RPS95
Redring
9.5 kW
Instant Water Heater
Unvented
Under Sink
Redring Powerstream RPS95 9.5kW Instant Water Heater — Compact unvented under-sink instant water heater for basins or shower | 9.5 kW single-phase output | Instant hot water on demand | A-rated efficiency | Low sound level (15 dB) | IPX4 rated | No flue or gas required | Ideal for small bathrooms, cloakrooms, kitchens or utility rooms | 2-year warranty | MPN: RPS95
✅ Instant hot water without a boiler – perfect for small spaces or additional outlets
Supplies up to two basins or one basin and shower. Energy efficient A-rated with 39% efficiency. Requires 6 mm² / 10 mm²* supply cable (*for runs over 10m). Dynamic pressure min 0.7 bar (basin) / 1.0 bar (shower), max 10.3 bar. Includes 1/2" BSP to 15mm adapters.
The Redring Powerstream RPS95 is a compact, efficient instant water heater that provides unlimited hot water on demand without a storage tank or boiler. Rated at 9.5 kW on single-phase 230V, it heats water instantly as it flows through – ideal for under-sink installation in small bathrooms, cloakrooms, kitchens or utility rooms where space is limited.
With A-rated energy efficiency (39%) and low sound level (15 dB), it's economical and quiet in operation. The unit is IPX4 rated for splash protection and requires no flue or gas supply – zero carbon monoxide risk. Supplies a maximum of two basins or one basin and shower (with mixer unit). Use individual pillar taps for basins – no mixer taps. Installation must include a service valve on inlet, and if non-return valve fitted, add 3.5 bar PRV & 6 bar expansion valve. 2-year warranty – register online.
What Makes the Redring Powerstream RPS95 Special?
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Instant On-Demand Hot Water — Heats as it flows – unlimited supply, no waiting or storage losses.
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Compact Under-Sink Design — Fits in tight spaces – upright or lengthways orientation (not upside down).
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A-Rated Efficiency — 39% efficient, 473 kWh/annum consumption – energy-saving operation.
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Quiet Running — Only 15 dB – suitable for living areas or bedrooms.
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No Flue or Gas — Electric operation – zero CO risk, easy install in any property.
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Flexible Supply — Serves up to two basins or basin + shower (with mixer kit).
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2-Year Warranty — Covers manufacturing defects – register online for full protection.
Key Features
9.5 kW OutputSingle-phase 230V – suits most UK domestic supplies.
Instant HeatingHot water in seconds – no tank or preheat needed.
A-Rated39% efficiency – low running costs.
Low Noise15 dB – whisper-quiet operation.
IPX4 RatedSplash-protected – safe for bathroom use.
Flow RateBasin: 3–6 l/min, Shower: 4–7 l/min (depending on inlet temp).
Included Adapters2 x 1/2" BSP to 15mm compression – easy copper pipe connection.
Technical Specifications
| Specification |
Value |
| MPN / SKU |
RPS95 |
| Power Rating |
9.5 kW |
| Power Supply |
230 V AC, Single Phase |
| Current Draw |
41 A |
| Recommended Breaker |
40 A |
| Recommended Cable Size |
6 mm² / 10 mm²* (*for runs over 10m or not flat clipped) |
| Dynamic Pressure (Basin) |
Min 0.7 bar (10 psi) / Max 10.3 bar (150 psi) |
| Dynamic Pressure (Shower) |
Min 1.0 bar (15 psi) / Max 10.3 bar (150 psi) |
| Connections |
1/2" BSP inlet/outlet (adapters to 15mm included) |
| Flow Rate @ 30 °C Rise |
3.0–6.0 l/min (varies by inlet temp) |
| IP Rating |
IPX4 |
| ErP Efficiency Class |
A (39% efficiency) |
| Annual Consumption |
473 kWh |
| Sound Level |
15 dB |
| Dimensions (H × W × D) |
160 × 307 × 74 mm |
| Weight |
2.9 kg |
| Warranty |
2 years |
What's in the Box
✔ 1 × Redring Powerstream RPS95 9.5kW Unit
✔ 2 × 1/2" BSP to 15mm compression adapters
✔ Fixing screws & wall plugs
✔ Installation & user guide
✅ Installation by qualified electrician/plumber per BS.7671 & building regulations. If non-return valve fitted, add 3.5 bar PRV & 6 bar expansion valve. Not for mixer taps, baths or kitchen sinks (hand-washing only). Use pillar taps for basins. Supply cable 6 mm² / 10 mm²* (*runs over 10m). Service valve on inlet required. Isolate supplies before removing cover. 2-year warranty – register online with Redring.
Frequently Asked Questions
Can it supply a shower?
Yes – with Redring RM3 mixer unit (sold separately). Min dynamic pressure 1.0 bar for shower.
What outlets can it serve?
Max two basins or one basin + shower. Not for baths or kitchen sinks (hand-washing only).
What cable size is needed?
6 mm² for runs under 10m (flat clipped); 10 mm² for longer runs or not flat clipped. 40A breaker.
Is it energy efficient?
Yes – A-rated with 39% efficiency, 473 kWh annual consumption. Instant heating reduces waste.
Can it be installed upside down?
No – must be upright or lengthways to maintain IPX4 rating & performance.
What if I have a non-return valve?
Add 3.5 bar pressure reducing valve & 6 bar expansion valve to the inlet.
Who installs it?
Suitably qualified electrician/plumber per BS.7671 & Part P regulations.
