Honeywell 24 Hour 2 Channel Service Programmer ST9400S1001

The Honeywell 24 Hour 2 Channel Service Programmer ST9400S1001 offers dual channel control for independent scheduling of heating and hot water systems. This electronic programmer is typically used in domestic or light commercial projects where separate timing of central heating and hot water is required.

It is commonly installed by heating engineers as part of system upgrades or new boiler installations, providing flexibility for on-site programming and routine maintenance. The unit is surface-mounted and suited for wall positioning near the main heating controls for straightforward access.