Technology
Two indoor units, one quiet condenser, and a great deal of engineering you'll never have to think about. This page is for the people who like to look anyway.
The wall unit
Cool air leaves through 2,430 micro-holes across a completely flat fascia, so it arrives as a drift rather than a draught. A soft-air mode diffuses it further still, and in heating the anti-cold-air logic holds the fan back until the coil is warm — no chilly gust while it wakes up.
The full feature set, as specified — not the highlights reel.
The floor unit
The strongest heater in the range and the quietest unit we fit, in the radiator position. Here's the engineering inside it.
The same engineering discipline, at skirting level.
The outdoor unit
This is the picture that explains our entire approach. Ordinary installers bolt one outdoor box on the wall per room. We fit a single condenser, and every room in the house runs from it.
Built for January
The condensers we specify keep heating at outdoor temperatures down to −25°C — colder than London has ever recorded, and comfortably beyond anything a January cold snap can throw at them. Around four units of heat for every unit of electricity, all season.
The box you'll never look at, engineered hardest of all.
Self-care
Between services, the system quietly maintains itself. The indoor coil freezes, thaws and flushes its own gold-coated fins clean, then dries itself to stop anything growing. UV sterilisation and a stack of washable filters deal with what's in the air rather than just its temperature — and if anything ever does go wrong, the unit diagnoses itself and tells our engineers in plain English.
Control
A handset whose i-Feel sensor reads the temperature at your armchair, not at the ceiling. And Wi-Fi in every unit from day one.
Data sheets
No brochure gloss — the working numbers our engineers design against, from the manufacturer's laboratory data and the independent test reports. Full data sheets and certificates are available on request.
| The wall unit · our standard fit | |
|---|---|
| Cooling capacity (range) | 3.50 kW (0.65–4.10) |
| Heating capacity (range) | 4.20 kW (0.93–4.20) |
| Sound pressure, high / mid / night | 42 / 37 / 35 dB(A) |
| Airflow | 650 m³/h |
| Dimensions W × H × D | 827 × 299 × 201 mm |
| Weight | 8.5 kg |
| Fan power | 45 W |
One wall unit, one size — it glides between 0.65 and 4.1 kW, so the same unit suits a box room and a principal bedroom alike. Where even its case is too big, the compact below steps in. Larger sizes are available by special order.
| F 28 | F 36 | F 53 | |
|---|---|---|---|
| Cooling capacity (range) | 2.80 kW (1.50–3.55) | 3.60 kW (1.70–3.70) | 5.30 kW (2.50–5.60) |
| Heating capacity (range) | 3.00 kW (1.60–3.81) | 3.90 kW (2.03–4.42) | 5.80 kW (3.03–7.03) |
| Sound pressure, high / mid / night | 40 / 34 / 31 dB(A) | 40 / 34 / 31 dB(A) | 42 / 35 / 33 dB(A) |
| Airflow, high / mid / low | 840 / 700 / 580 m³/h | 840 / 700 / 580 m³/h | 900 / 720 / 600 m³/h |
| Dimensions W × H × D | 1000 × 690 × 235 mm | 1000 × 690 × 235 mm | 1000 × 690 × 235 mm |
| Weight | 27.0 kg | 27.0 kg | 28.0 kg |
| Mounting | Floor or ceiling | Floor or ceiling | Floor or ceiling |
| Compact wall unit | Compact floor console | |
|---|---|---|
| Cooling capacity | 2.05–2.60 kW | 2.60–4.70 kW |
| Heating capacity | 2.15–2.93 kW | 2.80–5.00 kW |
| Sound pressure | 40 / 37 / 34 dB(A) | 45 / 39 / 36 dB(A) |
| Dimensions W × H × D | 708 × 282 × 193 mm | 720 × 610 × 230 mm |
| Weight | 7.0 kg | 15–16 kg |
| Best for | Box rooms, tiny studies — the smallest wall case in the family | Radiator-sized rooms where the metre-wide floor unit won't fit |
Both compacts run on the same condensers as the rest of the range, mixed freely with the standard units — specified at your design visit when a room calls for them.
| 2-room · Pro | 4-room · Pro | 4-room · large | 5-room | |
|---|---|---|---|---|
| Indoor units served | 2 | Up to 4 | Up to 4 | Up to 5 |
| Cooling capacity (range) | 5.2 kW (2.0–5.8) | 8.0 kW (2.5–9.8) | 10.6 kW (2.5–11.0) | 12.0 kW (2.8–12.7) |
| Heating capacity (range) | 6.0 kW (2.2–6.6) | 9.4 kW (2.7–10.1) | 11.0 kW (2.7–11.2) | 13.0 kW (3.0–13.1) |
| Cooling efficiency (SEER · class) | 8.50 · A+++ | 7.80 · A++ | 6.50 · A++ | 6.20 · A++ |
| Heating efficiency (SCOP · class) | 4.70 · A++ | 4.72 · A++ (5.12 measured) | 4.09 · A+ | 4.00 · A+ |
| Sound pressure / power | 54 / 65 dB(A) | 59 / 67 dB(A) | 60 / 70 dB(A) | 61 / 70 dB(A) |
| Dimensions W × H × D | 900 × 700 × 360 mm | 970 × 803 × 395 mm | 970 × 803 × 395 mm | 970 × 803 × 395 mm |
| Weight | 42 kg | 59 kg | 63.5 kg | 75 kg |
| Heating operating range | To −25°C | To −25°C | To −25°C | To −15°C |
| Max pipe run, total / per room | 40 / 25 m | 80 / 35 m | 80 / 35 m | 80 / 35 m |
| Compressor | GMCC rotary, DC inverter | GMCC rotary, DC inverter | GMCC rotary, DC inverter | GMCC rotary, DC inverter |
Capacities to EN 14825 rating conditions; ranges show inverter modulation. Sound pressure measured at 1 m. Indoor units connect to any outdoor unit above, wall and floor mixed freely; maximum height difference indoor-to-outdoor 15 m. Refrigerant R32 (GWP 675) throughout. Energy performance verified by SGS laboratory testing under Regulation (EU) 206/2012; safety to EN IEC 60335-2-40. Specifications are refined as our manufacturing programme completes; final figures for your house are confirmed on your quotation.
The numbers
Every figure below comes from independent laboratory testing to the European energy-performance standard — not from our marketing department.
The flagship. SEER 8.5 in cooling — the top of the European scale — with A++ heating and −25°C capability.
Measured heating efficiency above 5 — five units of heat per unit of electricity on test — with −25°C capability.
Low-impact refrigerant (GWP 675), DC inverter compressors, and EU energy-performance testing to EN 14825.
Specifications relate to the current certified range and are refined as our manufacturing programme completes; final figures for your house are confirmed on your quotation.
Bring us a floor plan or just an address — we'll specify every unit, room by room, and explain why.