Air source heat pump assessment and installation based on heat loss, emitter sizing and how the whole home needs to operate.
What you can expect from Infinite
Heat pumps reward good design. Infinite approaches them as a whole-house heating project rather than simply replacing the heat source, with particular attention to emitters, flow temperature and hot-water demand.
- Property and heating-system assessment
- Heat-loss and design-temperature considerations
- Radiator or underfloor-heating suitability review
- Hot-water cylinder and storage planning
- Flow-temperature and control strategy
- Outdoor-unit siting considerations
- Commissioning, handover and ongoing system care
Heat pump grants in 2026
The Boiler Upgrade Scheme currently offers support towards eligible low-carbon heating installations in England and Wales. For eligible air-to-water heat pumps the standard grant is £7,500, with £9,000 available until 31 March 2027 for qualifying off-gas-grid properties replacing oil or LPG heating.
Grant eligibility needs to be checked before you commit.
Some heat-pump projects may qualify for the Boiler Upgrade Scheme. Eligibility and the route for a funded installation depend on the current scheme rules and the property itself. If grant funding matters to you, mention it at enquiry stage and we’ll confirm the right route before any work is agreed.
Heat pump or boiler: which route suits the property?
When this service is worth considering
You are planning a major renovation
Renovation is often the ideal time to improve insulation, emitters and pipework alongside a low-temperature heating design.
You want to move away from fossil-fuel heating
A heat pump can be an effective option where the building and emitters are designed to work at suitable flow temperatures.
Your existing boiler is nearing replacement
Before automatically replacing like-for-like, it can be worth assessing whether a heat pump is realistic for the property.
You are improving the whole heating system
Larger radiators, underfloor heating, zoning and cylinder upgrades can all be coordinated around a new heat-source strategy.
We look beyond the obvious symptom
Plumbing and heating systems are connected. A problem that looks like one failed component can sometimes be caused by circulation, water quality, controls, system pressure, pipework or the way the property has changed over time. That is why our engineers aim to understand the wider context rather than jump straight to a replacement part.
Where there is more than one sensible solution, we explain the options in plain English. That might mean repair versus replacement, a simple like-for-like approach versus a wider upgrade, or work that can sensibly be phased rather than done all at once.
Qualified local expertise
Infinite is a family-run plumbing and heating business based in Lindfield, Haywards Heath with more than 30 years of trade experience. Gas work is carried out by appropriately qualified Gas Safe registered engineers, the team includes G3 unvented-system training, and there is specialist experience with Vaillant heating products.
How the process works
Initial suitability conversation
Give us the key details so we can judge the right type of appointment.
Detailed survey and heat-loss/design assessment
We inspect the relevant appliance, system or property conditions before deciding what is required.
System specification and quotation
You receive a clear explanation of the recommendation, scope and next step.
Installation, commissioning and user handover
Work is completed carefully, tested and handed over with any ongoing care explained.
Local air source heat pumps across Mid Sussex
We are based in Lindfield, Haywards Heath, and regularly work in Lindfield, Cuckfield, Newick, Henfield, Heathfield and Burgess Hill, with selected work in Brighton and nearby areas. For planned jobs, send your postcode with the enquiry and we can confirm coverage and the right appointment type.
Air source heat pumps in your area
Our heat-pump content is supported by dedicated local pages for the areas we most want to serve, so homeowners can find advice relevant to their location rather than a generic Sussex-wide page.
Talk to Infinite about air source heat pumps
Send your postcode and a short description of what you need, or call 07765 006759. The more useful detail you can provide at the start, the easier it is for us to plan the right next step.
Air Source Heat Pumps FAQs
Will a heat pump work in an older Sussex home?
Potentially, yes. Age alone does not decide suitability. Heat loss, insulation, radiator sizes, pipework, available outdoor space and the desired flow temperature all matter.
Do all radiators need replacing?
Not necessarily. Existing emitters should be checked against the heat loss of each room and the intended system temperatures.
Will I still have a hot-water cylinder?
Many air source heat pump systems use a suitably specified hot-water cylinder. The exact arrangement depends on the property and household demand.
Are heat pumps noisy?
Modern units are designed to meet noise requirements, but siting still matters. We consider the outdoor location and neighbouring property as part of the design.
Should I improve insulation first?
Reducing avoidable heat loss can improve any heating system. The survey helps identify whether fabric improvements would materially help the heat-pump design.
How much does an air source heat pump installation cost?
There is no responsible fixed price without understanding the property. Cost depends on heat loss, heat-pump size, cylinder requirements, electrical work, radiator or pipework changes and the condition of the existing heating system. Start with the 2-minute assessment and we can advise on the right survey.
Can I get a Boiler Upgrade Scheme grant?
Some eligible projects may qualify for the Boiler Upgrade Scheme. Grant values and eligibility can change, so if funding is important to your decision, mention it early and we’ll confirm the right route before you commit.
Do heat pumps work with existing radiators?
Often, yes. Each room needs enough emitter output at the intended lower flow temperature, so some radiators may be suitable as they are while others may benefit from upgrading.