Direct Heating System
High-Efficiency Commercial Heat Pumps
Engineered for high-volume commercial installations delivering immediate 60°C hot water in a single pass without needing long circulation cycles.
- Instant Single-Pass Heating to 60°C
- Reduced Tank Capacity Requirement
- Copeland EVI Scroll Compressor
- Intelligent Defrosting System
How Direct Heating Systems Work
Cold Water Feed
Cold tap/utility water enters the heat pump unit directly from the main supply or raw tank.
Single-Pass Heat Exchange
Water flows through high-efficiency tube-in-shell/titanium heat exchanger and heats directly to 60°C in one pass.
Direct Tank Fill
Pre-heated 60°C hot water is pumped straight into the insulated storage tank for immediate use.
Zero Re-circulation
Eliminates continuous re-circulation losses, saving significant pump electricity and heat loss.
Direct Heating Model Specifications
| Parameter / Model | NS-DH-12KW | NS-DH-25KW | NS-DH-50KW | NS-DH-100KW |
|---|---|---|---|---|
| Heating Capacity (kW) | 12 kW | 25 kW | 50 kW | 100 kW |
| Hot Water Output (L/H at 60°C) | 300 LPH | 620 LPH | 1,250 LPH | 2,500 LPH |
| Rated Power Input (kW) | 2.8 kW | 5.9 kW | 11.8 kW | 23.6 kW |
| Coefficient of Performance (COP) | 4.25 | 4.23 | 4.23 | 4.23 |
| Outlet Water Temperature | 60°C Direct | 60°C Direct | 60°C Direct | 60°C Direct |
| Compressor Type | Copeland Scroll | Copeland Scroll | Dual Copeland Scroll | Multi Copeland Scroll |
| Power Supply | 220V/50Hz | 380V/50Hz (3PH) | 380V/50Hz (3PH) | 380V/50Hz (3PH) |
Direct Heating vs Circulation Heating
Direct Heating System
Instant target temperature output without needing full tank heating cycle first.
- Delivers 60°C hot water immediately on startup.
- Higher thermal efficiency with single-pass water flow.
- Smaller buffer storage tank required.
- Ideal for high peak-hour hot water demands.
Circulation Heating System
Gradually heats the entire tank water volume over multiple cycles.
- Water temperature rises gradually (e.g., 20°C → 35°C → 50°C → 60°C).
- Requires complete heating cycle before full usage.
- Larger storage tank mandatory for peak demand backup.
Where Direct Heating Works Best
Hotels & Lodges
Instant hot water delivery for morning peak shower hours across hundreds of guest rooms.
Hospitals & Commercial Laundries
Continuous hot water for high-temperature washing, sanitation, and laundry operations.
Industrial Canteens & Hostels
Instant batch supply for cooking, washing, and shift-change worker showers.