Honeywell Home Evohome Hot Water Control Kit (8406H)

£ 97.79INC VAT

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Honeywell Home Evohome Hot Water Control Kit (8406H)

For use in conjunction with Honeywell Home Evohome Thermostat Pack (Code 4512H). Hot water control kit consisting of a wireless cylinder thermostat, transceiver, optional unvented cylinder insertion sensor and an additional wireless BDR relay box to control a 2-port zone valve or 3-port diverter valve. Includes sensors for both traditional and unvented cylinders.

  • Wireless Connectivity
  • Accurate Temperature Sensors
  • Fits Vented & Unvented Cylinders
  • Time & Temperature Set
  • Easy to Read LED Indicators
  • Suitable for All Boilers

More Info

View all: Honeywell Home Control Packs

£97.79INC VAT

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Can this be used on it’s own to see the temperature remotely?

Asked by: Dai79

I have 2 separate hot water tanks, can I link 2 of these together to control both tanks via the control unit?

Asked by: SparkWhizBang
Each evohome controller is able to control up to 12 room heating zones and 1 hot water zone. Due to the control hierarchy within evohome, where for example, a room demand operates the room actuator and heating control relay then boiler relay, while hot water demand operates the hot water relay and then boiler relay, and due to different control algorithms used for hot water control, it is not possible to reassign a heating zone to hot water control. An additional hot water cylinder can be controlled independently by using separate timing and thermostat, or an additional evohome can be used (up to 4 can be used with the same boiler relay). Controlling 2 cylinders from one evohome should not be attempted, especially with unvented systems that need to be installed with due regard to Part G of the building regulations.
Answered by: Honeywell Home Consumer Support
Date published: 2019-08-20

Standalone unit ???

Can this wireless tank stat be used on its own without the controller or does it have to be part or a system with a control panel etc ???
Asked by: Goodrias
The ATF500DHW hot water kit can be used without the evohome controller but only manually, by pressing the button on the relay box in order to turn the hot water ON or OFF. It is not a recommended way of using the device since it was designed to be controller remotely through the evohome controller.
Answered by: Honeywell Home Consumer Support
Date published: 2021-07-02
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Brand Honeywell Home
Central Heating Control Type Thermostats
Colour White
Compatible Boiler Type All Boilers
ERP Control Class Class IV
Heating System Mode Hot Water
Manufacturer Guarantee 1 Year Guarantee
Model Name Evohome
Pack Size 1
Parent Colour White
Pieces in Pack/Case 1
Power Type Battery-Powered
Product Depth 68 mm
Product Height 285 mm
Product Type Control Kit
Product Width 228 mm
Receiver Power Source Battery-Powered
Smart Compatibility Smart
Suitable System Suitable for Hot Water Central Heating Systems
Wireless/Wired Wireless
Works with Amazon Alexa Works with Amazon Alexa
Works with Android App Works with Android App
Works with Apple HomeKit Does Not Work with Apple HomeKit
Works with Google Home Works with Google Home
Works with iOS App Works with iOS App

Product contents

Wireless cyclinder thermostat, transceiver with 2 x AA batteries, wireless BDR relay box, traditional cylinder strap-on sensor and unvented cylinder insertion sensor.


Instruction Manual