1. Why CO₂ (R744)? Future-Proof Your Business & Compliance
As global F-Gas regulations tighten, traditional refrigerants are being phased out. Our R744 (CO₂) heat pump has a Global Warming Potential (GWP) of just 1 – the lowest possible. By adopting it today, you protect your projects from future regulatory bans, carbon taxes, and retrofit risks.
✅ EPC contractors & distributors can confidently bid on government green projects
✅ End-users receive a truly sustainable, zero-ozone-depleting heating solution
✅ Refrigerant charge: 1150g R744 – efficient and eco-friendly

2. 80°C Ultra-High Temperature: Zero-Hassle Boiler Replacement
Max outlet temperature: 80°C
- Works flawlessly with legacy radiator and piping systems – no costly infrastructure overhaul
- Drastically cuts installation time and labor costs
Wide operating range: -20°C to 43°C
- Full DC inverter + EVI compressor technology
- Eliminates winter complaints, post-sales freeze-related RMA, and emergency service calls
High efficiency even at high output
| Condition |
Heating Capacity |
COP |
| A20°C / W15→55°C |
7.0 kW |
3.71 |
| A20°C / W15→80°C |
6.94 kW* |
2.75* |
Super-heating & anti-freeze reliability
- EVI technology ensures continuous 24/7 hot water supply – no system freeze, no panic calls
Ultra-silent night mode
- Noise ≤53 dB(A) – perfect for luxury hotels, hospitals, and residential areas with strict noise regulations

3. Premium Components for Decade-Long Lifespan
- Compressor: Panasonic Full Inverter + EVI
- Heat exchanger: Optimized for CO₂ high-pressure operation
- Water connections: DN20, with water side pressure loss ≤50 kPa
- Weight: 85 kg – compact and robust
- Starting current: Only 0.5A – no grid shock
- Max input power/current: 3.1 kW / 14A

4. Product Technical Specifications
Below is the full parameter table for Model NL-J2BKK/CO2:
| Parameter |
Value |
| Model |
NL-J2BKK/CO2 |
| Rated voltage / frequency |
220V~50Hz |
| Heating capacity (A20°C, W15→W55°C) |
7.0 kW |
| Rated power (A20°C, W15→W55°C) |
1.89 kW |
| COP (A20°C, W15→W55°C) |
3.71 |
| Rated water flow rate (W15→W55°C) |
0.143 m³/h |
| Heating capacity (A20°C, W15→W80°C) |
≥6.9 kW |
| Rated power (A20°C, W15→W80°C) |
≤2.52 kW |
| COP (A20°C, W15→W80°C) |
≥2.75 |
| Rated water flow rate (W15→W80°C) |
~0.08 m³/h |
| Maximum outlet water temperature |
80°C |
| Starting current |
0.5 A |
| Maximum input power |
3.1 kW |
| Maximum input current |
14 A |
| Compressor type |
Panasonic Full Inverter + EVI |
| Refrigerant type / charge |
R744 (CO₂) / 1150g |
| Water inlet / outlet connection |
DN20 |
| Noise level |
≤53 dB(A) |
| Water side pressure loss (W15→W55°C) |
50 kPa |
| Unit weight |
85 kg |
5. Full-Scenario Applications – Unlock High-Margin Markets
Move beyond residential price wars. Our CO2 heat pump empowers you to dominate commercial and industrial niches:
- Hotels & Resorts
Product + scenario: NL-J2BKK/CO2 – central sanitary hot water
- Unlimited 80C hot water during peak tourist seasons
- Eliminates "cold shower" negative reviews
- Cuts annual gas bills by up to 80%
- Hospitals & Care Homes
Product + scenario: NL-J2BKK/CO2 – legionella-safe hot water + silent operation
- 80C output easily exceeds medical-grade legionella sterilization requirements (typically 60-70C)
- Ultra-low noise (<=53 dB) ensures patient rest
- Ideal for nursing homes, hospices, and operating theaters
- Industrial & Greenhouses
Product + scenario: NL-J2BKK/CO2 – continuous high-volume heating
- Industrial washing lines, surface treatment, food processing
- Greenhouse climate control – stable heating even at -20C
- Helps enterprises achieve ESG carbon reduction goals
- Commercial Office & Mixed-Use Buildings
Product + scenario: NL-J2BKK/CO2 – boiler replacement & radiant floor heating
- Direct drop-in for old gas/oil boilers
- Low starting current (0.5A) suits buildings with limited electrical capacity

6. Quick Installation Guide (for reference)
| Step |
Action |
| 1 |
Choose indoor or outdoor installation (IP rating suitable for outdoor) |
| 2 |
Connect DN20 water inlet/outlet – observe water flow direction |
| 3 |
Install magnetic filter / Y-strainer on inlet side to protect internal heat exchanger |
| 4 |
Connect 220V~50Hz power supply – dedicated circuit recommended (max 14A) |
| 5 |
Set target outlet temperature (up to 80C) via controller |
| 6 |
For below -10C ambient, add antifreeze solution (propylene glycol) in water loop |
| 7 |
Perform test run – check for leaks, stable compressor ramp-up, and noise level |
[Note] Always use certified technicians for CO2 refrigerant system (high pressure up to 120 bar).
7. Exceptional ROI – Rapid Payback for Your Clients
Replacing outdated gas/oil boilers with our CO2 heat pump delivers:
- Immediate OpEx savings – especially in regions with high gas prices or carbon taxes
- COP up to 3.71 at 55C output – extremely efficient for space heating
- Typical payback period: 2-3 years – a financial no-brainer for CFOs and facility managers
8. Certified for Global Markets – Win Bids with Absolute Confidence
- CE, CB, ERP A+++ certified
- Removes import barriers for distributors
- Acts as a powerful trust signal for municipal, hospital, and corporate tenders

9. Why Partner with NULITE? Your Reliable Factory Backing
- Direct factory pricing – maximize your channel margins
- OEM / ODM capabilities – build your own brand with customized solutions
- Proven track record – decades of heat pump manufacturing, exporting to 100+ countries
- Stable lead times – predictable delivery schedules

10. Ironclad Warranty & Support – Reduce Your TCO
We don't just ship boxes; we support your business:
- Comprehensive technical training
- Fast spare parts dispatch
- Solid OEM warranty policy
- Mitigate operational risks and safeguard your profits
[Download] Get Your 2026 Factory-Direct Price List & Project Solution
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