Indirect Heating System
Indirect Heating Heat Pump Systems
Engineered for harsh water quality, industrial processing, and chemical fluid heating. Uses an isolated intermediate heat exchanger loop to protect core equipment from scaling, corrosion, and pressure spikes.
Scaling Risk on Condenser
0
%
Isolation from Raw Water
0
%
Yrs Equipment Extended Life
0
+
Why Choose Indirect Heating?
Zero Scaling & Corrosion
Hard water or ground water never comes in direct contact with the delicate heat pump condenser, eliminating scale buildup permanently.
Chemical & Fluid Versatility
Ideal for process industries heating acidic solutions, alkalis, milk, or food-grade liquids using specialized titanium exchangers.
High Pressure Decoupling
Isolates the high-pressure building water loop from the primary heat pump circuit, preventing hydraulic shock and vibration.
Indirect System Model Specifications
| Model Parameter | NS-IND-20KW | NS-IND-45KW | NS-IND-90KW | NS-IND-180KW |
|---|---|---|---|---|
| Heating Capacity (kW) | 20.5 kW | 45.0 kW | 90.0 kW | 180.0 kW |
| Exchanger Type | Braze Stainless PHE | Braze Stainless PHE | Titanium Shell & Tube | Gasketed Double-Wall PHE |
| Water Output Volume | 500 L/H | 1,100 L/H | 2,250 L/H | 4,500 L/H |
| Rated Power Input | 4.8 kW | 10.5 kW | 21.0 kW | 42.5 kW |
| Water Quality Suitability | TDS up to 2000 ppm | TDS up to 2000 ppm | High Salt / Chemical | Industrial Effluents |
| Max Operating Temp | 65°C | 65°C | 75°C High Temp | 75°C High Temp |
Indirect vs Direct Heating Systems
Indirect Heating System
- Completely eliminates internal tube scaling and efficiency drop over time.
- Extremely long lifespan with minimal maintenance costs.
- Can heat corrosive fluids, brine, or hard groundwater safely.
- Easy servicing via secondary plate exchanger flushing.
Direct Heating System
- Higher risk of hard water mineral buildup inside the main unit.
- Requires soft water plant or frequent chemical descaling.
- Cannot handle corrosive fluids or high chemical content.