Building a KNX GRCS (Guest Room Control System) for a hotel is a sequence of well-defined steps. This guide walks through each one so owners and integrators share the same plan, from first requirements to hand-over.
Step 1 - Define room functions
Start from the guest and operator experience, not the hardware:
- Lighting scenes: welcome, read, sleep, away, cleaning.
- HVAC setpoints and card-power behaviour.
- Curtain/blind automation and daylight response.
- Service buttons: DND, MUR, and any request buttons.
Step 2 - Design the bus topology
Map rooms to KNX lines, place line couplers per floor, and route the main line to the equipment room. Decide where the IP router bridges to the hotel network for GRMS. Keep 20% spare device capacity per line.
Step 3 - Select devices
- Room control panels matched to interior grade.
- Switching/dimming actuators sized to the lighting load.
- HVAC actuators for fan-coil or VRV.
- Curtain/blind actuators if motorized.
Step 4 - Commission with ETS
KNX devices are parameterized and linked in ETS, the official KNX configuration tool, by a certified integrator. Configure one representative room, verify every function, then clone the project to the others and assign addresses. Keep the ETS project file - it is your long-term maintenance map.
Step 5 - Integrate GRMS and PMS
Specify the IP router and the room-status data model during design so engineering, front desk and energy reporting share one source of truth. Map check-in/out, DND/MUR and faults to the PMS early.
Step 6 - Test and hand over
Verify every scene in a sample of rooms, confirm GRMS dashboards and PMS sync, then hand over documentation: ETS project, point layout, topology and BOM. HOTEKEY supports integrators with drawings and topology through local partners.
Frequently asked questions
- What are the main steps?
- Define room functions, design the bus topology, select panels and actuators, commission devices in ETS, integrate the IP router with GRMS/PMS, then test scenes and hand over with documentation.
- How long does commissioning take?
- For a standardized room type, commissioning is largely repeatable: configure one room, then clone the project to the others and adjust addresses. A 100-200 room hotel typically commissions in weeks, not months.
- Do I need ETS software?
- Yes. KNX devices are parameterized and linked in ETS, the official KNX configuration tool, by a certified integrator. Keep the project file - it is your long-term maintenance map.
- When should GRMS/PMS integration happen?
- Early. Specify the IP router and the room-status data model during design so engineering, front desk and energy reporting share one source of truth from day one.