Heat Pump Parking Air Conditioner — Cab Heating & Cooling in One Unit

• Table of Contents

1. How reversible heat pump operation works
2. Operating range and supplementary heating
3. Heat pump value in fleet economics
4. Comparison: heat pump vs fuel-fired cab heater
5. Get a heat pump parking AC quote

Reversible heat pump parking AC delivers both summer cab cooling and winter cab heating from a single rooftop unit, completely independent of the main truck engine. For fleets operating across temperate climates — UK, Germany, Canada, Northern US, Eastern Europe, Australia — heat pump capability extends parking AC value across all four seasons instead of just summer. Heat pump operation is rated to -15°C ambient; below that, supplemental fuel-fired heaters handle the deepest winter.

How reversible heat pump operation works

A four-way reversing valve swaps the roles of the indoor and outdoor coils: in cooling mode the outdoor (rooftop) coil rejects heat, indoor coil absorbs it; in heating mode it reverses, with the outdoor coil absorbing heat from ambient air and indoor coil releasing it. Same compressor, same refrigerant — just flow direction changes. Provides 3–4 kW heating capacity from approximately 1.0 kW electrical input (COP 3–4) down to about -5°C ambient.

Operating range and supplementary heating

Heat pump mode operates efficiently from -15°C ambient to +5°C (heating mode), and from +10°C to +50°C (cooling mode). For colder operation (-20°C to -40°C in Canadian prairies, Mongolia, northern Scandinavia) a supplemental fuel-fired heater (Webasto Air Top 2000, Eberspächer Airtronic, Espar Airtronic) handles the coldest hours while parking AC heat pump handles shoulder seasons.

Heat pump value in fleet economics

Adding heat pump capability extends battery-powered cab climate control to 9–10 months of the year vs 4–5 months for cooling-only configurations. For UK / German / Canadian / Northern US fleets this doubles the value capture from one capital purchase. All VS02 PRO / ZH 1000 / VC 1000 / VC 2000 models include reversible heat pump mode standard at no extra cost — Vethy does not sell a cooling-only variant.

Comparison: heat pump vs fuel-fired cab heater

Webasto / Eberspächer fuel-fired heaters deliver excellent cold-weather performance to -40°C, burning ~0.2 L/hr diesel. They are the right tool for deep winter (-20°C and below). Heat pump parking AC handles 0°C to -15°C with zero fuel burn — ideal for shoulder seasons and milder winter climates. Many fleets run both: heat pump for shoulder seasons and savings, fuel-fired for deep winter.

Get a heat pump parking AC quote

Email sales@vethy.com or call +86-532-87729918 for spec sheets, sizing calculations and CIF pricing within 24 hours. Specify vehicle and operating climate — we recommend heat pump only, or heat pump plus fuel-fired heater combination based on minimum winter ambient.

Frequently asked questions

Does heat pump heating use the same battery as cooling?

Yes. Same auxiliary battery powers both modes. Heating mode typically draws 20–30% less power than cooling for equivalent comfort, so overnight heating runtime is longer than cooling runtime from the same battery.

Will it heat the cab in -25°C Canadian prairie winter?

Heat pump mode is rated to -15°C. For -20 to -40°C operation, pair with a fuel-fired cab heater (Webasto Air Top, Eberspächer Airtronic) which handles the deepest winter using small amounts of diesel.

Is heat pump mode an extra cost option?

No. All Vethy parking AC models include reversible heat pump operation at no additional cost.

Will heating mode dry out the cab air?

Heat pump heating does not actively dehumidify (unlike furnace heating). Cabin humidity stays at outdoor levels. Some fleets pair heat pump with a small dehumidifier in damp climates.