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 Gloucestershire cylinder can drain safely to the outside. Many homes in Gloucestershire with combi boilers have no airing cupboard, so the survey looks for the most practical cylinder space. In terraced homes around Gloucestershire and across Gloucestershire, slimline cylinders can fit spaces a standard model cannot.
Who it suits
- Every air-to-water heat pump installation, whatever the existing boiler
- Larger families or homes with two or more bathrooms
- Homes replacing a combi boiler that need space found for a cylinder
- Households with older vented cylinders and loft tanks who want mains-pressure showers
Grants and rules for heat pumps in England
In England the Boiler Upgrade Scheme gives £7,500 towards an air source heat pump (£9,000 if it replaces oil or LPG, from 21 July 2026 to 31 March 2027), and since 28 April 2026 a valid EPC is no longer needed. The grant is applied for by the MCS-certified installer and shown as a deduction on your quote.
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 Gloucestershire
These are guide prices for Gloucestershire, installed and including VAT. Your final price is fixed in a written quote after the survey and depends on the heat loss of the house, the radiators that need changing and where the unit goes.
| 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 Gloucestershire
We cover 12 towns in Gloucestershire 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 |
|---|---|---|---|
| Gloucester | GL1 | Cheltenham | 7 h 46 min |
| Cheltenham | GL50 | Tewkesbury | 7 h 45 min |
| Stroud | GL6 | Dursley | 7 h 47 min |
| Kingswood | BS15 | Mangotsfield | 7 h 50 min |
| Mangotsfield | BS16 | Kingswood | 7 h 50 min |
| Yate | BS37 | Mangotsfield | 7 h 49 min |
| Tewkesbury | GL20 | Cheltenham | 7 h 44 min |
| Cirencester | GL7 | Stroud | 7 h 47 min |
| Dursley | GL11 | Lydney | 7 h 48 min |
| Lydney | GL15 | Dursley | 7 h 47 min |
| Stow-on-the-Wold | GL56 | Chipping Norton | 7 h 45 min |
| Thornbury | BS35 | Yate | 7 h 48 min |
Heat pump hot water cylinders questions
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.
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.