These sets pair the HPA-O Plus outdoor heat pump with the HSBC 220 integral cylinder, combining the DHW cylinder, buffer volume and hydraulic working parts into a single indoor appliance for the most space-saving positioning of the HPA-O Plus set options. Two capacities are available, both single-phase (HC 230).
7.09–10.07 kW
Output Range (A-7/W35)
HSBC 220 integral
Cylinder
Pricing on request
Every configuration on this page is supplied at price on request. Stiebel Eltron systems are matched to the property, so we confirm the full specification and cost with you directly before quoting. Please use the request a quote link on this page or contact our technical team with the property details below.
R290 refrigerant – installation clearances apply
These units use the natural refrigerant R290 (propane), which is mildly flammable (A3 classification). Installation must follow Stiebel Eltron's clearance and ventilation requirements for the refrigerant charge size, and electrical connection must be carried out by a competent electrician to Part P and BS 7671. Grid-connected units require a DNO notification (G98/G99) prior to commissioning.
Key features
Natural R290 refrigerant
Uses the natural refrigerant R290 (propane), GWP of just 3, future-proofed against F-Gas phase-down schedules affecting HFC refrigerants.
Two-module installation
Heat pump and cylinder are supplied and specified together, so the system installs with just two coordinated modules, saving time on site.
MyStiebel app control
The set includes the ISG Connect accessory, giving smartphone control of heating, cooling and DHW settings.
Active cooling capable
Can be used for efficient cooling through circuit reversal when paired with a compatible area heating system (additional accessories required).
High flow temperature for retrofit
Supports flow temperatures up to 75 °C, suitable for retrofit properties with radiators as well as new-build underfloor systems.
Choose your size
| Model |
MPN |
Electrical supply |
Output (A-7/W35) |
SCOP 35°C |
Sound power |
| HPA-O 07.2 Plus + HSBC 220 |
208424 |
HC 230 |
7.09 kW |
5.09 |
43 dB(A) |
| HPA-O 10.2 Plus + HSBC 220 |
208425 |
HC 230 |
10.07 kW |
4.96 |
46 dB(A) |
Full technical specification
| Specification |
HPA-O 07.2 Plus + HSBC 220 |
HPA-O 10.2 Plus + HSBC 220 |
| Product number (MPN) |
208424 |
208425 |
| Heat pump |
HPA-O 07.2 Plus HC 230 |
HPA-O 10.2 Plus HC 230 |
| Electrical supply |
HC 230 |
HC 230 |
| SCOP 35°C (EN 14825) |
5.09 |
4.96 |
| Heating output at A2/W35 (EN 14511) |
3.29 kW |
4.09 kW |
| Heating output at A-7/W35 (EN 14511) |
7.09 kW |
10.07 kW |
| Sound power level (EN 12102) |
43 dB(A) |
46 dB(A) |
– indicates a figure not separately published by the manufacturer for that model.
Smart control ready
Every set includes the ISG Connect accessory for MyStiebel app control and installer remote diagnostics.
Help us prepare your custom quote
Because Stiebel Eltron configurations are matched to the property, please have the following ready when requesting a quote:
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System configuration – will the heat pump run as a stand-alone heat source, or in a bivalent arrangement alongside an existing boiler or secondary heat source?
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Hot water demand – what is the expected DHW usage volume for the property (occupants, bathrooms, peak draw-off), or is DHW production not required?
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Hydraulic layout – does the property use an S-plan or Y-plan hydraulic arrangement, or another zoned configuration?
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Pre-plumbed preference – would a pre-plumbed cylinder/buffer assembly be preferred to reduce on-site installation time?
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Secondary return – does the property require a secondary return circulation loop for the DHW system?
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Installation restrictions – are there any size or positioning restrictions for the outdoor unit or indoor cylinder?
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Electrical supply – is a single-phase (HC 230) or three-phase (HC 400) power supply available at the property?
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Pump groups – how many pump groups are required downstream of the buffer on the secondary (heating distribution) side?
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Control logic – should the system be controlled by the OEM heat pump manager, or integrated with a third-party room thermostat/BMS via Modbus or KNX?
Frequently asked questions
What does the HSBC 220 integral cylinder add to these sets?
The HSBC 220 integral cylinder is the indoor DHW/hydraulic component paired with the outdoor heat pump in each of these sets. Heat pump and cylinder are supplied and specified together, simplifying ordering and installation.
What is the difference between the sizes shown?
Each size uses a different capacity outdoor heat pump paired with the same cylinder type. Sizing should be based on the property's calculated heat loss and hot water demand — contact us for guidance.
Why does this range use R290 instead of a common HFC refrigerant?
R290 (propane) is a natural refrigerant with a Global Warming Potential of around 3, compared with hundreds or thousands for many HFC refrigerants. It is mildly flammable, so installation clearances and ventilation requirements must be followed.
Can these sets provide cooling as well as heating?
Yes, active cooling is available by circuit reversal when paired with a compatible area heating system such as underfloor heating (additional accessories required).
What is MyStiebel app control and is it included?
The MyStiebel app allows smartphone control of heating, cooling and DHW settings. The ISG Connect Internet Service Gateway accessory needed for this is included in every set on this page.
Why is pricing shown as 'on request'?
Every installation is specified to the property, so pricing is confirmed once we know your configuration. Use the questions below or contact our technical team for a tailored quotation.
