aroTHERM plus 7 kW
Vaillant's R290 monobloc; the unit most MCS installers will quote first for a well-insulated 3-bed. Quiet, high-flow-temperature capable, made in Germany.
- SCOP (35°C)
- 5.05
- Running cost
- £1,180/yr
- Installed
- £11,000–£14,000 installed (before £7,500 BUS grant)
Editorial render. Not a manufacturer photograph; we do not redistribute press imagery without a licence.
Primary question · Is this the safe default heat pump for a typical UK 3-bed?
A well-insulated 1970s–2000s 3-bed semi or detached where the radiators have some headroom for upsizing.
£11,000–£14,000 installed (before £7,500 BUS grant)
- Genuinely quiet at low load
- R290; future-proof refrigerant
- Wide installer base
- Hits 55°C flow without falling off a cliff
- Premium pricing
- Controls UI is more 'engineer' than 'consumer'
Open the cost planner to estimate your installed price.
Key specifications
- Output
- 7 kW @ A7/W35
- SCOP (35°C)
- 5.05
- SCOP (55°C)
- 3.75
- Sound at 1 m
- 31 dB(A) min
- Refrigerant
- R290 (propane)
- , Genuinely quiet at low load
- , R290; future-proof refrigerant
- , Wide installer base
- , Hits 55°C flow without falling off a cliff
- , Premium pricing
- , Controls UI is more 'engineer' than 'consumer'
Mitsubishi Electric★★★★★Ecodan PUZ-WM85- SCOP (35°C)
- 4.55
- Running cost
- £1,290/yr
Service-network depthConservative retrofitsReliability-first buyersReadHouse Verdict8.6/10
Daikin★★★★★Altherma 3 H HT R290 (6 kW)- SCOP (35°C)
- 4.85
- Running cost
- £1,380/yr
Solid-wall VictoriansEdwardian terracesHigh-flow retrofitsReadHouse Verdict8.7/10
If your brief matches "a well-insulated 1970s–2000s 3-bed semi or detached where the radiators have some headroom for upsizing.", the aroTHERM plus 7 kW is a confident pick. If it doesn't, the alternatives above are more honest answers.
Estimate your installed cost
The planner uses your specific home; not a brochure number.