The Panasonic Aquarea T-CAP Monobloc J Generation is Panasonic's cold-climate R32 monobloc range, built around T-CAP (Total Capacity) technology that sustains full rated output down to -15°C ambient — no capacity drop-off, no reliance on backup heat, even on the coldest UK days. Available in 9 kW and 12 kW single-phase, and 16 kW three-phase. Panasonic's own EN14511 data shows all three variants hold their full nameplate output at -15°C / W45°C — a genuinely different proposition to a standard monobloc that derates in cold weather.
Full Output at -15°C
T-CAP guarantee
1 or 3-Phase
Electrical supply
60°C
Max hydraulic output
BUS grant eligible
Panasonic Aquarea monobloc heat pumps are eligible for the UK Boiler Upgrade Scheme grant when installed by an MCS-certified installer in an eligible property.
MCS-certified installer required
To claim the BUS grant and validate full Panasonic manufacturer warranty, this heat pump must be installed and commissioned by an MCS-certified heat pump installer.
Choose your capacity
| Nameplate output |
Electrical supply |
Delivered capacity (A-15°C / W45°C) |
Model code |
Typical property fit |
| 9 kW |
1-phase |
9 kW |
WH-MXC09J3E5 |
3 to 4 bedroom homes needing reliable cold-weather output |
| 12 kW |
1-phase |
12 kW |
WH-MXC12J6E5 |
Larger 4 to 5 bedroom homes |
| 16 kW |
3-phase |
16 kW |
WH-MXC16J9E8 |
Very large detached / light commercial, 3-phase supply properties |
What T-CAP actually means
Most air source heat pumps lose heating capacity as the outside temperature falls — a 9 kW unit at +7°C might only deliver 6–7 kW at -7°C. T-CAP holds the full nameplate output all the way down to -15°C ambient, so the kW you specify is the kW you get on the coldest night of the year — removing the guesswork (and the temptation to oversize) from sizing for UK winter design conditions.
Key features
T-CAP — full capacity to -15°C
Delivers rated nameplate output at -15°C ambient with a 45°C flow temperature — no capacity fade on cold days, unlike standard (non-T-CAP) monobloc units.
Aquarea Smart Control
Built-in Wi-Fi-ready platform via Aquarea Smart Cloud — schedule, monitor and view energy data through the free smartphone app (Wi-Fi adapter sold separately).
R32 refrigerant
Lower GWP than legacy R410A units. Sealed monobloc circuit with no on-site F-Gas brazing at install.
60°C hydraulic output
Reaches 60°C flow temperature — suits a broad range of UK retrofit radiator setups without emitter replacement.
Modulating inverter
DC inverter compressor modulates output continuously across the full range, maintaining efficiency on milder days as well as at the T-CAP design condition.
Single or three-phase
9 and 12 kW available single-phase for typical domestic supplies; 16 kW available three-phase for larger properties or where a three-phase supply already exists.
Platform specification (all variants)
| Range |
Panasonic Aquarea T-CAP Monobloc J Generation |
| Type |
R32 monobloc air source heat pump with T-CAP cold-climate technology |
| Available nameplate capacities |
9 kW / 12 kW / 16 kW |
| Model codes |
WH-MXC09J3E5 (1-phase) / WH-MXC12J6E5 (1-phase) / WH-MXC16J9E8 (3-phase) |
| Refrigerant |
R32 (sealed factory charge) |
| T-CAP rated condition |
Full nameplate capacity delivered at A-15°C / W45°C |
| Maximum hydraulic output temperature |
60°C |
| Electrical supply |
1-phase (9/12 kW) or 3-phase (16 kW), 230/400V, 50Hz |
| Certifications |
MCS certified (EN14511), BUS grant eligible |
| Smart connectivity |
Aquarea Smart Cloud / Comfort Cloud (Wi-Fi adapter sold separately) |
What's in the box (every variant)
- Panasonic Aquarea T-CAP Monobloc J Generation outdoor unit (capacity per selected variant)
- Wired remote controller
- Built-in magnetic water filter, flow meter, automatic air purge valve
- Manufacturer installation and commissioning documentation
What you'll also need (sold separately)
- DHW cylinder (heat-pump-suitable, indirect coil sized for low flow temperature)
- Outdoor wall bracket or floor stand
- Anti-freeze valves on primary flow and return
- Magnetic system filter on the primary return (in addition to the outdoor unit's built-in filter)
- CZ-TAW1C or CZ-TAW2 Wi-Fi adapter for full smartphone app access
Frequently Asked Questions
Which kW should I choose?
Choose the variant that matches your calculated heat loss at your local winter design temperature. As a rough guide: 9 kW for 3–4 bed homes needing reliable cold-weather output; 12 kW for larger 4–5 bed homes; 16 kW for very large or light-commercial properties, or where a 3-phase supply already exists. Because T-CAP holds full capacity down to -15°C, you generally don't need to oversize for cold-weather margin the way you might with a standard monobloc.
What's the difference between T-CAP and the standard J Generation?
The standard J Generation (5/7/9 kW) loses some capacity as it gets colder and the flow temperature needed rises — see our J Generation listing. T-CAP is specifically engineered to hold full rated output all the way to -15°C ambient, making it the better choice for larger properties, higher heat-loss buildings, or anywhere reliable output on the coldest days matters most.
Can I choose 1-phase or 3-phase?
The 9 kW and 12 kW variants are 1-phase only. The 16 kW variant is 3-phase only — check your property's electrical supply before ordering.
Does this need a separate Wi-Fi module?
Yes — the CZ-TAW1C or CZ-TAW2 Wi-Fi adapter is sold separately for full smartphone app access. The unit ships with a standard wired remote controller.
Do I need to be MCS-registered to install this?
The Aquarea can be installed by any competent engineer, but the Boiler Upgrade Scheme grant requires an MCS-certified installer. Quality Heating can introduce you to trade partners if needed.
