The Panasonic PAW-TD20C1E5UK-1 is a 192 litre stainless steel DHW cylinder purpose-built for the Aquarea heat pump range, rated Energy Class A and supplied complete with a 20 metre temperature sensor cable. The stainless inner tank is anode-free and requires no periodic maintenance — a genuine advantage over enamelled alternatives that need a sacrificial anode checked and replaced over their service life. Manufactured for Panasonic by OSO, a specialist in stainless hot water storage.
Class A
Energy efficiency
1.5 kW
Electric backup heater
Anode-free — no periodic maintenance
Unlike enamelled cylinders that rely on a sacrificial anode needing periodic inspection and replacement, the stainless steel construction of this tank is corrosion-resistant by design. Panasonic confirm no maintenance is required over the life of the cylinder.
3-port valve accessory sold separately
This cylinder requires a 3-port diverter valve — either the Panasonic PAW-3WYVLV-HW or CZ-NV1 — to control switching between space heating and DHW production. This is an optional accessory and is not included with the cylinder.
Key features
192 litre capacity
Sized for typical 2–3 bedroom UK households — a practical mid-range capacity within the Panasonic stainless steel tank line-up.
Stainless steel inner tank
Corrosion-resistant stainless construction, anode-free and requiring no periodic maintenance — a lower-hassle alternative to enamelled tank designs.
Energy Class A efficiency
Rated Energy Efficiency Class A with standing heat loss of just 0.99 kWh/24h under EN 12897 insulated test conditions — minimal standby losses from the cylinder itself.
Large heat exchange surface
1.8 m² exchange surface area supports efficient heat transfer from the heat pump primary circuit into stored hot water, even at the lower flow temperatures typical of heat pump operation.
Complete with 20m sensor
Ships with a 20 metre temperature sensor cable included — sized for typical routing distances between the cylinder and the Aquarea outdoor unit or controller without needing a separate purchase.
1.5 kW electric backup heater
Built-in immersion element provides backup DHW heating and supports Anti-Legionella disinfection cycles alongside the heat pump.
Technical specification
| Model code |
PAW-TD20C1E5UK-1 |
| Type |
Stainless steel unvented DHW cylinder |
| Water volume |
192 litres |
| Maximum water temperature |
75°C |
| Dimensions — height |
1270 mm |
| Dimensions — diameter |
595 mm |
| Weight (empty) |
53 kg |
| Electric backup heater |
1.5 kW |
| Power supply |
230V |
| Tank material |
Stainless steel (anode-free) |
| Exchange surface area |
1.8 m² |
| Standing energy loss (65°C, EN 12897) |
0.99 kWh/24h |
| Energy losses |
42 W |
| Energy Efficiency Class |
A |
| Temperature sensor |
20 metre cable — included |
| 3-port valve accessory |
PAW-3WYVLV-HW or CZ-NV1 (optional, sold separately) |
| Standard EN 12897 (2016) |
Compliant |
| Maintenance required |
None |
| Warranty |
2 years |
| Manufactured by |
OSO (for Panasonic) |
What's in the box
- Panasonic PAW-TD20C1E5UK-1 192L stainless steel cylinder
- 20 metre temperature sensor cable
- Manufacturer installation and operation manual
What you'll also need (sold separately)
- 3-port diverter valve — PAW-3WYVLV-HW or CZ-NV1
- Compatible Panasonic Aquarea outdoor unit
- G3 unvented safety kit components as required by your system design
- Discharge pipework to a suitable tundish and drain point
Frequently Asked Questions
Does this cylinder need periodic maintenance?
No — Panasonic confirm this stainless steel tank is anode-free and requires no periodic maintenance, unlike enamelled alternatives that need a sacrificial anode inspected over the cylinder's service life.
Is the temperature sensor included?
Yes — the cylinder ships complete with a 20 metre temperature sensor cable, sized to reach typical Aquarea outdoor unit or controller locations without a separate purchase.
Do I need to buy a 3-port valve separately?
Yes — the PAW-3WYVLV-HW or CZ-NV1 3-port valve is required to switch the system between space heating and DHW production, and is sold as a separate optional accessory.
What size household does 192L suit?
192 litres is a practical mid-range capacity, typically suiting 2–3 bedroom UK households with 1–2 bathrooms. Panasonic also offer a 300L stainless variant for larger households — check our listings if you need more capacity.
Is this cylinder unvented?
Yes. As with any unvented hot water cylinder, installation and commissioning must be carried out by a G3-qualified installer in accordance with UK Building Regulations.
Is this cylinder compatible with the whole Aquarea range?
The PAW-TD20C1E5UK-1 is designed for use across the Panasonic Aquarea air-to-water range. Confirm compatibility with your specific outdoor unit generation and any third-party control components before ordering — we're happy to check this for you.
