WPL 25 AC / WPL 25 ACS
- Made in Germany
- Outdoor installation to harvest energy from the air and turn it into comfortable warmth in your home
- Single phase and 3 phase models available
- High efficiency due to vapour injection technology: COP of 5
- Market leading sound technology: quiet operation at 46 dB(A) from 1 m distance
- 65°C flow temperatures suitable for radiator heating
- Designed for New Zealand homes
- Suited for new builds as well as renovations
- Natural defrost function for energy efficient operation even in cold climates down to -20°C
- Smart Grid and Solar PV ready
Product Overview
Enjoy comfortable warmth in your home during the chilly winter months thanks to the WPL 25 AC(S) range of air source hydronic heat pumps from STIEBEL ELTRON. Heating your home with energy harvested from the air, hydronic heating is a cost-effective way to keep your home warm and cosy. Designed for outdoor installation in New Zealand conditions, the WPL 25 AC and WPL 25 ACS systems is a perfect start for the transition from fossil fuels to renewable energies in your home. As nearly 40% of energy consumed in New Zealand homes is used for heating and cooling, it makes perfect sense to install an energy-efficient appliance and reduce the ongoing cost of your heating system tremendously.
Product Details
STIEBEL ELTRON's efficient inverter technology allows the WPL 25 AC(S) to offer an exceptionally high COP of 5, while keeping operating sound to a minimum thanks to an encapsulated refrigerant circuit and acoustically isolated compressor. Enhanced saturated vapour injection enables high flow temperatures of up to 65°C, making the WPL 25 AC(S) ideal for in-slab and radiator heating applications.
The WPL 25 AC(S) range is available in both single-phase (ACS) and three-phase (AC) variants. STIEBEL hydronic heat pumps can be paired with optional accessories such as the ISG web unit, allowing remote control from your home network or mobile device.
STIEBEL ELTRON is a pioneer in home energy management: all hydronic heat pump models are compatible with solar PV systems and SmartGrid integration—helping increase self-consumption and reduce energy bills.
Market-leading Quality by STIEBEL ELTRON
- German-made quality, designed for New Zealand conditions
- Advanced technology ensuring maximum efficiency
- Backed by STIEBEL ELTRON’s leading warranty and after-sales support
- Compatible with optional accessories to maximise performance
Hydronic Heating Comfort
- Flow temperatures up to 65°C suitable for in-slab and radiator hydronic heating
- Silent operation thanks to encapsulated refrigerant circuit and isolated compressor
- WPL 25 AC(S) is ideal for both new builds and retrofit applications
- SmartGrid ready — compatible with solar PV and energy management systems
Ready for Installation
- Available in single and three-phase variants
- Compact mono block unit designed for outdoor installation
- Wall-mounted or freestanding installation options
- Integral anti-vibration mounts for direct connection to heating system
- Easy access to the electrical panel without opening the appliance
- Sold in matched sets with compact internal modules for straightforward, space-saving installation
Technical Data
| Model Number | WPL 25 AC | WPL 25 ACS |
| Energy efficiency class | A++ | A++ |
| Rated voltage | 400 V (3 phase) | 230 V (single phase) |
| Output at A7/W35 (EN14511) | 14 kW | 14 kW |
| Coefficient of performance at A7/W35 (EN14511) | 5.09 | 4.82 |
| Sound power level (EN 12102) | 54 dB(A) | 54 dB(A) |
| Sound pressure level at 5 m distance in a free field | 32 dB(A) | 32 |
| Max. application limit on the heating side | 65°C | 65°C |
| Height | 1045 mm | 1045 mm |
| Width | 1490 mm | 1490 mm |
| Depth | 593 mm | 593 mm |
| Weight | 175 kg | 175 kg |
Downloads
FAQ
Air source heat pumps use a refrigeration circuit to harvest energy from the air. This energy is then used to heat the water which is pumped through a hydronic heating circuit, such as in-slab piping or radiators, to warm your home.
Hydronic heat pumps from STIEBEL ELTRON are the quietest on the market thanks to an encapsulated refrigerant circuit and acoustically isolated compressor. Advanced sound engineering guarantees that heat pumps from STIEBEL ELTRON can be used in neighbourhoods with a dense population. Many models even feature an additional silent mode.
Yes, hydronic heat pumps from STIEBEL ELTRON are engineered to operate energy efficiently even when outside temperatures fall below zero. Advanced technology from Germany ensures efficiency even at cold temperatures down to -20°C. For instance, the natural defrost function of the WPL 25 AC(S) comes into play in temperatures around 0°C to ensure a smooth and efficient operation when it becomes frosty in New Zealand winter.
Yes, STIEBEL ELTON offers a wide range of hydronic heat pumps which serve as heat source for either under floor heating or radiator heating, or both. This depends on the models' flow temperatures. Please consult with a STIEBEL expert to identify the right system for your needs.
STIEBEL ELTRON is working closely with hydronic heating specialists throughout New Zealand. Feel free to get in touch and ask for a recommended installer.
STIEBEL ELTRON offers both single and three phase models. The letter S in the model description stands for single phase, such as the WPL 25 ACS. Please also check the technical details on the product page of your model or contact STIEBEL ELTRON for further advice.
All STIEBEL ELTRON heat pumps in New Zealand are offered with an optional ISG web, which allows you to control and monitor your heating system via a home network or mobile device.