WPL 25 AC / WPL 25 ACS Air Source Hydronic Heating

Model Number - WPL 25 AC

• Energy efficiency class - A++
• Rated voltage - 400 V (3 phase)
• Output at A7/W35 (EN14511) - 14 kW
• Coefficient of performance at A7/W35 (EN14511) - 5.09
• Sound power level (EN 12102) - 54 dB(A)
• Sound pressure level at 5 m distance in a free field - 32 dB(A)
• Max. application limit on the heating side - 65°C
• Height - 1045 mm
• Width1 - 1490 mm
• Depth - 593 mm
• Weight - 175 kg

Model Number - WPL 25 ACS

• Energy efficiency class - A++
• Rated voltage - 230 V (single phase)
• Output at A7/W35 (EN14511) - 14 kW
• Coefficient of performance at A7/W35 (EN14511) - 4.82
• Sound power level (EN 12102) - 54 dB(A)
• Sound pressure level at 5 m distance in a free field - 32 
• Max. application limit on the heating side - 65°C
• Height - 1045 mm
• Width1 - 1490 mm
• Depth - 593 mm
• Weight - 175 kg

Market-leading Quality by STIEBEL ELTRON

• German made quality, designed for New Zealand conditions
• Advanced technology ensuring maximum efficiency
• Backed by leading STIEBEL ELTRON warranty and after sales support
• Compatible with optional accessories to get the most out of your product

Hydronic Heating Comfort

• Flow temperatures up to 65°C can be used for in-slab and radiator hydronic heating
• Silent operation thanks to encapsulated refrigerant circuit and isolated compressor
• WPL 25 AC(S) suitable for new builds as well as retrofits
• Smart Grid ready for connection to Solar PV and energy management systems

Ready for installation

• Available in single and 3 phase variants
• Compact mono block appliance for outdoor installation
• Options for a wall mounted and freestanding installation
• Integral anti-vibration mounts for direct connection to the heating system
• Easy access to the electrical connection panel without having to open the appliance
• Sold in perfectly matched sets with compact internal modules for straightforward and space saving installation

1. How does a hydronic heat pump work to heat my home?

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.

2. How noisy is a hydronic heat pump?

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.

3. Can a hydronic heat pump system still heat my home when it is cold outside?

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.

4. Can I use hydronic radiators with this heat pump?

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.

5. Where can I purchase a STIEBEL ELTRON hydronic heating heat pump from?

STIEBEL ELTRON is working closely with hydronic heating specialists throughout New Zealand. Feel free to get in touch and ask for a recommended installer.

6. Do I need three phase power to operate a hydronic heating heat pump?

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.

7. Can I control my hydronic heating heat pump from my mobile device?

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.