The Stiebel Eltron WWK 304 ZA is an integrated domestic hot water heat pump with a 302L nominal cylinder capacity. It uses heat from the surrounding air to heat domestic hot water and is designed for supplying one or more hot-water draw-off points.

The unit is suitable for outdoor installation and includes an LCD control interface. It can also be integrated with a photovoltaic system through the appropriate energy-management or switching equipment.

Key Features

• 302L nominal hot-water cylinder capacity

• Integrated domestic hot water heat pump

• Designed for outdoor installation

• Suitable for one or more hot-water draw-off points

• Heat pump operation up to 65°C

• COP of 2.91 under EN 16147 A20 conditions

• Energy efficiency class A under the specified test conditions

• LCD control interface

• Photovoltaic integration capability

• Low operating noise

• Suitable for residential hot-water applications

Technical Specifications

• Brand: Stiebel Eltron

• Model: WWK 304 ZA

• Product Number: 203871

• Product Type: Integrated domestic hot water heat pump

• Nominal Capacity: 302L

• Nominal Load Profile: XL

• COP: 2.91 at A20 / EN 16147

• Average Heating Output: 1.6kW at A15 / W10–55

• Maximum DHW Temperature with Heat Pump: 65°C

• Maximum Available Nominal DHW at 40°C: 457L at A20

• Operating Temperature Range of Heat Source: -5°C to +42°C

• Sound Pressure Level: 45dB(A) at 1m

• Sound Power Level: 56dB(A)

• Dimensions: 1905 × 690mm

• Power Supply: 220–240V, 50/60Hz

• Safety Valve Connection: Rp 3/4

• Installation: Outdoor