Your whole room. Made smart. Without rewiring.
SmartARC delivers full guest-room control — HVAC, lighting and curtains — using the wiring already in your rooms, avoiding floor closures, contractor escalation, and renovation disruption.
See How It Fits Your HotelDesigned for hotel renovations, conversions, and retrofit projects.
- Designed for existing hotels
- Part of SensorFlow’s complete guide to hotel energy management systems
Trusted by leading hotel groups worldwide
Most room management systems were designed for new builds.
Traditional whole-room control platforms assume walls are open, ceilings are accessible, and hotels are empty. Retrofit projects rarely work that way.
Modern guest room standards are rising.
Renovation complexity doesn't have to.
$2,000+
Budget escalation
Traditional retrofit projects often expand into rewiring, contractor coordination, and infrastructure replacement — pushing renovation budgets far beyond the original system cost.
Weeks
Programme delays
Large-scale rewiring often forces rooms or floors offline for days — slowing renovation schedules and impacting handover timelines.
Required
Brand-mandated room control
Energy regulation is tightening worldwide — the EU's EPBD, US building-performance standards, Singapore Green Mark, Vietnam's Decree 30/2026 — and the major brands are writing room control into their standards. Independent or flagged, every hotel is being pulled into compliance.
Most whole-room retrofits become expensive when the infrastructure scope expands.
SmartARC was designed to deliver modern room control using existing hotel infrastructure.
Designed around your existing infrastructure.
SmartARC integrates with existing room systems to reduce renovation scope and deployment complexity.
Existing HVAC Systems
Works with existing FCU, split, and VRV/VRF wiring to deliver room-level temperature control.
Existing Lighting Circuits
Supports existing lighting circuits and switches — no fixture replacement required.
Motorised Curtain Systems
Connects to existing curtain motor wiring for automated scene control.
Occupancy & Door Sensors
Occupancy and door-state logic drives automated room behaviour.
Existing Power Infrastructure
Socket-level control and monitoring. Cut standby power in unoccupied rooms and track consumption across the entire property.
Existing Switch Layouts
Compatible with existing wall switch layouts — no guest-facing changes.
No wall hacking. No floor closures. No major rewiring.
See how SmartARC fits into the room.
SmartARC connects to the HVAC, lighting, and curtain wiring already in your rooms — without redesigning the room itself.
- Existing FCU wiring
- Existing lighting circuits
- Existing curtain motors
- Existing wall switches
- Occupancy detection
HVAC Control
FCU, split, VRV/VRF, and chiller compatible
Lighting Module
Current switches | Built-in fallback — lights always work
Curtain Module
Wired to curtain motor | Wireless to RIU
Occupancy Sensor
PIR motion | 5-year battery or wired
Door Sensor
Entrance and balcony doors or windows. 5-year battery or wired
Energy & Power
Socket-level monitoring and control at the RIU
One box. Total room control.
Room Devices
RIU, thermostat, lock, sensors, lighting & curtain controllers
SF Gateway
Room controller — links every device, backhauls to the cloud
Cloud Platform
Central management
PMS
Property system
SmartARC delivers full room-control capability at a fraction of legacy costs — so compliance doesn't break the budget.
Control how every room responds.
Create operational rules and occupancy-based automation from a single operational platform.
- Room Groups
- Automation
- PMS Integration
Built for hotel operations teams — not just engineers.
- Occupied Mode
- Energy-Saving Mode
- Check-out Mode
Control entire floors and room types in seconds.
Group rooms by floor, wing, or room type. Push operational changes across entire floors in a single action.
- Bulk control
- Floor management
- Real-time status
Automate room behaviour based on real-time occupancy and events.
Automate room behaviour using occupancy, door events, and operational schedules.
Automation that guests rarely notice — but operations teams immediately feel.
- Occupancy rules
- Event triggers
- Scheduling
Sync room state with your PMS in real time — no middleware required.
Sync room state with your PMS to automate check-in, checkout, and energy-saving workflows.
- Opera / PMS link
- Real-time sync
- No middleware
Install between check-out and check-in. Seriously.
Designed for renovation teams working against operational timelines.
Deploy room-by-room without triggering infrastructure-scale renovation work.
Mount the RIU
One compact unit behind the ceiling panel.
Connect to wiring
Tap into existing HVAC, lighting, and curtain cables.
Commission remotely
Configure scenes and rules from the cloud.
Traditional Retrofit
SmartARC
What changes in the room — and what doesn't.
SmartARC upgrades room-level control while preserving the infrastructure hotels already rely on.
What stays the same
Existing wall switches
Existing room wiring
Existing ceilings and walls
Existing room layouts
Existing operational workflows
What gets upgraded
Room-level HVAC control
Automated lighting scenes
Occupancy-based automation
PMS-connected room logic
Energy-saving workflows
Centralised operational visibility
Built for hotels like yours.
Brand conversions & PIPs
Hotels upgrading to meet brand standards without full infrastructure replacement.
Renovation programmes
Properties modernising guest rooms while maintaining renovation timelines.
Phased developments
Projects needing modern room control without unnecessary infrastructure complexity.
Compliance & ESG requirements
Hotels balancing compliance requirements with renovation budgets and operational realities.
Purpose-built from years of retrofit experience in occupied hotels.
Designed specifically for phased renovations, operational properties, and room-by-room modernisation.
Meet modern room-control standards without infrastructure-scale renovation costs.
Traditional retrofit projects often become expensive because infrastructure work expands around them. SmartARC was designed to avoid that escalation. Pricing is modular and scales with what you choose to control: hardware starts from $311 per room for key-card replacement alone, up to $839 per room for full HVAC, lighting and curtain control - each on a 2-3 year payback from HVAC savings alone. Operators typically budget around $830 per room for room-control upgrades, and a wired GRMS retrofit runs $1,500-2,000 per room with rooms taken out of service. SmartARC meets the brand requirement at $311 - and even fully loaded with lighting scenes and curtains, it comes in under half the cost of a rewire.
SmartARC Essentials
per room, key-card replacement only
SmartARC Full Control
per room, HVAC + lighting + curtains
Ten years. 20,000+ rooms. No rewiring.
Hilton, Hyatt, Accor, Shangri-La and The Ascott run SensorFlow's platform today. SmartARC extends that same proven technology into the retrofit market — its own deployment record is still building as properties come online.
Proven across existing hotels — with real results.
Modernise with the lights on.
See how SmartARC delivers modern guest room control without major infrastructure disruption.
Designed for hotel renovation and retrofit projects.
Common Questions
Practical answers for hotel teams planning renovation, retrofit, or conversion projects.
SmartARC was designed specifically for existing hotels and retrofit projects. In most deployments, the system uses existing guest room wiring for HVAC, lighting, curtain, and power control — avoiding major cable runs, wall demolition, and large-scale switch replacement.
Yes. SmartARC was purpose-built for occupied hotels. Installation is completed room-by-room, typically between check-out and check-in, without taking entire floors offline or disrupting neighbouring guests.
SmartARC provides unified guest room control for HVAC, lighting, curtains, occupancy detection, door sensors and power management — all managed through a single room controller and central operational platform. If your project only needs HVAC-focused savings, SmartREM is SensorFlow’s dedicated HVAC-only energy saving solution.
Yes. SmartARC integrates with major PMS platforms to automate room behaviour based on check-in, check-out, occupancy status and room-state events.
Yes. SmartARC was designed specifically for retrofit and conversion projects in existing hotels, including properties with older infrastructure where traditional whole-room retrofit solutions often become too disruptive or expensive.
SmartARC supports room-level control requirements increasingly specified in renovation and conversion programmes by major hospitality brands.
Traditional retrofit projects often assume full rewiring, major infrastructure work, and extended room downtime. SmartARC was designed around existing hotel infrastructure — making retrofit projects faster, simpler and more operationally practical.
Beyond energy savings, SmartARC gives hotel teams room-level automation, occupancy-based workflows, scene control, room grouping, automated HVAC setbacks, and centralised operational visibility across the property.
SmartARC typically reduces guest-room HVAC energy by 20–30%, plus further savings on lighting and standby loads. Killing the roughly four hours a day of unnecessary lighting and cooling in keycard-jammed rooms alone carries its own payback.
At Tier A ($311/room), payback is typically 2–3 years from HVAC savings alone, with an IRR above 15% — the exact figure depends on your local energy tariff. Fully loaded configurations follow the same window, evidenced from metered data.
Savings are measured, not modelled. SmartARC reports room-by-room metered kWh using an IPMVP-aligned day-on/day-off baseline, so you’re comparing actual before-and-after consumption rather than a projection from installed equipment. Third-party verification is available on request.
SmartARC has three tiers: $311/room for the brand-standard requirement (key-card replacement, occupancy-based HVAC, automatic lights-off), a configurable mid-tier adding per-loop lighting control and welcome scenes, and $839/room for full HVAC, lighting and curtain control. All three sit under the roughly $830/room operators typically budget for room-control upgrades, and well under the $1,500–2,000/room a wired GRMS rewire costs.
Technical & Integration Questions
For engineering teams, consultants and technical project stakeholders.
Yes. SmartARC was designed to work around existing room infrastructure wherever possible, including existing HVAC, lighting, curtain, switch, and power wiring in retrofit hotel projects.
In many retrofit deployments, SmartARC can work with existing switch infrastructure, helping reduce installation complexity and disruption compared to traditional whole-room retrofits.
SmartARC supports a wide range of hotel HVAC control configurations commonly found in existing guest rooms, including fan coil unit (FCU), split, VRV/VRF and chiller systems used across hospitality retrofit projects.
Yes. SmartARC integrates with hotel PMS platforms to automate room control logic based on check-in/check-out, occupancy, room status and operational workflows.
SmartARC was designed for interoperability within hotel environments and can support integrations with selected third-party operational systems depending on project requirements.
Yes. SmartARC was specifically engineered for occupied hotel retrofit projects where minimising guest disruption and operational downtime is critical.
Installation timelines vary by room configuration and project scope, but SmartARC was designed for fast room-by-room deployment in operational hotel environments.
Yes. Hotels can group rooms by floor, wing, room type or operational zone. The platform also supports scene control and automated room behaviours across multiple room groups.
Yes. SmartARC uses occupancy and room-state logic to automate HVAC, lighting and energy-saving workflows based on real guest room usage.
Traditional whole-room control systems are often designed around new-build assumptions and extensive rewiring. SmartARC was purpose-built for retrofit hotel projects using existing room infrastructure — helping reduce rewiring scope, contractor coordination, room downtime and renovation disruption while still delivering modern room management capability.