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Air Source Heat Pumps
Choose City Plumbing for a wide range of Air Source Heat Pumps and expert guidance for a smoother transition to low-carbon energy. As the UK targets net-zero, ASHPs lead the way in decarbonising heat, offering a reliable alternative to traditional gas or oil boilers for homes and businesses.
How They Work
Air Source Heat Pumps use outdoor air to generate heating and hot water, even at temperatures as low as -15°C. They operate like a refrigerator in reverse, using a fan and refrigerant to extract heat, which is then transferred into the heating system and hot water cylinder.
Benefits of ASHPs for Trade & Clients
- High Efficiency: With COP (Coefficient of Performance) ratings typically between 3 and 4, ASHPs deliver an impressive 3–4kW of heat for every 1kW of electricity consumed, helping you and your clients dramatically lower running costs while enhancing energy efficiency.
- Environmental Impact: Embrace sustainable practices and set your business apart. By utilising renewable air energy, ASHPs drastically reduce carbon emissions compared to fossil fuel systems, making a real difference for the planet and your clients.
- Government Incentives: Take advantage of substantial cost savings and boost your project’s affordability. Installations by MCS-certified professionals qualify for the Boiler Upgrade Scheme (BUS), which now offers grants of up to £7,500 (or £9,000 for off-grid properties, starting July 2026).
- Versatility & Durability: Choose modern ASHPs for unmatched flexibility, enjoy year-round heating and cooling, with a 15–20-year operational lifespan and minimal maintenance, giving you and your customers peace of mind.
Types of ASHPs
- Monobloc Systems: One single outdoor unit houses all refrigeration components. You can install these systems more easily by connecting the water pipes to the property.
- Split Systems: These systems combine an outdoor unit and an indoor hydrobox. You can place them flexibly, but only an F-Gas-qualified installer can install them.
- High vs Low Temperature: Low-temperature models suit new builds and underfloor heating. High-temperature pumps reach 60-70°C for existing radiators.
Key Installation Considerations
Successful ASHP integration requires careful planning:
- MCS Certification: Essential for accessing government grants and ensuring quality standards.
- Sizing: Accurately calculate heat loss. Use our Heat Loss/BTU Calculator to identify the correct unit size.
- System Integration: Upgrade existing radiators to larger "low-temperature" models for better efficiency.
- Logistics: Ensure sufficient outdoor space and that the electrical supply meets the system's load and noise standards.
- Choose with confidence: City Plumbing proudly stocks trusted, industry-leading names, including Vaillant, Daikin, Mitsubishi, Samsung, Midea, and Bosch, giving you access to the most advanced technology for every project.
Supporting Products & Accessories
Maximise your investment and deliver peak system performance by equipping each heat pump installation with the right accessories and components:
- Heat Pump Cylinders: Specially designed with larger internal coils for efficient heat transfer.
- Low-Temperature Radiators: Larger surface areas to provide warmth at lower flow temperatures.
- System Protection: Use magnetic filters, inhibitors, and dosing pots to maintain water quality.
- Controls: Intelligent thermostats and weather compensation sensors.
Buy Air Source Heat Pumps From City Plumbing
City Plumbing is the number one choice for local plumbers' merchants and renewable energy products for both homeowners and installers working in the trade.
With a credible Trustpilot rating, a wealth of knowledge from four-plus decades of experience, and outstanding plumbing and heating products and advice, we’re here to help you get the job done.
Boasting more than 350 branches nationwide, our prices are competitive to help ensure you finish all your projects on budget.
With several Delivery Options and a Click & Collect service, if you’re looking for a City Plumbing near me, type your postcode into our branch locator to find your nearest City Plumbing Supplies.
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