An EPC is no longer required for BUS eligibility. You may need to provide photo evidence of the existing fossil fuel system, such as a photo of the boiler, later in the process.
Oil/LPG uplift
Properties replacing oil can receive an additional £1,500, giving a total BUS grant of £9,000.
Would you like to see pricing with the BUS grant applied?
Step complete
Tailored hardware packages
Correct sizing of your heat pump involves a comprehensive assessment of your property including accurate calculations around energy usage and heat loss. We will do this prior to installation.
For the moment, based on high-level information, we have calculated a heat loss of 17.0kW and assumed 5 occupants.
7
Heat loss (kW)
2
Occupants
Cylinder sizing
We typically recommend 50 litres of cylinder capacity per occupant. However, you can override this here.
350 litres
0l
100l
200l
300l
400l
2 packages available
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Heat pump
Selected
Vaillant aroTHERM
1 x heat pump
1 x water cylinder
7 kW
300 litre water cylinder
estimated price
£3,766
£12,766
no VAT applicable
BUS grant
£9,000 off
Heat pump
Stiebel
1 x heat pump
1 x water cylinder
10 kW (9.49 kW actual capacity)
281 litre water cylinder
estimated price
£4,358
£13,358
no VAT applicable
BUS grant
£9,000 off
Indicative savings
We can provide you with high-level indicative savings you can expect to make through replacing your boiler + radiators system with a heat pump. If you proceed with the installation, we will provide you with an MCS accredited design which will provide you with accurate payback information.
Are you interested in seeing these savings?
Step complete
Additional options available for your system
As part of the survey, we can discuss extras that you might need or want beyond the standard heat pump installation. You can play with these extras below to see how they might affect the overall cost.
Downstairs Radiator – Installing a New Radiator with New Pipework
This option involves fitting a new downstairs radiator combined with brand-new pipework. We install new pipe runs where the existing pipes are undersized, corroded, or poorly routed, ensuring the radiator can achieve the higher flow requirements of a heat pump system.
Our price includes a brand-new radiators, required new pipework, materials, and full installation. Please add on the numbers of radiators you require.
£450 per unit
0
Upstairs Radiator – Installing a New Radiator with New Pipework
This option covers installing a brand-new upstairs radiator along with new pipework. We remove the old pipe runs serving that radiator and install new pipes to ensure the correct flow rate for a heat pump. New pipework is required where the existing pipes are too small, restricted, or unable to deliver the flow the system needs.
Our price includes a brand-new radiators, required new pipework, materials, and full installation. Please add on the numbers of radiators you require.
£420 per unit
0
Upstairs & Downstairs Radiators – Replace a Radiator Using Existing Pipework
This option is for replacing any upstairs and/or downstairs radiators while keeping the existing pipework in place. We can retain the current pipes if they are already the right size, in good condition, and capable of delivering the correct flow rate for the heat pump. We simply remove the old radiator and fit a modern, correctly sized replacement.
Our price includes a brand-new radiator, fitting materials, and full installation. Please add on the numbers of radiators you require. Pipe work not included.
£135 per unit
0
Thermostatic Radiator Valves
With an air source heat pump it's important that your radiators have thermostatic radiator valves (TRVs). These help accurately moderate the temperature in each room. We'll check this during our survey. But here you can play with the indicative cost of each TRV that might need to be added.
£9 per unit
0
Core Drilling for Heat Pump Pipe Entry
This add-on covers drilling a clean, professional core hole through the external wall to allow the heat pump flow and return pipes to enter the property. The hole is created using specialist core-drilling equipment to ensure a precise finish without damaging surrounding brickwork. Once drilled, the opening is prepared so the pipes can be safely routed into the dwelling, ready for connection to the internal system.
£150 per unit
0
Why a Heat Pump?
Why Choose a Heat Pump?
Discover why more homeowners are switching to air source heat pumps for efficient, comfortable and sustainable heating.
01
Efficient
Heat pumps can achieve efficiencies of up to 400%, delivering up to four units of heat for every unit of electricity consumed.
02
Sustainable
Heat pumps use renewable heat from the air instead of burning fossil fuels, helping to reduce your home's carbon emissions.
03
Cost Saving
Heat pumps produce more heat from less energy, helping reduce running costs, especially when paired with solar panels.
04
Consistent Comfort
Weather compensation automatically adjusts your heating to outdoor temperatures, maintaining consistent comfort throughout the year.
05
Long Lifespan
With annual servicing, a professionally installed heat pump can last 20–25 years, delivering reliable long-term performance.
Your Local Heat Pump Specialists
Why Choose Menai?
Performance-led design, premium products and dedicated support from an experienced local team.
Performance-Led Design
Bespoke design calculations ensure your system is built to perform. After installation, we use real-world performance data to monitor and optimise efficiency.
Premium Products
We carefully select high-quality heat pumps from trusted manufacturers to deliver reliability, strong performance and long-term value.
20+ Years’ Experience
More than two decades in renewable energy gives our team the technical knowledge and optimisation expertise needed to deliver high-performing systems.
Trusted Partners
We work with leading manufacturers and industry organisations, backed by advanced training, recognised accreditations and trusted partnerships.
Heat Geek Installers
Our engineers have completed advanced Heat Geek training in heat-pump design, commissioning and performance optimisation.
Dedicated Aftercare
Your dedicated Customer Liaison Officer provides ongoing support before, during and after installation, helping you get the best from your system.