EVI Heat Pump
EVI Heat Pump System
Engineered with Enhanced Vapor Injection (EVI) scroll compressors to supply reliable 60°C – 65°C hot water even in extreme cold climates down to -25°C.
- Operates seamlessly at -25°C
- High COP at Sub-Zero Ambient
- High COP Efficiency up to 4.25
- Low Power Consumption Design
How EVI Technology Works
Enthalpy Enhancement
Secondary refrigerant gas is injected into the middle chamber of the scroll compressor, boosting enthalpy and mass flow.
Sub-Cooling Circuit
Economizer sub-cools the main liquid refrigerant, increasing low-temperature heating capacity by up to 30%.
High Pressure Discharge
Generates steady 60°C - 65°C hot water output even during severe freezing Himalayan winter weather.
Smart Defrost Cycle
Microprocessor detects frost build-up on evaporators and executes ultra-fast auto defrosting cycles.
Direct Heating Model Specifications
| Parameter / Model | NS-EVI-18KW | NS-EVI-35KW | NS-EVI-75KW | NS-EVI-150KW |
|---|---|---|---|---|
| Heating Capacity (kW) | 18 kW | 35 kW | 75 kW | 150 kW |
| Ambient Temp Working Range | −25°C to 43°C | −25°C to 43°C | −25°C to 43°C | −25°C to 43°C |
| Max Outlet Water Temp | 60°C - 65°C | 60°C - 65°C | 60°C - 65°C | 60°C - 65°C |
| Compressor Technology | Copeland EVI Scroll | Copeland EVI Scroll | Dual Copeland EVI Scroll | Multi Copeland EVI Scroll |
| COP at −7°C Ambient | 2.85 | 2.90 | 2.95 | 3.00 |
| Eco Refrigerant | R410A / R32 | R410A / R32 | R410A / R32 | R410A / R32 |
| Power Supply | 380V/50Hz (3PH) | 380V/50Hz (3PH) | 380V/50Hz (3PH) | 380V/50Hz (3PH) |
EVI System vs Standard Heat Pump
EVI Heat Pump System
Specifically engineered for sub-zero mountain regions and harsh winter climates.
- Operates reliably down to -25°C ambient temperatures.
- Maintains 60°C water output without heavy electric heater backup.
- Up to 30% higher heating efficiency in freezing conditions.
- Advanced intelligent anti-icing & fast defrosting logic.
Standard Heat Pump System
Designed for moderate climates (0°C to 45°C ambient temperatures).
- Struggles and loses heating capacity below 5°C.
- Requires continuous high-wattage electric backup below 0°C.
- Evaporator coils freeze frequently in cold weather.
Ideal Applications for EVI Heat Pumps
Himachal, Leh & J&K Hotels
Uninterrupted hot water and central space heating for high-altitude luxury resorts and hotels during sub-zero winters.
Cold Region Hospitals & Hostels
24/7 heavy-duty hot water supply for sanitation, patient care, and student accommodation in Northern India.
Cold Climate Industrial Processing
Process water heating for food processing, chemical, and textile plants operating in freezing winter conditions.