Worcester Bosch Compress 7001i AW
Worcester Bosch's mid-range UK monobloc ASHP. Five capacities (5–17 kW), A+++ at 35°C, Quiet Mark, up to 12-yr warranty via Accredited Installers.
4.1 / 5
Highly recommended
Strengths
- Five capacity variants from 5 kW to 17 kW including three-phase — broadest UK range from a single mid-premium brand, so installer can right-size without forcing 7 kW onto a small property
- A+++ energy class at 35°C flow with COP up to 5.31 at A7/W35 on the 7 OR-S — competitive headline efficiency for a mass-market UK product line
- Quiet Mark certified across the range; 39–47 dB(A) sound pressure at 1 m suits semi-detached and terraced properties where boundary noise complaints are a real install risk
Watch outs
- Standard warranty without an Accredited Installer is only 2 years — the extended cover is conditional on installer choice, not on the product itself
- Refrigerant inconsistency across the range: some current single-phase variants use R32 (GWP 675) while marketing materials reference R290 (GWP 3); installers report needing to confirm refrigerant on the specific batch at quote stage
- Pre-grant installed price typically £8,000–£15,000 — mid-premium, and the 7–12-year warranty advantage only materialises with a Worcester Accredited Installer (which can narrow installer choice and pricing competition in some regions)
£8,000
Typical price — check Heatable (Worcester Accredited Installer) for live pricing.
- Range CS7001i AW 5 / 7 / 9 / 13 OR-S (single-phase); CS7001i AW 17 OR-T (three-phase)
- Heating capacity (A2/W35) 5.32 kW – 13.07 kW depending on variant (17 OR-T: 11.71 kW)
- COP at A7/W35 4.68 – 5.31 depending on capacity
- Energy class at 35°C / 55°C flow A+++ / A++ under ErP 811/2013
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By Editorial team2 min read
- Range
- CS7001i AW 5 / 7 / 9 / 13 OR-S (single-phase); CS7001i AW 17 OR-T (three-phase)
- Heating capacity (A2/W35)
- 5.32 kW – 13.07 kW depending on variant (17 OR-T: 11.71 kW)
- COP at A7/W35
- 4.68 – 5.31 depending on capacity
- Energy class at 35°C / 55°C flow
- A+++ / A++ under ErP 811/2013
- Maximum flow temperature
- 62°C
- Sound pressure at 1 m
- 39 – 47 dB(A)
- Sound power outdoors
- 47 – 55 dB(A) (Quiet Mark certified)
- Refrigerant
- R32 in current single-phase stock; range transitioning toward R290 — confirm batch at quote stage
- Compatible cylinder
- Greenstore WB Range heat pump cylinder
- Smart control
- Worcester EasyControl thermostat range
- MCS approval
- Listed under Bosch Thermotechnology — required for BUS grant claims