A heat pump hot water cylinder is an insulated tank that stores hot water heated by the heat pump, with a much larger internal coil than a cylinder designed for a boiler. Heat pumps heat water to a lower temperature than boilers, typically around 45–55°C, so a bigger coil is needed to pass heat into the stored water quickly. A standard boiler cylinder would heat slowly and make the heat pump work harder than it should.
Cylinder sizes for Berkshire homes are based on the people living there and the bathrooms in daily use. In terraced homes around Berkshire and across Berkshire, slimline cylinders can fit spaces a standard model cannot. Many homes in Berkshire with combi boilers have no airing cupboard, so the survey looks for the most practical cylinder space.
Who it suits
- Every air-to-water heat pump installation, whatever the existing boiler
- Homes with solar PV that want to store daytime electricity as hot water
- Households with older vented cylinders and loft tanks who want mains-pressure showers
- Homes replacing a combi boiler that need space found for a cylinder
Grants and rules for heat pumps in England
Homes in Berkshire can use the Boiler Upgrade Scheme, which takes £7,500 off the cost of an air source heat pump when it replaces fossil-fuel or electric heating. Replacing oil or LPG heating qualifies for £9,000 for installations from 21 July 2026 to 31 March 2027, and air-to-air systems for £2,500. The MCS-certified installer named in your quote applies for the grant and deducts it from the price.
Installing heat pumps is zero-rated for VAT across the UK until 31 March 2027. Since 29 May 2025, permitted development in England allows up to two air source heat pumps on a house, each up to 1.5 m³, with no blanket 1 m boundary rule — the installation must still meet the MCS planning standards, including the noise check. Listed buildings, flats and some conservation-area positions need extra consent, which we check at survey.
Heat pump hot water cylinders prices in Berkshire
Here are typical prices for heat pump hot water cylinders in Berkshire, installed and including VAT. Use the guide price tool for a figure based on your home, then a survey confirms it in writing.
| Work | Guide price |
|---|---|
| Heat pump hot water cylinder (supplied and fitted) | £1,250–£2,350 |
Supplied and fitted, inc VAT. Included in every full system price.
Towns we cover in Berkshire
We cover 10 towns in Berkshire for heat pump hot water cylinders. Each links to local guide prices and the grant position for England.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Reading | RG1 | Lower Earley | 7 h 50 min |
| Slough | SL1 | Maidenhead | 7 h 49 min |
| Bracknell | RG12 | Crowthorne | 7 h 50 min |
| Maidenhead | SL6 | Slough | 7 h 49 min |
| Wokingham | RG40 | Crowthorne | 7 h 50 min |
| Newbury | RG14 | Thatcham | 7 h 51 min |
| Lower Earley | RG6 | Reading | 7 h 50 min |
| Crowthorne | RG45 | Sandhurst | 7 h 51 min |
| Thatcham | RG19 | Newbury | 7 h 51 min |
| Sandhurst | GU47 | Crowthorne | 7 h 51 min |
Heat pump hot water cylinders questions
How much does a heat pump cylinder cost?
A heat pump hot water cylinder has a guide price of £1,200–£2,200, installed and including VAT. In a full heat pump installation the cylinder is already included in the system guide price, so this figure mainly applies where a cylinder is replaced on its own. Capacity, coil design and the pipework needed affect where your price sits.
Do I need good water pressure for an unvented cylinder?
Yes. An unvented cylinder runs at mains pressure, so it needs enough incoming pressure and flow to supply your taps and showers well. We measure your mains supply at the survey. If flow is low, options include a different cylinder type or an upgrade to the incoming supply pipe, which we explain before you commit.
Will I run out of hot water with a heat pump?
Not if the cylinder is sized to how your household uses hot water. Unlike a combi, hot water is stored, so very heavy use, such as several long showers back to back, can use up the stored volume before it reheats. Sizing for your busiest period, and timing reheats sensibly, avoids this for most homes.
Can I keep my existing hot water cylinder with a heat pump?
Usually not. Cylinders designed for boilers have a small coil that cannot transfer heat quickly at heat pump temperatures, so the water would reheat slowly and efficiency would suffer. A heat pump cylinder has a much larger coil. The new cylinder can often go in the same cupboard, though, if there is enough height and floor space.