Most heat pump cylinders are unvented, meaning they run at mains water pressure and give strong flow from every tap without a cold water tank in the loft. Unvented cylinders have safety controls that must be fitted and checked by someone qualified to work on them. We size the cylinder from your household and bathrooms, confirm your mains water supply can support it, and plan the space, pipework and discharge route at the survey.
Discharge pipe routes are planned at the survey so a Suffolk cylinder can drain safely to the outside. Many homes in Suffolk with combi boilers have no airing cupboard, so the survey looks for the most practical cylinder space. In terraced homes around Suffolk and across Suffolk, slimline cylinders can fit spaces a standard model cannot.
Who it suits
- Every air-to-water heat pump installation, whatever the existing boiler
- Households with older vented cylinders and loft tanks who want mains-pressure showers
- Larger families or homes with two or more bathrooms
- Homes with solar PV that want to store daytime electricity as hot water
Grants and rules for heat pumps in England
Homes in Suffolk 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.
There is no VAT on installing a heat pump anywhere in the UK until 31 March 2027. In England most houses can have an air source heat pump under permitted development, provided the unit meets the MCS noise and siting standards; the old 1 m boundary limit was removed on 29 May 2025. We flag listed buildings, flats and sensitive conservation-area positions at survey.
Heat pump hot water cylinders prices in Suffolk
Here are typical prices for heat pump hot water cylinders in Suffolk, 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) | £1,200–£2,200 |
Supplied and fitted, inc VAT. Included in every full system price.
Towns we cover in Suffolk
We cover 11 towns in Suffolk 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 |
|---|---|---|---|
| Ipswich | IP1 | Woodbridge | 7 h 44 min |
| Lowestoft | NR32 | Beccles | 7 h 39 min |
| Bury St Edmunds | IP33 | Stowmarket | 7 h 42 min |
| Haverhill | CB9 | Newmarket | 7 h 44 min |
| Felixstowe | IP11 | Harwich | 7 h 45 min |
| Sudbury | CO10 | Halstead | 7 h 44 min |
| Stowmarket | IP14 | Ipswich | 7 h 42 min |
| Newmarket | CB8 | Haverhill | 7 h 42 min |
| Beccles | NR34 | Lowestoft | 7 h 40 min |
| Southwold | IP18 | Beccles | 7 h 41 min |
| Woodbridge | IP12 | Ipswich | 7 h 43 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.
Does a heat pump cylinder need servicing?
Yes. An unvented cylinder's safety devices should be checked every year, including the relief valves, the expansion vessel charge and the discharge pipework. This is normally done as part of the annual heat pump service, and it is often a condition of the cylinder manufacturer's warranty. Keep the cylinder paperwork with your heat pump handover documents.
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.
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.