Air Source Heat Pump Installation in London
At PHS Engineers Ltd, we provide specialist air source heat pump installation, servicing, and repair across all areas of London. Whether you’re a homeowner looking to reduce energy bills or a commercial client aiming to meet sustainability targets, our certified engineers deliver high-performance heat pump solutions tailored to the demands of urban living.
What is an Air Source Heat Pump (ASHP)?
An air source heat pump (ASHP) is a highly efficient, electrically powered heating system that transfers heat from the outside air into your home. It operates using a refrigeration cycle, similar to a reverse fridge, allowing it to extract usable heat even in low outdoor temperatures.
The most commonly used type in the UK is the air-to-water heat pump, which supplies hot water to radiators, underfloor heating systems, and hot water cylinders. By generating more heat energy than the electricity it consumes, an ASHP can offer efficiencies of 300-400%, making it a more sustainable alternative to gas or oil boilers.
Benefits of an air source heat pump include:
- Lower energy bills
- Reduced carbon emissions
- Minimal maintenance
- Eligibility for government grants such as the Boiler Upgrade Scheme
As London moves towards greener energy targets, air source heat pumps are becoming a preferred solution for both domestic and commercial properties. At PHS Engineers Ltd, we help clients across the capital transition to renewable heating with expertly designed, installed, and maintained systems.
At PHS Engineers Ltd, we provide expert installation of air source heat pumps across Greater London. Whether you’re upgrading your home heating or looking for a low-carbon solution for a commercial property, our team delivers tailored systems that balance performance, efficiency, and compliance with London-specific building standards.
From initial consultation and site assessment to full system commissioning, we manage every stage of the process with precision and professionalism. We also advise on eligibility for the Boiler Upgrade Scheme, helping reduce upfront costs.
We work with leading brands, including but not limited to:
- Daikin
- Mitsubishi Electric
- Samsung
- Vaillant
- NIBE
- LG
- Hitachi
- Panasonic
- Viessmann
Whether it’s a domestic retrofit or a large-scale commercial system, we have the experience and technical expertise to get it right first time.
Professional Air Source Heat Pump Installers in London
Air Source Heat Pump Servicing in London
Regular servicing is essential to maintain the efficiency and longevity of your air source heat pump especially in high-demand urban environments. At PHS Engineers Ltd, we offer thorough and reliable ASHP servicing throughout London for both residential and commercial systems.
Each service includes:
- Inspection and cleaning of filters and coils
- Refrigerant pressure and performance checks
- Electrical component testing and control calibration
- Early fault detection and efficiency optimisation
With annual or biannual service plans available, we help London property owners reduce running costs, avoid system downtime, and stay compliant with manufacturer warranties. Our flexible scheduling ensures minimal disruption, even in the busiest parts of the city.
If your air source heat pump is underperforming or has stopped working, our London-based engineers offer a rapid and professional repair service. With extensive experience across all major ASHP brands, we can quickly identify faults and carry out effective repairs – often on the first visit.
We frequently resolve issues such as:
- System lockouts and error codes
- Loss of heating or hot water
- Noisy or vibrating outdoor units
- Faulty sensors, fans, or compressors
- Low refrigerant levels or pressure issues
Our F-Gas certified engineers operate across all London boroughs and are equipped with diagnostic tools and commonly required parts to restore your system’s performance with minimal delay.
Air Source Heat Pump Repairs in London
Is an Air Source Heat Pump Right for my Home?
Air source heat pumps (ASHPs) are an excellent option for many London homes, offering a low-carbon, energy-efficient alternative to traditional gas or electric heating systems. Whether you live in a terraced house, a flat with outdoor space, or a detached property, an ASHP could provide significant long-term savings and reduce your environmental impact.
These systems are particularly well-suited to well-insulated homes, where they can operate efficiently at lower temperatures. If your property meets modern insulation standards or is undergoing renovation, an ASHP can maintain consistent warmth throughout the year with minimal energy consumption.
Key factors to consider:
- Outdoor space: You’ll need adequate room for the external unit with good airflow.
- Planning considerations: Most installations fall under permitted development, but restrictions may apply in conservation areas or listed buildings.
- System compatibility: Ideal when paired with underfloor heating or low-temperature radiators.
- Government support: You may be eligible for a £7,500 grant under the Boiler Upgrade Scheme.
If you’re unsure whether an ASHP is right for your London property, PHS Engineers Ltd can carry out a full technical assessment and provide clear, expert advice on suitability, performance expectations, and available incentives.
The cost of installing an air source heat pump in the UK typically ranges from £7,000 to £14,000, depending on your property size, system specification, and installation complexity. Commercial systems may cost more.
Key factors affecting cost include:
- Size and heat demand of the property
- Type and brand of the ASHP unit
- Existing heating setup
- Insulation levels
- Labour and commissioning requirements
While the initial investment is considerable, ASHPs offer long-term savings on energy bills, especially when replacing oil, LPG, or electric heating. Grants of up to £7,500 are also available through the Boiler Upgrade Scheme (BUS) for eligible properties.
At PHS Engineers Ltd, we offer transparent pricing and tailored advice to help you choose the most cost-effective solution for your London property.
How Much Does an Air Source Heat Pump Cost?
What are the Running Costs of an Air Source Heat Pump?
When designed correctly and fitted in a home with good insulation, air source heat pumps can be up to 300% more efficient than other forms of heating. Here are some numbers to compare:
- ASHP has an input cost of 15.0p/kWh, a running cost of 5.0p/kWh and an efficiency of 300%.
- Mains Gas has an input cost of 4.3/kWh, a running cost of 4.8p/kWh and an efficiency of 89%.
- Electric has an input cost of 15.0p/kWh, a running cost of 15.0p/kWh and an efficiency of 100%.
- Oil has an input cost of 4.9p/kWh, a running cost of 5.3p/kWh and an efficiency of 91.6%.
Please note that these figures can change based on energy prices.
You can also expect that there will be maintenance costs much like other heating sources. In order to maintain your RHI tariff payments, you’ll need to inspect your air source heat pump each year. This can cost around £200 per year if serviced by a qualified heating engineer.
Choosing to install an air source heat pump is a great decision because it gives you access to a number of grants. This is part of the Government’s plan to reduce reliance on fossil fuels and switch to environmentally-friendly options such as air source heat pumps. As such, they have been included in the Renewable Heat Incentive (RHI) which allows you to reduce the cost of installation and also gain access to lower tariff costs at 10.85p/kWh.
The RHI offers homeowners quarterly payments over a seven-year period based on the annual heating consumption of their property, and also the amount of environmentally-friendly energy it produces. At the current rate of 10.85p/kWh for air source heating, you could gain a total of £7,000 through RHI payments over 7 years. This figure is based on an average three-bedroom house that uses 15,000kWh of heating per year.
Air Source Heat Pump Grants
Air Source Heat Pumps FAQs
Since it uses electricity it’s not completely carbon-neutral. However, a heat pump can be a great way to reduce your carbon emissions since it doesn’t use fossil fuels.
It’s recommended to insulate your home and have it up to modern Building Regulation standards to ensure that your air source heat pump can work efficiently.
If your building is well-insulated and you have some space outside your home to install the air source heat pump, then it can be a good choice as an environmentally-friendly way to heat your home.
Air source heat pumps are up to 300% efficient. This means that for every unit of energy it uses, it outputs roughly three times the units in heat energy for the property.
If you’re currently installing or have installed an underfloor heating system, then you’ll be glad to know that an air source heat pump can work perfectly fine with underfloor heating as well. An air source heat pump is extremely efficient when it needs to produce low water temperatures, and this makes it great for an underfloor heating system.
PHS: Air Source Heat Pump Experts in London
Whether you’re planning a new installation, require routine servicing, or need urgent repairs, PHS Engineers Ltd is your trusted partner for air source heat pump services across London. Our qualified engineers deliver efficient, compliant, and future-ready solutions tailored to your property and energy goals.
You can phone us by calling 0208 252 8927, or you can send us an email via our contact page.
Take the next step towards cleaner, more cost-effective heating – we’re here to help every step of the way.