A‑Therm80

High‑Temperature R290 Air Source Heat Pump

The A‑Therm80 is a single‑stage, high‑temperature air source heat pump using natural refrigerant R290 (propane). It is designed specifically for boiler replacement and high‑temperature retrofit applications, delivering up to 80°C flow temperature even at external ambient conditions as low as ‑20°C. The A‑Therm80 enables decarbonisation of existing heating systems without the need for major changes to emitters or distribution infrastructure. The range is provided in the UK by Pure Thermal.

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Range Overview:

  • 2-Pipe reversible functionality.
  • Max Output Temperature: 80°C
  • 20°C — Wide Delta T Capability. Greater flexibility in system design.
  • Min External Temperature: -20°C
  • Minimum Cooling Output Temperature: -10°C
  • Nominal Capacity: 300kW
  • Range Options: 11
  • Refrigerant: R290 (Natural/GWP = 3)
  • 80°C — Maximum Hot Water Output. First single-stage R290 to achieve this.
  • -20°C — Flexible DT option inlet-outlet range from 5°C to 20°C
  • 40 bar — Operating Pressure. K65 copper alloy pipework.
  • Optimised Defrost — Low Energy. Defrost Operation.

Key Technical Capabilities:

80°C High‑Temperature Output – Single Stage

  • Delivers 80°C leaving water temperature down to ‑20°C ambient conditions.
  • Typical operating duty of 80/60°C without cascade or booster stages.

Twin Refrigeration Circuits with Active Defrost Stability

  • Two independent refrigeration circuits per unit.
  • Allows continued heating output during defrost events, improving system stability.

Modular & Multi‑Unit System Architecture

  • Designed for scalable, parallel multi‑unit operation.
  • High redundancy and part‑load performance with system turndown as low as 4–4.5%.

High‑Pressure, High‑Temperature Refrigeration System

  • Operating pressures up to 40 bar.
  • K65 copper pipework rated to 130 bar ensures safe high‑temperature operation.

Inverter‑Driven Modulation & Seasonal Efficiency

  • Independent inverter control on each compressor.
  • Improved seasonal efficiency particularly under part‑load conditions.

Wide Temperature Differential (ΔT) Capability

  • Standard ΔT of 10°C with optional operation up to 20°C.
  • Enables reduced flow rates and improved integration with legacy systems.

Multi‑Unit Defrost Management (MUDM)

  • Defrost cycles intelligently coordinated across multiple units.
  • Maintains stable system temperatures in large multi‑unit installations.

Natural Refrigerant – R290 (Propane)

  • GWP of 3 and F‑Gas free refrigerant selection.
  • Future‑proof solution aligned with tightening environmental regulations.

Frascold R290‑Optimised Compressors

  • Semi‑hermetic inverter‑driven reciprocating compressors.
  • Optimised for high‑temperature R290 performance and low ambient operation.

ATEX & DSEAR‑Aligned Safety Systems (Standard)

  • Integrated refrigerant leak detection and ATEX ventilation.
  • ATEX‑rated refrigerant components designed to support DSEAR compliance.

Positioning Summary

High‑temperature R290 air source heat pump delivering 80°C from a single‑stage system. Ideal for boiler replacement and high‑temperature retrofit projects, offering modular scalability, stable defrost performance, and full UK support from Pure Thermal.