As UK homeowners look for more efficient and environmentally friendly heating solutions, it has become common to compare and contrast different methods of heating your home. In particular, many homeowners want to know the pros and cons of air source heat pumps vs gas boilers.
While gas boilers remain a staple, currently used in 23 million homes across the UK, air source heat pumps (ASHPs) – like Adlår Castra UK’s award-winning dual heat pump system – offer a renewable alternative with many additional benefits.
In this guide, our heating experts will look at the cost savings, energy efficiency, and environmental impact of both heating options, to help you decide on the best heating solution for your needs.
Cost Comparison: Upfront Costs vs. Long-Term Savings
Initial Installation Costs
When looking at the installation costs of air source heat pumps vs gas boilers, it’s clear that gas boilers generally have a lower upfront cost.
Installation costs for a gas boiler typically range from £1,000 to £2,000 in the UK, while the new gas boiler itself typically costs between £650 – £3,000. On average, this results in a combined total cost of £3,000, according to Checkatrade.
On the other hand, The Renewable Energy Hub UK finds that installing an air source heat pump can cost between £7,000 and £16,000 overall, depending on your property size and features of the system selected. Installation itself tends to make up roughly half of this cost.
However, the UK government’s Boiler Upgrade Scheme provides a grant of up to £7,500 toward heat pump installation, which can significantly reduce initial expenses for qualifying homes.
Using an experienced installer who offers competitive installation prices can also help; for example, Adlår’s pricing for smaller properties starts below £1,000, thanks to our direct from installer model.
Operational and Maintenance Costs
Although gas boilers are cheaper to install, their operational costs can add up over time due to regular gas consumption and annual servicing costs. The typical running cost of a new gas boiler in the UK is estimated at £90 per month, resulting in an annual cost of approximately £1,100, depending on gas prices and home heating demands.
In comparison, air source heat pumps use electricity and are far more efficient, which translates to lower long-term energy costs. While electricity prices are higher per unit than gas, ASHPs use less energy overall, potentially reducing heating costs by 20 – 40% annually.
Long-Term Savings Potential
The Energy Saving Trust estimates that homes switching from gas boilers to air source heat pumps can save between £395 and £425 per year, depending on home size and heating habits.
This makes air source heat pumps a solid long-term investment, with the added advantage of reduced maintenance needs.
Energy Efficiency: How Efficient Are Air Source Heat Pumps Compared to Gas Boilers?
Energy Output and Efficiency Ratings
One of the most significant differences between air source heat pumps and gas boilers lies in energy efficiency.
Heat pumps have a Coefficient of Performance (COP) rating to convey their efficiency. This typically ranges from 3 to 4 in the UK, meaning they produce three to four units of heat for every unit of electricity used (making them 300% – 400% efficient).
In contrast, even the most efficient gas boilers, which have the highest possible SEDBUK rating of A, achieve a maximum of 90 – 95% efficiency, meaning some energy is inevitably lost during combustion.
Seasonal Efficiency and Performance
Heat pumps maintain efficiency throughout the year, adapting to seasonal temperatures to provide consistent heating. Indeed, ASHPs are designed to operate effectively even in temperatures as low as -15°C.
However, cold weather during UK winters can often cause a gas boiler to stop working, due to problems such as frozen pipes, more frequent use, issues with the ignition system, and loss of boiler pressure. Some sources suggest that as many as 45% of homeowners have experienced a boiler breakdown in the winter.
While gas boilers tend to become less efficient over time, especially if not well-maintained, heat pumps retain their performance with minimal servicing. Which? provides further insight into heating efficiency, for those who wish to learn more.
Smart Heating Options for Heat Pumps
Modern air source heat pumps often come with Wi-Fi-enabled controls, allowing homeowners to set schedules, monitor usage, and adjust temperatures from a smartphone app. This advanced control adds a layer of efficiency by reducing unnecessary energy use when no one is home, which gas boilers generally lack.
Environmental Impact: Carbon Emissions and Sustainability
Carbon Emissions of Gas Boilers vs. Heat Pumps
Gas boilers rely on natural gas combustion, which releases carbon dioxide – a primary greenhouse gas contributing to climate change. According to the Committee on Climate Change (CCC), residential heating in the UK is responsible for around 15% of carbon emissions, with gas boilers being a major contributor.
In contrast, air source heat pumps use electricity, which becomes increasingly green as the UK transitions to renewable energy sources. By using ASHPs, households can significantly reduce their carbon footprint. According to calculations by The Eco Experts, heat pumps reduce your annual carbon footprint by around 44% compared to a gas boiler.
A gas boiler emits approximately 2,000 to 2,500 kg of CO₂ per year, while a heat pump, depending on the electricity source, can reduce emissions to as little as 700 – 1,500 kg annually. Switching to a heat pump thus aligns with the UK government’s goals of reaching net-zero emissions by 2050.
Renewable Heating and Future Energy Goals
Air source heat pumps are part of a sustainable future, particularly as the UK government is incentivising renewable heating solutions to reduce dependence on fossil fuels.
The Boiler Upgrade Scheme and other grants are part of a larger strategy to make heat pumps a mainstream choice for residential heating.
With the option to connect heat pumps to solar panels, homeowners can further reduce energy costs and achieve an off-grid, low-carbon home heating solution.
Lifespan and Durability: How Long Do They Last?
Expected Lifespan Comparison
When it comes to longevity, air source heat pumps generally outlast gas boilers. Heat pumps can last up to 15 – 20 years with minimal maintenance, while conventional gas boilers typically need replacing after 10 – 15 years.
This makes heat pumps a better long-term investment, especially for homeowners aiming to reduce energy costs and environmental impact.
Maintenance Requirements
Gas boilers require annual servicing and frequent part replacements due to mechanical wear and tear, which adds to their long-term costs.
Air source heat pumps, however, need only minimal maintenance, such as periodic filter cleaning and an annual inspection, making them more convenient and cost-effective to maintain. The Renewable Energy Hub UK offers a guide on heat pump maintenance here.
Air Source Heat Pumps vs Gas Boilers: Which Heating Solution is Right for You?
Factors to Consider
When deciding between air source heat pumps vs gas boilers, the right option for you depends on several factors. Here are some considerations:
- Energy Efficiency. Even the least efficient ASHP offers better energy efficiency than the most efficient gas boiler.
- Initial Costs. If installation budget is your main concern, a gas boiler may be preferable due to its lower upfront cost. However, government grants like the BUS may help offset the difference in initial costs.
- Long-Term Savings. For those looking to invest in a sustainable solution with lower long-term energy costs, air source heat pumps are far superior.
- Environmental Goals. If reducing your carbon footprint is a priority, thanks to their low carbon technology, heat pumps are the greener option.
Lifestyle and Energy Goals
Homeowners who value long-term savings and sustainability will benefit more from air source heat pumps.
With government incentives, the initial cost gap between heat pumps and gas boilers is narrowing, making it easier to choose a renewable heating system.
For a future-proof heating solution, heat pumps align better with the UK’s environmental goals, and the government has announced plans to phase out new gas boiler installations in homes by 2025.
FAQs about Air Source Heat Pumps vs Gas Boilers
Q: Are heat pumps suitable for all homes?
A: Yes, but certain homes may require insulation improvements to maximise efficiency. Consult a professional heat pump installer for a personalised assessment.
Q: What is the cost of switching from a gas boiler to a heat pump?
A: The cost varies, but with the Boiler Upgrade Scheme grant, eligible homeowners can save up to £7,500 on installation costs.
Q: How much will I save in the long run?
A: Depending on your energy usage, switching from gas to an air source heat pump can save up to 40% on heating bills.
Q: How is a heat pump installed?
A: Installation involves mounting an outdoor unit and connecting it to an indoor heating system, typically within 1-2 days for minimal disruption.
Install Your Air Source Heat Pump with Adlår
When it comes to air source heat pumps vs gas boilers, heat pumps offer a sustainable, long-term solution with lower energy costs, greater efficiency, and reduced environmental impact.
Although the upfront investment may be higher, government incentives and lower operational costs make ASHPs an attractive option for UK homeowners committed to reducing their carbon footprint and future-proofing their homes.
Curious if an air source heat pump is right for your home? Trusted heat pump providers like Adlår Castra UK can offer a free site survey to assess your home’s suitability.
Contact us today to schedule a free consultation and find out how much you could save by switching to a renewable heating solution.
