Worcester Bosch In Brief:
Worcester Bosch heat pumps are recognised as reliable and durable, and the range comprises different models which are suitable for all kinds of different property types. Various government grants of up to £7,500 are available to help with the cost of purchase and installation for households looking to move away from fossil fuel heating like gas boilers. The basic warranty offered is two years, but users can purchase an extended warranty and service contract.
Worcester Bosch Heat Pump Specifications
CS7001i AW Outdoor Unit and Indoor Unit
This is the quietest heat pump offered: the Bosch 7400i AW air-to-water heat pump is perfectly suited for both new builds and complete home renovations. This split unit heat pump utilises high-efficiency, low-carbon home heating technology to deliver green energy suitable for home heating and hot water.
There are two suitable heat pump size models in this range, rated at 5kW and 7kW, under average climate conditions.
- Harnesses outside air temperature to deliver renewable heating and hot water
- Extremely quiet in operation with Quiet Mark certified
- Potentially eligible for £7,500 government grant
- Reduces fuel bills and a home’s carbon footprint
- Suitable for all home sizes including use in urban areas
- Doesn’t require any pipework in the ground
- Low maintenance
Technical details:
- CS7001i AW-5kW
| Energy Efficiency Class (35°C) | A+++ |
| Energy Efficiency Class (55°C) | A++ |
| Water Heating Efficiency Class | N/A |
| Water Heating Declared Load Profile | N/A |
| Heating Power at A2 / W35 | 5.32 |
| Coefficient of Performance (COP) at +7 / W35 | 4.69 |
| Sound pressure level at a distance of 1 m dB(A) | 39 |
| Sound Power Level Outdoors (dBA) | 47 |
- CS7001i AW-7kW
| Energy Efficiency Class (35°C) | A+++ |
| Energy Efficiency Class (55°C) | A++ |
| Water Heating Efficiency Class | N/A |
| Water Heating Declared Load Profile | N/A |
| Heating Power at A2 / W35 | 6.26 |
| Coefficient of Performance (COP) at +7 / W35 | 5.31 |
| Sound pressure level at a distance of 1 m dB(A) | 39 |
| Sound Power Level Outdoors (dBA) | 47 |
- CS7001i AW-9kW
| Energy Efficiency Class (35°C) | A+++ |
| Energy Efficiency Class (55°C) | A++ |
| Water Heating Efficiency Class | N/A |
| Water Heating Declared Load Profile | N/A |
| Heating Power at A2 / W35 | 8.95 |
| Coefficient of Performance (COP) at +7 / W35 | 5.02 |
| Sound pressure level at a distance of 1 m dB(A) | 40 |
| Sound Power Level Outdoors (dBA) | 48 |
- CS7001i AW-13kW
| Energy Efficiency Class (35°C) | A+++ |
| Energy Efficiency Class (55°C) | A++ |
| Water Heating Efficiency Class | N/A |
| Water Heating Declared Load Profile | N/A |
| Heating Power at A2 / W35 | 13.07 |
| Coefficient of Performance (COP) at +7 / W35 | 4.68 |
| Sound pressure level at a distance of 1 m dB(A) | 47 |
| Sound Power Level Outdoors (dBA) | 55 |
- CS7001i AW-17kW
| Energy Efficiency Class (35°C) | A+++ |
| Energy Efficiency Class (55°C) | A++ |
| Water Heating Efficiency Class | N/A |
| Water Heating Declared Load Profile | N/A |
| Heating Power at A2 / W35 | 11.71 |
| Coefficient of Performance (COP) at +7 / W35 | 5 |
| Sound pressure level at a distance of 1 m dB(A) | 45 |
| Sound Power Level Outdoors (dBA) | 53 |
CS7400i AW Outdoor Unit and Indoor Unit
This is the quietest heat pump offered: the Bosch 7400i AW air-to-water heat pump is perfectly suited for both new builds and complete home renovations. This split unit heat pump utilises high-efficiency, low-carbon home heating technology to deliver green energy suitable for home heating and hot water.
There are two models in this range, rated at 5kW and 7kW, under average climate conditions.
- Harnesses outside air temperature to deliver renewable heating and hot water
- Extremely quiet in operation with Quiet Mark certified
- Eligible for £7,500 government grant
- Reduces fuel bills and a home’s carbon footprint
- Suitable for all home sizes including use in urban areas
- Doesn’t require any pipework in the ground
- Low maintenance
Technical details:
- CS7400i AW-5kW
| Energy Efficiency Class (35°C) | A+++ |
| Energy Efficiency Class (55°C) | A++ |
| Water Heating Efficiency Class | N/A |
| Water Heating Declared Load Profile | N/A |
| Heating Power at A2 / W35 | 5.48 |
| Coefficient of Performance (COP) at +7 / W35 | 5.01 |
| Sound pressure level at a distance of 1 m dB(A) | 42 |
| Sound Power Level Outdoors (dBA) | 50 |
- CS7400i AW-7kW
| Energy Efficiency Class (35°C) | A+++ |
| Energy Efficiency Class (55°C) | A++ |
| Water Heating Efficiency Class | N/A |
| Water Heating Declared Load Profile | N/A |
| Heating Power at A2 / W35 | 7.29 |
| Coefficient of Performance (COP) at +7 / W35 | 5.01 |
| Sound pressure level at a distance of 1 m dB(A) | 42 |
| Sound Power Level Outdoors (dBA) | 50 |
Like all split units, it requires indoor space, but if you are replacing an existing boiler then it should be reasonably simple to put the indoor module in that space. However, if you are adding a heat pump to your existing boiler – the “belt-and-braces” approach to ensure that there is backup heating in all circumstances, then sufficient space will need to be available to mount the unit.
Note that the latest research from Oxford University, in collaboration with the Regulatory Assistance Project think-tank shows that heat pumps outperform conventional heating in cold climates, confounding criticisms that heat pumps are inadequate in subzero conditions. So there is a case for completely replacing an existing boiler, rather than having both units working in tandem.
Bosch Compress Hybrid 7000i AW
This is the conservative approach to home heating: the Hybrid 7000i AW heat pump delivers low carbon heat, supported by all the benefits and back-up of a gas combi boiler for all year-round comfort. It ensures peace of mind for people who are concerned about the reliability of heat pumps, particularly in low temperatures. It should be noted that heat pumps have fewer moving parts than conventional boilers so there is less to go wrong with them.
Like the rest of the Bosch range, these hybrid heat pumps are suitable for new build homes and can also be retrofitted into existing residences.
The control system is automatic, so, depending on both the outdoor air temperature and the room heating requirements, the heater will use either the heat pump or the boiler, or sometimes the two together.
The Hybrid 7000iAW is compatible with Bosch’s 5kW, 7kW and 9kW air-to-water heat pumps. The advantage of this model is that it delivers cost and carbon emissions immediately while being easy to install and interface with existing pipes and radiators.
The hybrid unit is installed between the outdoor heat pump and an existing boiler and optimises the home heating operation.
- Quiet Mark approved
- Sound levels similar to a modern fridge
- No need for hot water storage
- Bosch’s renowned design and build quality
- Suitable for all home sizes
- Doesn’t require any pipework in the ground
- Low maintenance
Technical details:
| Colour | White |
| Width (mm) | 350 |
| Height (mm) | 706 |
| Depth (mm) | 246 |
| Weight (kg) | N/A |
| Rated Airflow | N/A |
| Sound Power Level db(A) | 36 |
| Sound Pressure Level | N/A |
Worcester Bosch Heat Pump Pros and Cons
Pros
- Great brand reputation
- High energy efficiency rating
- Durable and reliable
- Quiet in operation
- Stylish looks
Cons
- Costly compared to some competitors
- Short duration warranty (only 2 years)
- Can be tricky to fit in some older homes
- Lower maximum flow temperatures with some models
Worcester Bosch Company Overview:
The Bosch Group is a leading global supplier of technology products and services, including heating, air-conditioning and household appliances. It employs over 400,000 staff worldwide and in 2024 generated sales of 90.3 billion euros. Its operations are divided into four business sectors: Mobility, Industrial Technology, Consumer Goods, and Energy and Building Technology.
The British subsidiary Worcester Bosch — formed when British boiler and heating appliance company Worcester joined forces with Bosch in 1996 — sells conventional boilers and air conditioning units, as well as renewable power sources like solar panels and heat pumps.
Worcester Bosch Heat Pump FAQs
Do Worcester Bosch heat pumps work in the winter?
A: Worcester Bosch air source heat pumps are very capable of heating homes and delivering hot water even in very cold conditions, and certainly in the British winter. While, like any other brand of heat pump, they do have to work that bit harder to extract sufficient heat, and therefore require more electricity to run, they do still continue to function in subzero temperatures.
What’s a hybrid heat pump system?
A: This is a system where the heat pump is installed in parallel with an existing boiler, and the control unit swaps between them depending on the heating requirements. This is a judicious approach, where the user can have “the best of both worlds” when their heating demand might mean a heat pump alone would be insufficient for their needs
Are tax incentives or grants available for Worcester Bosch air pumps?
A: VAT was removed from heat pump installations in April 2022. The 0% VAT level applies to the installation itself and any associated works.
The Boiler Upgrade Scheme grant provides up to £7,500 in free funding to significantly reduce upfront costs for replacing boilers with air source and ground source heat pumps.
Can I keep my existing radiators with a Worcester Bosch heat pump?
A: In some circumstances, it may be possible for qualified heat pump installers to utilise your existing pipework and radiators with a Worcester Bosch heat heat pump system, especially if using a high temperature heat pump. Where this is not possible, underfloor heating may be an option or you may have to install oversized radiators to ensure sufficient heat delivery from a the heating system.
Is it possible to retrofit Worcester Bosch heat pumps into older homes?
A: Most manufacturers would say yes to this question though recently Bosch has outlined potential issues, for example, regarding the availability of sufficient space and lack of effective insulation in older British properties: so a careful assessment of practicability is necessary before pressing ahead with a heat pump installation in some residences.
Worcester Bosch Heat Pump Summary
Worcester Bosch air-to-water heat pumps not only look stylish in their design and operation, but they have also received Quiet Mark accreditation. Noise is a significant factor in consumer approval and these quiet units will satisfy discerning users.
Worcester Bosch offers heat pumps with high energy efficiency ratings and these are generally reliable in operation, but the short warranty, compared to other heat pump brands, is a concern for some. It is possible for customers to extend this to seven years for better peace of mind.
The Worcester Bosch brand name is a big plus point and marks them out as a leader in the UK heating space. Their heat pumps have received a good deal of positive feedback, so together with the reasonable installation cost price, this makes them a prime choice for customers looking for a green heating solution that will help them switch from traditional heating methods and embrace renewable energy to reduce energy bills.
