Not every replacement is about age. Some heat pumps were sized by rule of thumb, paired with radiators that are too small or set up without weather compensation, leaving homes cold or bills high. Replacing the unit alone will not fix those problems, so we start with a fresh heat loss survey and check the radiators, pipework, cylinder and controls.
Some of the earlier heat pumps in the Isle of Wight are now reaching the age where replacement is worth considering. We replace heat pumps in the Isle of Wight whoever fitted the original system, including monobloc and split units. New outdoor units in the Isle of Wight may differ in size from the old one, so the base and position are checked at survey.
Who it suits
- Systems that were undersized and struggle in cold weather
- Oversized systems that short cycle and cost more to run than expected
- Older units where parts are becoming hard to source
- Units that have failed with a major fault, such as a compressor failure
Grants and rules for heat pumps in England
Homes in the Isle of Wight 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.
Heat pump replacement prices in the Isle of Wight
These are guide prices including VAT. The rate for your visit in the Isle of Wight is confirmed before we book it, and any repair is priced in writing before parts are ordered.
| Work | Installed guide price |
|---|---|
| Replacing an old outdoor unit like-for-like | £6,350–£10,050 |
| Full system replacement, 2–3 bedroom terrace or semi | £11,150–£14,300 |
| Full system replacement, 3 bedroom semi or small detached | £12,700–£16,450 |
| Full system replacement, 4 bedroom detached | £14,850–£19,100 |
Installed, inc VAT. Grant funding rarely applies to replacing a heat pump, so these prices are shown without any deduction; we check eligibility at survey.
Towns we cover in the Isle of Wight
We cover 6 towns in the Isle of Wight for heat pump replacement. Each links to local guide prices and the grant position for England.
| Town | Postcode district | Nearest town | Midwinter daylight |
|---|---|---|---|
| Newport (Isle of Wight) | PO30 | Cowes | 7 h 57 min |
| Ryde | PO33 | Sandown | 7 h 57 min |
| Cowes | PO31 | Newport (Isle of Wight) | 7 h 57 min |
| Sandown | PO36 | Shanklin | 7 h 58 min |
| Shanklin | PO37 | Sandown | 7 h 58 min |
| Ventnor | PO38 | Shanklin | 7 h 59 min |
Heat pump replacement questions
Can I get a grant to replace my heat pump?
Usually not. In England and Wales, the Boiler Upgrade Scheme cannot normally fund a home that has already been funded for a heat pump, and it is aimed at replacing fossil-fuel or electric heating. Your circumstances may differ, so we check eligibility before quoting. In Scotland, check Home Energy Scotland's criteria. Northern Ireland has no dedicated grant at present.
How long does an air source heat pump last?
Air source heat pumps typically last 15–20 years, depending on the quality of the original design, how hard the unit has worked, where it is sited and how well it has been serviced. Units that short cycle or run at high flow temperatures for years may wear sooner. Annual servicing helps components last and spots problems early.
Can I replace just the outdoor unit?
Often, yes, if the rest of the system is sound and correctly designed. The cylinder, controls and radiators can stay where they are compatible with the new unit. Some older cylinders and controllers do not work with a new heat pump, and the survey checks this. If the original design was the problem, replacing only the unit will not fix it.
Will a new heat pump fit where the old one was?
Sometimes. A new unit may be a different size, weight or shape and may have different clearance requirements, so the existing base and position are checked at survey. The MCS noise assessment is carried out for the new unit, and a different position may be suggested if it improves performance or reduces sound at neighbouring windows.