Bosch Compress Review UK (2026)
Quick Answer
German engineering brand behind Worcester Bosch, with the Compress R290 range and strong installer trust.
Data verified April 2026. UK installed pricing varies with installer, site and package.
At a Glance
| Origin | Germany (Bosch Thermotechnology, parent of Worcester Bosch) |
| UK support | Strong, leans on the large Worcester Bosch heating installer base in the UK |
| Capacity / sizing | 4 kW – 12 kW (Compress 5800i AW range) |
| SCOP | 4.5+ at 35°C flow (Compress 5800i AW, A7/W35) |
| Warranty | Up to 7 years via accredited installers |
| Indicative UK price | £9,000–£14,000 installed before BUS grant |
Strengths
- Compress 5800i AW uses R290 with high flow temperatures for older homes
- Backed by the trusted Worcester Bosch heating brand and installer network
- Quiet operation and tidy outdoor unit design
- Strong controls and home heating integration
Weaknesses
- Premium pricing in line with other German brands
- Heat pump range is narrower than its boiler line-up
- Some homeowners conflate it with the separate Worcester Bosch boiler range
Who Bosch Compress Suits Best
Homeowners who trust the Worcester Bosch name and want an R290 unit fitted by a heating installer they already know.
When to Avoid
You want the widest model choice or the lowest price, Samsung and Panasonic come in cheaper.
Popular Models
- Compress 5800i AW (R290, high temp)
- Compress 3400i AWS (split)
- Compress 7400i AW (larger homes)
Frequently Asked Questions
How much does a Bosch heat pump cost in the UK?
Bosch Compress installations typically cost £9,000–£14,000 before the £7,500 Boiler Upgrade Scheme grant, bringing the net cost to roughly £1,500–£6,500.
Is Bosch the same as Worcester Bosch?
They are part of the same group. Worcester Bosch is the well-known UK boiler brand; Bosch's heat pumps use the Compress name and lean on the same trusted installer network.
Does the Bosch Compress 5800i use R290?
Yes. The Compress 5800i AW uses R290 (propane), a natural refrigerant with very low global warming potential that reaches high flow temperatures suited to older UK homes.
Is Bosch eligible for the BUS grant?
Yes. Bosch Compress heat pumps qualify for the £7,500 Boiler Upgrade Scheme grant when installed by an MCS-certified installer in England and Wales.
Compare with Other Heat Pump Brands
| Brand | UK support | Warranty | Indicative price | |
|---|---|---|---|---|
| Vaillant | Strong, large UK installer and service network, significant G.A.S. partnership | 5 years standard; up to 10 years via accredited installer (G.A.S.) | £9,000–£14,000 installed before BUS grant (-£7,500) | View → |
| Daikin | Very strong, large UK office, Daikin Sustainable Home Centre, extensive installer network | 3 years standard; extendable to 7 years via accredited installer | £9,500–£14,500 installed before BUS grant | View → |
| Mitsubishi Ecodan | Very strong, largest installer base of any ASHP brand in the UK | 7 years standard on accredited installs (Mitsubishi Electric Hybrid+ programme) | £9,000–£13,500 installed before BUS grant | View → |
| NIBE | Strong, UK office plus VIP+ installer network (extended warranty programme) | 5 years standard; up to 10 years via VIP+ accredited installer | £10,000–£15,000 installed before BUS grant (air source); significantly more for ground source with boreholes | View → |
| Grant Aerona | Strong in rural UK and off-gas areas, established oil-boiler heritage and installer base | 7 years on the Aerona R290 with registration | £8,500–£13,500 installed before BUS grant (-£7,500) | View → |
| Viessmann Vitocal | Established UK office and trained installer network, strong technical support | 5 years standard; extendable via accredited installers | £9,500–£14,500 installed before BUS grant | View → |
| Panasonic Aquarea | Good UK distribution and installer network, established air conditioning heritage | 5 years standard; up to 7 via accredited installers | £8,500–£13,000 installed before BUS grant | View → |
| Samsung EHS | Growing UK installer network, established air conditioning presence | 5 years standard; up to 7 via accredited installers | £8,000–£12,500 installed before BUS grant | View → |
| LG Therma V | Growing UK network, established HVAC and air conditioning presence | 5 years standard; up to 7 via accredited installers | £8,500–£13,000 installed before BUS grant | View → |
| Aira | Direct Aira-employed installers and aftercare, not a traditional dealer network | Long warranty and performance guarantee as part of the Aira package | Upfront from around £6,500 net after grant, or a monthly subscription | View → |
| Ideal Heating | Strong UK manufacturing base and a large existing boiler installer network | Up to 7 years via accredited installers | £8,500–£13,000 installed before BUS grant | View → |
| Midea | Growing UK distribution; Midea also manufactures units badged by other brands | 5 years standard; extendable via accredited installers | £7,500–£12,000 installed before BUS grant | View → |
Get a Quote Including Bosch Compress
Most MCS-certified installers carry multiple heat pump brands — ask for a quote specifying Bosch Compress if you want a heat pump from this brand. Use the form below to reach local installers.
Sources
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He researches every battery and inverter brand against manufacturer datasheets, MCS and Ofgem data, and feedback from the MCS-certified installers in our directory before publishing.