Front view of the H3747 smart programmer showcasing the interface and Bluetooth-enabled design.

Photo is representative

Secure H3747 4-Channel Smart Programmer Timeclock

The Secure H3747 is a 4-channel smart programmer built for multi-zone heating and hot water control. Designed to replace the ChannelPlus range using the same 9-pin backplate, it handles combi boilers, system boilers, heat pumps, and existing wired thermostats with minimal rewiring.

Main Features:

  • 4-channel control – Manages up to 4 separate heating zones or combination of heating and hot water systems
  • Retrofit-ready design – Uses standard 9-pin backplate for direct ChannelPlus replacement
  • Smart connectivity – Bluetooth app control included, with optional plug-in Wi-Fi adapter for remote access
  • Boiler Plus compliant – Features optimum start/stop and load compensation for improved energy efficiency
  • Long-lasting power – 12-year battery life warranty on programmable thermostat display (PTD)
  • No hub required – Bluetooth control locally, or add Wi-Fi card for remote heating management
  • Modular and expandable – Compatible with extra sensors for additional zone control
  • 7-year warranty – No-quibble coverage for peace of mind

Benefits:

The H3747 streamlines complex heating system upgrades by working with existing ChannelPlus infrastructure. Click-off/click-on mounting speeds up installation, while dual-platform apps (Android/iOS) offer flexible control for installers and end users. Load compensation automatically adjusts heating output based on outdoor conditions, reducing fuel consumption and improving comfort. The system prevents boiler short-cycling and temperature overshoot, extending equipment life and cutting energy waste. Service interval reminders support proactive maintenance, and Energy Company Obligation eligibility makes it suitable for funded upgrade projects.

Product Information

Stock Code H3747
MPN
GTIN
Stock status: 3 available
Price: £172.73
incl. VAT, 20% priced individually

Product Features

Channels 4
Relay input voltage rating 12V to 30V DC or 230/240V AC (50Hz)
Relay output current rating 3A resistive / 1A reactive (max)
Supply voltage (receiver) 230V/240V AC (50Hz)
Battery type (PTD) Non-replaceable 2x AA lithium-ion, 3.6V, 3600mAh
Battery life (PTD) ≈12 years
Insulation category CAT II
Software class Class A
Dimensions (receiver) 107 x 167 x 36mm
Dimensions (PTD) 100 x 100 x 29mm
Case material Flame-retardant thermoplastic
Mounting 9-pin standard wall plate
Impulse voltage rating CAT II 2500V
Enclosure protection IP30
Operating temperature 0°C to +40°C
Storage temperature -20°C to +70°C
Humidity range 0 to 90% RH
Bluetooth frequency 2.4GHz
RF range ~60m (line of sight)

Similar Products