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  • Industrial pipeline system with tall shiny metal ducts on a snowy landscape, metal supports, distant trees, and a pale winter sky.

    Air-Source Heat Pumps

    As the critical first link in the heat pump chain, Güntner's heat collector maximizes evaporative efficiency and low-temperature viability — shaping system-wide COP from the very first stage.
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WHAT’S AT STAKE FOR AIR-SOURCE HEAT PUMPS

In air-source heat pumps, heat collector performance shapes real-world efficiency, cold-climate capability, and defrost behavior — defining system success from the very first stage

  • Seasonal Efficiency (SCOP)

    Real performance across all operating conditions drives operating cost — not just a single lab COP value.

    Industrial building with a tall green cylindrical structure, white framework, and chain-link fencing, partly obscured by leafy tree branches in the foreground.

  • Cold-Climate Evaporation

    Low-temperature efficiency defines winter performance and system reliability.

    Industrial pipes and cooling towers covered in snow, metal structures with ladders, set in a winter forest with snow on the ground and trees.

  • Frost & Defrost Management

    Optimized defrost behavior ensures continuous heat extraction and stable operation even in winter.

    Close-up of vertical wavy frost patterns on a glass surface, with a dark, blurred background and a cool, muted colour palette.
Industrial rooftop with tall polished metal chimneys and vented ducts, metallic cladding, cables and grilles against a clear blue sky.

RIGHT FROM SPECIFICATION

Heat collector decisions made early define real-world performance. Güntner supports design from the initial concept phase to address critical air-side factors:

  • Ambient conditions and low-temperature evaporation

  • Installation layout (distance, height, surroundings)

  • Air circulation strategy (blow-through vs. draw-through)

  • Frost and defrost strategy

These parameters directly impact field performance beyond lab conditions.

ENGINEERED FOR REAL-WORLD PERFORMANCE

True performance is defined not in ideal conditions, but in the field. Under real operating environments including wind exposure, air recirculation, frost formation, and installation constraints maintaining stable and reliable performance requires more than standard design approaches. Güntner heat collectors are developed with a clear focus on these real-world challenges:

  • Wind stability — Optimized airflow design supports uniform evaporation and consistent operation, even under varying wind conditions
  • Controlled air management — CFD-based layouts reduce recirculation effects and support stable thermal performance
  • Frost management — Carefully engineered fin geometry, coatings, and coordinated defrost strategies help maintain longer operating cycles and faster recovery
  • Proven reliability — Validated through laboratory testing and demonstrated across diverse climates worldwide

The result: consistent seasonal performance (SCOP) that aligns with design expectations — delivered in practice, not only in theory.

Industrial data hall with stainless steel piping, valves and insulated ducts running along a central walkway, supported by metal frames and brown girders.

SUSTAINABILITY – ACCELERATING DECARBONIZATION

Heat pumps already play a key role in energy transition. Güntner enhances this impact with natural refrigerant solutions:

  • CO₂, NH₃, and propane (R290) systems enable low-GWP operation

  • CO₂ systems support high pressures up to 130 bar

  • Efficient heat extraction even at -25 ℃ conditions

This allows high efficiency without compromising environmental targets.

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PERFORMANCE IN PRACTICE

WHY GÜNTNER HEAT COLLECTORS

  • PROVEN IN CO₂

    Design pressure up to 130 bar — validated in multiple transcritical CO₂ heat pump projects.

  • QUIET & SAFE

    Low-noise operation, optimized airflow, safe handling, and corrosion protection for installations close to inhabited areas.

  • MULTI-REFRIGERANT READY

    Engineered for a wide range of working fluids — NH₃, CO₂, propane (R290), and glycol — without compromising evaporative efficiency.

  • WIDE MODEL RANGE

    Flat, vertical, and V-shaped designs suit any installation site — from compact rooftop setups to large district heating fields.

AIR SOURCE HEAT PUMP HEAT COLLECTORS

Our heat collector portfolio is engineered for low-temperature evaporation, continuous operation, and natural refrigerants — keeping heat pumps stable and efficient across all seasons.