Bridge (R8810)
Expandability
Additional HR92 radiator controllers and BDR91 relay boxes available for full zoning
Power
Controller Backup Batteries
AA 1.2V Ni-MH rechargeable, 2000-2400 mAh (if replacement needed)
How many zones can this system control?
Used on its own, the evohome controller manages a single heating zone. With additional HR92 radiator controllers or wireless relay boxes, the same system can be expanded to control up to 12 individual heating zones.
Does this pack include hot water control?
No, this pack covers heating zone control only. To add domestic hot water control, the separate evohome Hot Water Kit (ATF500DHW) is required.
Do I need a separate mobile access kit for remote control?
No. The included ATC928G3000 controller has built-in Wi-Fi, so it connects directly to the Total Connect Comfort app without needing the older RFG100 mobile access kit.
What heating systems is this compatible with?
The pre-bound BDR91 wireless relay makes it compatible with S Plan, Y Plan, combi boiler systems, and low-voltage switching systems running on a 230V supply.
Can this be wall-mounted instead of using the table stand?
Yes, an optional evohome Wall Mount Kit (ATF600) is available, though this requires an existing 230V in-wall power supply and a 40mm deep back box to house the AC-DC transformer.
What if I have an OpenTherm boiler?
For OpenTherm-compatible boilers, adding the evohome OpenTherm Bridge (R8810) allows evohome to precisely regulate the boiler's water temperature rather than using simple on/off control.
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
Documentation
Do you have a question about this product?
One of our expert advisors will be happy to help you!
