Precision Zone Control
Individual temperature control for every space — personalised comfort throughout your building.
30% More Efficient
Water transfers thermal energy 4x better than refrigerant — dramatically lower operating costs.
PFAS-Free Future
Minimal refrigerant confined to outdoor units — aligns with Karnot's natural refrigerant philosophy.
Complete Product Range
From concealed ceiling cassettes to freestanding towers — find the perfect hydronic solution for any application.
Cassette Fan Coil Units
Ceiling-integrated with 4-way air distribution — the professional's choice for commercial and upscale residential.
- Air Flow: 340–2,380 m³/h
- Capacity: 1.8–12.6 kW cooling
- Installation: Flush ceiling mount
- Applications: Offices, hotels, retail, luxury homes
4-Pipe Cassette Units
Simultaneous heating and cooling — perfect for buildings with diverse thermal loads in different zones.
- Air Flow: 340–2,380 m³/h
- Dual Coils: Independent heating & cooling
- Applications: Mixed-use, hospitals, hotels
- Benefit: No seasonal changeover required
Split Fan Coil Units
Wall-mounted with hydronic efficiency — familiar aesthetics with superior performance over split ACs.
- Air Flow: 510–1,020 m³/h
- Capacity: 2.8–5.6 kW cooling
- Installation: High-wall mount
- Applications: Apartments, condos, small offices
Horizontal Concealed Units
Fully ducted ceiling units — completely invisible with customisable air distribution to multiple zones.
- Air Flow: 340–2,380 m³/h
- Capacity: 2.2–14.0 kW cooling
- Static Pressure: Up to 50 Pa
- Applications: Offices, restaurants, retail
Horizontal Exposed Units
High-wall or exposed ceiling mount — concealed unit benefits with easier installation and maintenance.
- Air Flow: 340–2,380 m³/h
- Capacity: 1.8–12.6 kW cooling
- Installation: Exposed or semi-concealed
- Applications: Industrial, warehouses, workshops
Vertical Exposed Units
Freestanding tower design — ideal for retrofit, warehouses, and industrial. Standard and high-capacity models.
- Air Flow: 340–2,380 m³/h (std) | 880–2,000 m³/h (HC)
- Capacity: Up to 10 kW cooling / 15 kW heating
- Footprint: Compact 270–600 mm wide
- Applications: Retrofit, industrial, agriculture
Ultra Thin Units
Exceptionally slim at only 130 mm wide — perfect for space-constrained applications.
- Air Flow: 80–600 m³/h
- Capacity: 1.0–4.0 kW cool / 1.5–6.0 kW heat
- Depth: Only 130 mm (5.1 inches)
- Applications: Apartments, boutique hotels, tight retrofits
Complete System Integration
iZONE fan coils are designed to work seamlessly with iHEAT heat pumps, creating a complete, efficient, and future-proof hydronic HVAC solution.
Pair with iHEAT Heat Pumps
- R290 natural refrigerant technology
- Optimal performance at 30–50 °C water
- COP ratings up to 4.5 in heating mode
- Seamless BMS integration
- Single-source warranty and support
Hydronic System Benefits
- Centralised heat pump with distributed fan coils
- 95% reduction in building refrigerant
- Easy solar thermal integration
- Compatible with existing boiler/chiller
- Future-ready for renewables
Advanced Control Options
- Wireless remote control standard
- Wired wall controllers available
- RS485 ModBus network capability
- Room and coil temperature sensors
- Weekly programmable timers
- BMS integration ready
Installation & Support
- BOI-SIPP registered manufacturer
- CE certified for international markets
- Comprehensive technical documentation
- Philippines-based engineering support
- Quick delivery across ASEAN
Why Choose Hydronic?
See how iZONE outperforms traditional climate control technologies.
| Feature | iZONE Hydronic | VRF / Split AC | Radiators |
|---|---|---|---|
| Heating & Cooling | Both from one unit | Both (separate units) | Heating only |
| Energy Efficiency | 30% better than split | Good (COP 3-4) | Medium |
| Refrigerant in Building | Minimal (outdoor only) | High (pipes throughout) | None (water) |
| Response Time | Fast (3x radiator) | Fast | Slow |
| Zone Control | Individual room | Individual room | Limited |
| Operating Cost | Lowest | Medium | High |
| Maintenance | Low (sealed system) | Medium (refrigerant) | Low |
| Flexibility | 7 configurations | Good | Limited |
Future: iSAVE Smart Home Integration
Coming Q4 2026: Transform your iZONE system into a fully integrated smart home ecosystem with voice control, automation, and energy optimisation.
Smart Home Compatibility
- Matter protocol certified — universal
- Apple Home, Google Home, Alexa, SmartThings
- Thread mesh networking for reliable wireless
- Voice control for every zone
- Single controller for all fan coils
Energy Intelligence
- Real-time energy monitoring per zone
- AI-powered occupancy-based scheduling
- Solar integration — prioritise solar power
- Off-peak load shifting
- Blockchain-verified carbon credits
Predictive Maintenance
- 24/7 system health monitoring
- Early warning alerts before failures
- Automatic service ticket generation
- Performance trending and tracking
- 60% reduction in unplanned downtime
Revenue Generation
- Virtual Power Plant (VPP) participation
- Demand response payments
- Carbon credit monetisation (8-15% return)
- Energy cost reduction: 15-25%
- Total value: 30-45% beyond baseline
The Complete Karnot Ecosystem
iHEAT heat pumps + iZONE fan coils + iSAVE smart controller = The first PFAS-free hydronic HVAC system with native Matter integration, energy optimisation, and carbon credit generation.
Learn More About iSAVEFrequently Asked Questions
Why choose hydronic fan coils over split AC?
Hydronic fan coils are 30% more efficient than split AC systems, use minimal refrigerant (confined to the outdoor heat pump only), provide both heating and cooling from one unit, and offer precise zone control. Water transfers thermal energy 4x better than refrigerant.
What iZONE configurations are available?
iZONE is available in 7 configurations: ceiling cassette (2-pipe and 4-pipe), wall-mounted split, horizontal concealed (ducted), horizontal exposed, vertical tower/freestanding, and ultra-thin (130mm depth). Capacities range from 1.0 to 15.0 kW.
Does iZONE work with iHEAT heat pumps?
Yes. iZONE is specifically designed to pair with iHEAT R290 heat pumps, creating a complete PFAS-free hydronic HVAC system. The combination delivers COP up to 4.5 with 95% less refrigerant than VRF systems.