Heat pump

Frost NAOS Natural H 35

Highly efficient 4-pipe heat pump with R290 (propane)
This state-of-the-art 4-pipe heat pump has been specifically developed for the flexible, simultaneous or independent provision of chilled and hot water. Thanks to cutting-edge inverter technology and the environmentally friendly refrigerant R290, the unit offers maximum energy efficiency with a minimal environmental footprint. The device features robust enclosure panels and integrated sound insulation in the compressor compartment to ensure extremely quiet operation.
Equipped with a factory-integrated hydraulic kit (1 pump) and a 100-liter buffer tank, the unit is ready for immediate operation and can be seamlessly integrated into complex building systems.
Key technical data at a glance:
• Cooling capacity: 14.1 – 35.3 kW (modulating)
• Heating capacity: 19.2 – 39.5 kW (modulating)
• Refrigerant: R290 (propane – future-proof and GWP-compliant)
• Compressor configuration: 1 highly efficient, semi-hermetic reciprocating compressor / 1 refrigeration circuit
• System type: 4-pipe unit

Intelligent operating modes for maximum energy savings
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• Flexible 4-pipe logic system: Complete hydraulic separation of air conditioning and domestic hot water (DHW). The control system regulates the pumps fully automatically as needed and allows for exclusive DHW activation via a digital input.
• Highly efficient combined cycle (simultaneous operation):
• In cooling mode: When DHW is required, the system utilizes complete heat recovery. It provides free hot water while the fan stops.
• In heating mode: The system prioritizes DHW production and automatically switches back to room heating once the setpoint is reached.

• On-demand individual operation: Efficient single-mode operation for cooling, heating, or hot water only, with precise inverter control to avoid partial load losses.

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