Is My Home Suitable for an Air Source Heat Pump?
Over 70% of properties in Shropshire and North Wales are suitable for an air source heat pump. The key factors are your current heating system, insulation level, radiator sizing, available outdoor space and hot water cylinder. This guide covers every suitability question clearly — so you know exactly where your property stands before booking your free survey with Princes LHS, Shropshire's MCS accredited ASHP installer.
- Free Home Suitability Survey
- MCS Accredited Engineers
- £7,500 BUS Grant Available
How Suitable Is the Typical Shropshire Home?
Based on properties surveyed by Princes LHS across Shropshire and North Wales.
Detached and semi-detached houses
Properties on oil or LPG heating
Properties with existing radiators
Properties with adequate outdoor space
Properties meeting BUS grant criteria
The only way to know for certain is a free home survey. Ours takes around an hour and carries no obligation.
The Future Homes Standard is already in effect for new builds
From 2025, all new homes in England must use low-carbon heating such as air source heat pumps. Existing homeowners who upgrade now do so with a £7,500 government grant. Waiting means potentially higher costs and a smaller grant in future rounds.
Suitability Factors
The 5 Key Factors That Determine Whether Your Home Is Suitable for an ASHP
Princes LHS assesses all five of these during your free home survey. Most Shropshire properties score well across the majority of factors — and where a factor needs attention, we tell you exactly what is needed and the associated cost before you commit to anything.
01
Current Heating System
Your existing heating system is the first factor we assess — and for most Shropshire homeowners it is the most straightforward one. If your property currently uses a gas boiler, oil boiler, LPG boiler or direct electric heating, you qualify for the £7,500 Boiler Upgrade Scheme grant when switching to an air source heat pump.
Properties on oil or LPG typically see the greatest financial benefit from switching, as these fuel costs are the most exposed to international price volatility. Rural Shropshire and North Wales properties — many of which are off the gas grid — are among the strongest candidates for ASHP installation.
Properties with an existing air source heat pump or ground source heat pump do not qualify for the BUS grant when replacing like-for-like, but may still benefit from an ASHP upgrade on efficiency and performance grounds.
02
Insulation Level
An air source heat pump works in properties at any insulation level, but the better insulated your home, the lower the heat demand, the smaller the system required and the lower your annual running costs. This is why insulation is one of the first things our surveyors assess.
We carry out a full heat loss calculation — not an estimate — for every property we survey. This tells us exactly how much heat your home needs to maintain a comfortable temperature on the coldest Shropshire winter day. We then size the ASHP correctly for that figure, which avoids both oversizing (wasteful and expensive) and undersizing (inefficient and uncomfortable).
Where insulation improvements would meaningfully reduce running costs or system size, we flag these during the survey. Adding loft insulation, for example, is typically low-cost and can reduce annual running costs by a meaningful amount. It is also a requirement for your Boiler Upgrade Scheme eligibility if listed on your EPC.
03
Radiators and Heat Emitters
This is the question Princes LHS receives most often from Shropshire homeowners considering an ASHP: will my existing radiators work with a heat pump? In most cases, yes.
Air source heat pumps operate at a lower flow temperature than gas or oil boilers — typically 45°C to 55°C compared to 65°C to 80°C for a conventional boiler. This means radiators need to be large enough to emit sufficient heat at the lower temperature. Radiators that are already well-sized or slightly oversized for a room will work effectively with an ASHP without any modification.
Where individual radiators are too small for the room’s heat demand, we identify these during the heat loss survey and include the cost of replacement in your fixed-price installation quote. Radiator replacement costs typically range from £100 to £300 per radiator and are always confirmed before you agree to proceed.
Underfloor heating works extremely well with air source heat pumps and can be added as part of the installation if desired. However, it is not required — the majority of our Shropshire ASHP installations use existing radiators throughout.
04
Outdoor Space for the External Unit
Every air source heat pump requires an external unit — the component that extracts heat from the outside air. For the vast majority of Shropshire and North Wales properties, finding a suitable location is straightforward.
The unit requires a clear space roughly the size of a large washing machine — typically around 1 metre wide by 1 metre deep — with unobstructed airflow on at least the front-facing side. It operates at 40 to 60 decibels, which is quieter than most gas boilers and comparable to a standard refrigerator.
The unit can be ground-mounted or wall-mounted, positioned at the side or rear of your property. In nearly all cases, installation is permitted development and does not require planning permission, provided the unit is not on a wall or roof facing a highway and is within the size thresholds set by Permitted Development Rights. Our surveyors confirm this during your free home visit.
For listed buildings or properties within conservation areas, additional checks may be needed. If this applies to your property, let us know when you enquire and we will advise accordingly.
05
Hot Water Cylinder
Air source heat pumps heat both your central heating circuit and your domestic hot water. Unlike a combi boiler, which heats water on demand, an ASHP heats and stores hot water in a hot water cylinder. If your property already has a suitable cylinder, it can often be retained or used with minimal modification.
If your property does not have a cylinder — for example, if you currently have a combi boiler — a new hot water cylinder will need to be installed as part of your ASHP installation. This is the most common additional cost our Shropshire customers encounter. A suitable cylinder typically costs £600 to £1,200 depending on size and specification, and is always confirmed and included in your fixed-price quote before you proceed.
Cylinder sizing is calculated based on your household’s daily hot water demand, number of bedrooms and bathroom configuration. Our surveyors calculate this accurately during your free home visit so the cylinder is neither undersized nor wastefully oversized.
Property Types
Air Source Heat Pump Suitability by Property Type in Shropshire
Different property types have different suitability profiles. The guide below covers the most common property types across Shropshire and North Wales and what to expect from a suitability perspective for each.
Detached House
Typically the most straightforward ASHP installation. Generous outdoor space, usually well-sized radiators and good access for pipework. Most detached properties in Shropshire are strong candidates.
Semi-Detached House
Very commonly installed. Side or rear garden usually provides sufficient space for the external unit. Shared walls have no impact on ASHP suitability. Pipework routing is straightforward in most cases.
Terraced House
Suitable in most cases. Rear garden or rear yard access is needed for the external unit. Where access to the rear is only through the house, pipework routing needs assessment. Our surveyor confirms feasibility at your free visit.
Bungalow
Bungalows are excellent candidates for ASHP, particularly when combined with underfloor heating on the ground floor. Single-storey heat distribution is efficient and heat loss is often lower than for two-storey properties of equivalent footprint.
Period or Stone Property
Common across Shropshire. Solid stone walls have higher heat loss than modern cavity walls, meaning the ASHP is sized accordingly. Running costs are slightly higher than for well-insulated modern homes but switching from oil or LPG still delivers a clear financial benefit for most period properties.
Flat or Apartment
Ground floor flats with outdoor access can be suitable. Upper floor flats are more complex due to external unit placement restrictions and shared building rules. We advise on a case-by-case basis. Speak to our team before booking a survey.
Radiators in Detail
Will an Air Source Heat Pump Work With My Existing Radiators?
This is the most common concern we hear from Shropshire homeowners considering an ASHP. The answer in most cases is yes — but the detail matters. Here is exactly what our engineers assess during your free survey.
✅ Your radiators will work well if...
- Your current boiler runs at a low flow temperature (many modern condensing boilers do)
- Your radiators feel comfortably warm at the lower end of your boiler's thermostat setting
- Your radiators are large relative to the room size — common in older Shropshire properties where radiators were oversized for older boilers
- Your property has underfloor heating in some or all rooms
- You have had radiators replaced or upgraded in the last 10 years
⚠️ Radiator upgrades may be needed if...
For many households, this is not just about upgrading heating. It is about securing grant support while it is available, reducing dependence on older systems, and making a smarter long-term decision for the home.
Note on flow temperature: Air source heat pumps achieve their best SCOP efficiency rating at lower flow temperatures (around 35°C to 45°C). The higher the flow temperature required to heat your home adequately, the lower the system efficiency. This is why correct radiator sizing matters — it allows the ASHP to run at its most efficient operating point, keeping your running costs as low as possible.
Insulation and Performance
How Your Insulation Level Affects ASHP Performance and Running Costs
Your property's insulation level determines how much heat it loses on a cold day, which directly affects both the size of ASHP needed and your annual running costs. The table below shows how different insulation scenarios affect a typical three-bedroom Shropshire property.
| Insulation Level | Typical Heat Demand | ASHP Size Required | Est. Annual Running Cost | SCOP Achievable |
|---|---|---|---|---|
| Excellent — modern cavity walls, 270mm loft insulation, double glazing throughout | 6 to 8 kW | 8 kW unit | £700 to £950 | 3.5 or higher |
| Good — cavity walls insulated, 200mm loft insulation, mostly double glazed | 8 to 11 kW | 10 to 12 kW unit | £900 to £1,200 | 3.0 to 3.5 |
| Average — partial insulation, some single glazing, older property | 11 to 14 kW | 12 to 14 kW unit | £1,100 to £1,500 | 2.5 to 3.0 |
| Poor — solid walls, minimal insulation, older single glazing | 14 to 18 kW | 14 to 16 kW unit | £1,400 to £2,000 | 2.2 to 2.5 |
All running cost estimates are based on current electricity prices. Even at the lower SCOP levels shown for poorly insulated properties, switching from oil or LPG heating typically still delivers a net annual saving. Figures are indicative and your Princes LHS surveyor will provide property-specific projections at your free home visit.
Princes LHS includes insulation recommendations as part of every free home survey — not just ASHP sizing. Where a simple insulation improvement would meaningfully reduce your running costs or unlock your BUS grant eligibility, we will tell you clearly. Book your free survey here.
Common Concerns
Quick Answers to the Most Common ASHP Suitability Questions
✅ Will it work in an old Shropshire stone property?
Yes. Stone-built properties are very common in Shropshire and we install ASHPs in them regularly. Solid stone walls have higher heat loss than cavity walls, so the system is sized accordingly. Switching from oil or LPG still delivers a clear financial benefit for most stone properties, even before the £7,500 grant is applied.
✅ Will it work if I am off the gas grid?
Yes — and off-grid properties are among our most common installations across Shropshire and North Wales. Properties on oil, LPG or electric heating see the greatest running cost reduction when switching to an ASHP, and all qualify for the full £7,500 Boiler Upgrade Scheme grant.
✅ Will it work in winter in Shropshire?
Yes. Modern air source heat pumps are designed to operate efficiently at temperatures as low as -20°C. Shropshire winters rarely fall below -5°C. The system maintains full heating output throughout winter without any reduction in performance. It does not freeze or lose efficiency in typical UK cold weather.
✅ Can I use it for hot water as well as heating?
Yes. Your ASHP heats both your central heating circuit and domestic hot water. A hot water cylinder stores heated water ready for use. If you currently have a combi boiler with no cylinder, one will need to be added. This is confirmed and costed during your free survey and included in your fixed-price quote.
⚠️ What if I have a listed building?
Listed buildings may require listed building consent for external alterations including the installation of an ASHP external unit. Princes LHS can advise on the implications for your specific property. In many cases a suitable location can be found that avoids the need for consent, but this is assessed on a property-by-property basis.
⚠️ What if I have a flat or upper floor apartment?
Ground floor flats with access to outdoor space are usually suitable. Upper floor apartments are more complex due to external unit placement and shared building rules. Contact us before booking a survey and we will advise whether your specific property is likely to be workable before you invest time in a visit.
Book Your Free ASHP Home Suitability Survey With Princes LHS
Our free home survey is the definitive answer to whether your Shropshire or North Wales property is suitable for an air source heat pump. It takes around an hour and carries absolutely no obligation to proceed.
- Full heat loss calculation
Room-by-room assessment of your property's actual heat demand on the coldest day of the year.
- Radiator assessment
We check every radiator in your property against the heat loss calculation to identify any that need upgrading.
- ASHP system sizing
We specify the correct output capacity for your property — no oversizing, no undersizing.
- BUS grant eligibility confirmation
We confirm whether your property and heating system qualify for the £7,500 Boiler Upgrade Scheme grant.
- Fixed-price installation quote
A fully itemised, fixed-price quote with the £7,500 grant already deducted. No surprises after you agree to proceed.
- Running cost projection
A property-specific estimate of your annual running costs versus your current heating system, based on real heat demand data.
Book Your Free Home Suitability Survey
We cover all of Shropshire, North Wales, Oswestry, Wrexham, Shrewsbury and Chester. Survey appointments are typically available within two weeks.
⚡ £7,500 BUS grant available now — book your survey whilst grant funding remains at this level
Common questions
Air Source Heat Pump Suitability FAQs: Shropshire and North Wales
Will an air source heat pump work with my existing radiators?
In most cases yes. Air source heat pumps work with existing radiators provided they are adequately sized for the room’s heat demand at a lower flow temperature. Our surveyors carry out a heat loss calculation for every room during your free home visit and identify any radiators that need upgrading. Where upgrades are needed, the cost is always confirmed in your fixed-price installation quote before you proceed. Typical radiator replacement cost is £100 to £300 per unit.
Do I need underfloor heating for an air source heat pump? ▾
No. Underfloor heating is not required for an air source heat pump to work effectively. The majority of ASHP installations we complete across Shropshire and North Wales use existing radiators throughout. Underfloor heating works exceptionally well with ASHPs due to the low flow temperature, and can be added as part of the installation if desired, but it is entirely optional.
How much outdoor space do I need for an air source heat pump?
The external ASHP unit requires a clear space roughly the size of a large washing machine, with unobstructed airflow on the front-facing side. It can be wall-mounted or ground-mounted and positioned at the side or rear of your property. Planning permission is not usually required as ASHP installations are permitted development in England and Wales in most cases. Our surveyors confirm the best location and permitted development status during your free home visit.
Can an air source heat pump heat an old or draughty house?
Yes. An air source heat pump can be installed in any property, including older and less well-insulated homes. The system is sized based on a proper heat loss calculation, so the output is matched to what your property actually needs. Running costs will be higher in a poorly insulated property, but switching from oil or LPG still typically delivers a meaningful financial saving. We will also identify the most cost-effective insulation improvements during your free survey.
Does an air source heat pump need a hot water cylinder?
Yes. Unlike a combi boiler, an air source heat pump requires a hot water cylinder to store heated water. If your property already has a suitable cylinder, it may be usable with minor modification. If you currently have a combi boiler, a new cylinder will need to be installed. This is one of the most common additional costs for our Shropshire customers. Cylinder cost is typically £600 to £1,200 and is always confirmed at survey and included in your fixed-price quote.
Is an air source heat pump noisy?
Modern air source heat pumps operate at 40 to 60 decibels — roughly equivalent to a standard refrigerator and quieter than most gas boilers when running. The external unit produces a gentle hum that is rarely noticeable from inside the property and typically inaudible from neighbouring properties at normal distances. Our surveyors assess unit placement to minimise any noise impact during your free home visit.
Get in Touch
Find Out If Your Shropshire Home Is Suitable — Free, No Obligation
Princes LHS are MCS accredited ASHP installers covering all of Shropshire, North Wales, Oswestry, Wrexham, Shrewsbury and Chester. Your free home survey includes a full heat loss calculation, radiator assessment, BUS grant eligibility check and a fixed-price quote with the £7,500 already deducted.
VAT No – 826 8945 79 | Company Registered No – 05763586 | Registered in England
Registered Address: The Rennet Works, Market Street, Ellesmere, Shropshire, England, SY12 0AN
Princes LHS Ltd is an Introducer Appointed Representative (Financial Services Register No. 1022940) of Phoenix Financial Consultants Limited (Phoenix). Phoenix is a credit broker, not a lender. Phoenix is authorised and regulated by the Financial Conduct Authority (FRN: 539195), and offers finance from its panel of lenders. All finance subject to status and credit checks.