25kW Commercial Monobloc Air Source Heat Pump
Natural Refrigerant R290 · A+++ Rated · 3-Phase
The iHEAT 25kW is engineered for light commercial buildings, larger HMOs, small offices, and multi-unit developments requiring high-capacity heating, hot water, and cooling from a single monobloc unit. Twin HIGHLY DC inverter rotary compressors deliver COP up to 5.00 with exceptional part-load efficiency and built-in redundancy.
Integrated iSAVE™ AI Platform
Blockchain-Verified Carbon Monitoring & Grid Optimisation
Carbon Credit Monetisation
Blockchain-verified emissions data enables automatic generation and sale of carbon credits, creating recurring revenue streams from commercial heat pump operations.
Virtual Power Plant Ready
Participate in demand response programmes and utility partnerships, earning incentives by shifting commercial thermal loads during peak pricing periods.
Real-Time Performance Optimisation
Cloud-based fluid dynamics models continuously tune system parameters, maximising COP and reducing operational costs by 15–25%.
Predictive Maintenance Analytics
Machine learning algorithms detect anomalies and predict component failures weeks in advance, reducing downtime and maintenance costs by up to 40%.
Solar PV Self-Consumption
Intelligent thermal storage optimisation maximises use of on-site solar generation, reducing grid dependency and accelerating ROI on commercial renewable installations.
Tamper-Proof Data Integrity
Integrated UPS and cryptographic verification ensure continuous, auditable emissions tracking for regulatory compliance, ESG reporting, and credit certification.
Commercial Revenue Enhancement: iSAVE transforms commercial heat pumps into revenue-generating assets through carbon credit sales, demand response payments, and reduced energy procurement. Typical commercial installations see 8–15% additional annual returns beyond energy savings alone — improving project ROI and reducing simple payback periods.
Key Features at a Glance
Wide Operating Range
Reliable performance from -25°C to 45°C ambient — suitable for UK year-round commercial operation with no auxiliary heating required.
75°C Hot Water
High-temperature output meets commercial sanitation and Legionella control requirements without auxiliary electric heating.
CHICO Touchscreen
Intuitive 4.3" CHICO touchscreen controller for on-site management, with remote monitoring capability for facilities teams.
Twin Inverter Compressors
Dual HIGHLY DC inverter rotary compressors deliver exceptional part-load efficiency, built-in redundancy, and precise temperature control.
Commercial Sound Level
63 dBA at 1m — designed for plant rooms and commercial plant areas with appropriate acoustic separation from occupied spaces.
Future-Proof R290
R290 (GWP 3) is PFAS-free and compliant with EU F-gas GWP 150 limits from 2027 — no future refrigerant retrofit required.
Ideal Applications: Commercial Hydronic Systems
The iHEAT 25kW is optimised for commercial hydronic distribution — delivering superior efficiency, comfort, and flexibility compared to traditional HVAC approaches.
Maximum Energy Efficiency
Water is 3,500× more efficient than air for thermal transfer — enabling localised zoning, reduced fan energy, and lower carbon footprint at commercial scale.
Superior Comfort & Air Quality
Silent radiant comfort with stable temperatures and no drafts — a healthier working and living environment compared to forced-air HVAC.
Architectural Flexibility
Compact water pipes replace bulky ductwork, saving ceiling plenum space and allowing greater design freedom in commercial refurbishments.
Commercial & Light Industrial Applications
The 25kW iHEAT is designed for properties requiring commercial-grade heat pump performance — scalable, reliable, and low-maintenance.
HMOs & Multi-Unit
25kW output covers 8–12 dwellings when paired with buffer vessels, reducing per-unit heating costs and simplifying plant room design.
Small Commercial Buildings
Offices, retail units, and schools up to ~1,000m² can be served with a single unit, replacing gas boilers with zero-combustion heating.
Full Cooling Capability
20.1kW cooling output via iZONE fan coils provides summer comfort — a complete all-season climate solution from one monobloc unit.
Commercial Hot Water
75°C output meets BS EN 806 and L8 Legionella control requirements — suitable for commercial kitchens, changing rooms, and guest accommodation.
Cascade & Modular
Multiple 25kW units can be cascaded for larger loads up to 100kW+, with lead-lag sequencing for efficiency and redundancy.
Sustainability & ESG
R290 refrigerant + iSAVE blockchain monitoring provides auditable carbon data for ESG reporting, BREEAM assessments, and EPC improvements.
Commercial ROI: Replacing gas boilers with the iHEAT 25kW typically reduces heating energy costs by 50–70% at current gas/electricity prices. With iSAVE carbon credits and demand response income, commercial payback periods can reduce from 5–7 years to 3–4 years — making the business case compelling without reliance on grants.
Funding & Incentives for Eligible Commercial Installations
The iHEAT range is MCS-certifiable for eligible non-domestic applications — consult Karnot for specific project qualification.
Blockchain-verified carbon credits via the iSAVE platform generate ongoing revenue independent of government grant schemes.
Performance
| Max Heating Output (A7/W35) | 25.0 kW |
| Heating COP Range (A7/W35) | 3.95 – 5.00 |
| Max Cooling Output (A35/W18) | 20.1 kW |
| Cooling EER Range (A35/W18) | 3.23 – 3.75 |
| Ambient Operating Range | −25 °C to 45 °C |
Technical Specifications
| Order Reference | CGK-080V4-B |
| Power Supply | 380–420V / 3Ph / 50Hz |
| Max Operating Current | 16.70 A |
| Recommended Breaker | 25 A |
| Compressor | HIGHLY DC Inverter Rotary (×2) |
| Control System | CHICO 4.3" Touchscreen |
| Refrigerant / Charge | R290 / 1.80 kg (GWP 3) |
| Sound Pressure Level | 63 dBA @ 1m |
Dimensions & Weight
| Unit Dimensions (L×D×H) | 1249 × 509 × 1558 mm |
| Net Weight | 220 kg |
Premium Components
HIGHLY® Dual Inverter Compressors
Twin rotary DC inverter compressors deliver exceptional efficiency across the full load range. The dual-compressor design provides built-in redundancy — if one compressor is serviced, the unit continues operating at reduced capacity, eliminating costly downtime in commercial settings.
Plate Heat Exchanger
A high-efficiency brazed plate heat exchanger ensures optimal thermal transfer between the refrigerant and water circuits — compact, durable, and resistant to fouling.
FUJIKOKI® Electronic Expansion Valve
Precise refrigerant flow control across all operating conditions enhances COP at part-load and maximises performance during seasonal extremes.
Match-well® Variable DC Fan
Variable-speed DC fan motor adjusts to match the thermal load — reducing power consumption, lowering noise during part-load operation, and extending component lifespan.
Intelligent Control
CHICO 4.3" Touchscreen Controller
The intuitive colour touchscreen provides on-site system management with real-time status, alarms, and operating history — designed for facilities managers and service engineers.
Key Functions:
- Heating, cooling, and DHW circuit management with independent set-points.
- Weather compensation and climate curve adjustment.
- Anti-Legionella, Defrost, and Antifreeze automated cycles.
- Multi-zone circulation pump control.
- Alarm logging with integrated fault diagnostics.
- SG Ready input for smart grid demand response.