As the UK intensifies efforts to decarbonise home heating, ground source heat pumps (GSHPs) have emerged as a leading solution for energy-efficient, low-carbon warmth. With the government’s Boiler Upgrade Scheme (BUS) now offering up to £7,500 towards installation, there’s never been a better time to consider this sustainable technology.Heatable+3GreenMatch.co.uk+3Moneyweek+3
Top 3 Ground Source Heat Pumps in the UK (2025)
1. Viessmann Vitocal 350-G
- Output: 20.5–42.3 kW (single-stage), up to 84.6 kW (two-stage)
- Efficiency: SCOP up to 5.4
- Flow Temperature: Up to 70°C
- Price Range: £17,800–£22,300
- Best For: Large homes or properties with high heating demands
The Vitocal 350-G stands out for its exceptional power and efficiency. Its Enhanced Vapour Injection (EVI) compressor delivers high flow temperatures, making it ideal for older homes with traditional radiators. Additionally, it’s compatible with solar PV systems, enhancing its eco-friendly credentials.
2. NIBE S1156
- Output: 1.5–8 kW or 4–18 kW
- Efficiency: Seasonal Performance Factor (SPF) up to 6.22
- Features: Inverter-controlled, low noise, smart controls
- Best For: Medium to large homes seeking high efficiency
The NIBE S1156 is renowned for its intelligent inverter control, which adapts to your home’s heating requirements, ensuring optimal energy savings. Its low noise levels and smart connectivity make it a user-friendly choice for modern households.
3. Vaillant flexoTHERM
- Output: 5, 8, 11, 15, 19 kW
- Efficiency: A+++ rating
- Flexibility: Compatible with ground, air, or water sources
- Noise Level: Quiet Mark certified
- Best For: Homes requiring versatile installation options
Vaillant’s flexoTHERM offers unparalleled flexibility, allowing homeowners to choose between ground, air, or water sources. Its EVI compressor ensures high efficiency, and its Quiet Mark certification guarantees minimal noise disruption.
Government Grant: Boiler Upgrade Scheme (BUS)
The UK government’s BUS provides a substantial grant to support the installation of heat pumps:
- Grant Amount: £7,500 towards the cost of a ground source heat pump
- Eligibility: Homeowners in England and Wales with a valid Energy Performance Certificate (EPC) and no outstanding insulation recommendations
- Application Process: An MCS-certified installer applies on your behalf. Once approved, the grant is deducted from your installation cost.
This initiative aims to make low-carbon heating solutions more accessible, reducing both carbon emissions and energy bills for households.
Is a Ground Source Heat Pump Right for You?
Ground source heat pumps are most effective for:
- Homes with outdoor space: Sufficient land is needed for ground loop installation.
- Well-insulated properties: Maximises efficiency and energy savings.
- Long-term residents: Ideal for those planning to stay in their homes for several years to reap the benefits.
If your property meets these criteria, investing in a GSHP could be a sustainable and cost-effective heating solution.
Next Steps
- Assess your property: Determine if your home is suitable for a GSHP installation.
- Consult certified installers: Engage with MCS-certified professionals to get quotes and advice.
- Apply for the Grant: Your installer will handle the BUS application process.
- Plan installation: Schedule the installation at a convenient time.
By taking these steps, you can transition to a more sustainable heating system, reduce your carbon footprint, and potentially lower your energy bills.
To keep on top of the maintainance of the Ground Source Heat Pump, consider Blendedfluids range – your engineer should be aware of these products that not only help protect the system but improve the transfer of heat.
