Air Source Heat Pump vs Electric Combi Boiler – Part 2
09/09/2024
Air Source Heat Pump vs Electric Combi Boiler – Part 2
Choosing Between a 12kW Electric Combi Boiler and an ASHP with a Hot Water Tank: The Real Deal.
Updated September 2024
Selecting the right heating solution for your home isn’t just about ticking boxes; it’s about finding the perfect fit for your budget, lifestyle, and sustainability goals. In this post, we’ll compare our 12kW Elektra Easy.BPL electric combi boiler head-to-head against an air source heat pump (ASHP) paired with a 200L hot water storage tank, the most recommended alternative for UK homes: Let’s dive into the key factors—costs, efficiency, and impact—so you can make the most informed choice.
Energy Usage in the Average UK Home
The average UK household consumes about 2,700 kWh of electricity and 11,500 kWh of gas annually. Typically, around 9,200 kWh is used for heating and hot water in a typical three-bedroom home and a 2.4 average occupancy.
Source: https://www.ofgem.gov.uk/
Upfront Costs: The Inicial Outlay
When comparing the initial costs, the differences are substantial:
£150 (CH Filter, Isolator switch, MCB, Water Treatment System)
200 litres hot water tank
£1,500
n/a
Estimate Total Cost
£15,000 to £26,500
£3,550
Our ELEKTRA EASY.BPL electric combi boiler offers a significantly lower upfront investment. With a total of £3,550 versus £26,500 for the ASHP setup, the choice is clear if the initial cost is a priority.
Annual Running Costs: Day-to-Day Expenses
Now, let’s look at what it costs to run each system annually:
12kW Electric Combi Boiler: – Heating and Hot Water Consumption: 9,200 kWh annually.
– Additional Electricity for Hot Water Tank: 2,500 kWh average annually.
– Cost for Hot Water Tank: 2,500 kWh x £0.2236 per kWh = £559.00
– Maintenance: £200 annually.
– Total Annual Cost (including a £219.44 standing charge and maintenance): £1,801.29.
Verdict: The ASHP has lower annual running costs, saving about £565 per year. However, the significant upfront investment means you’ll be waiting a long time to see those savings add up.
Break-Even Point: When Does an ASHP Make Financial Sense?
The break-even point helps us determine when the ASHP’s savings outweigh its higher initial cost:
When factoring in repair costs on a biannual basis, the breakeven point moves to approximately 61.59 years and 41 years.
These costs add up over time and should be factored into the overall cost of ownership. While both systems have their merits, the higher repair costs associated with ASHPs make it important to carefully consider whether the potential energy savings justify the added expenses over the system’s lifetime.
Space Requirements: Size Does Matter
Space is another critical factor. The 12kW Electric Combi Boiler is compact and can be installed almost anywhere, requiring no additional space for a flue or hot water tank, it can fit into an average kitchen cupboard or under the stairs.
On the other hand, ASHP units are larger, usually installed outside, and require sufficient space for airflow and maintenance and the hot water storage tank adds to the space requirements significantly measuring in height an average of 1.2m in height, 76 cm in length and about 60 cm in width.
To effectively provide hot water for a 3 bedrooms home a hot water tank will be needed adding to the space requirement of an ASHP installation.
If you have limited space or aesthetic concerns, the electric boiler might be the more convenient choice.
Pros and Cons: A Quick Comparison
Features
Air Source Heat Pump (ASHP)
12kW Electric Combi Boilers
Upfront Cost
Higher (up to £26,500)
Lower ( about £3,550 to £4,000)
Annual Running Cost
Lower (£1,801.29)
Higher (£2,366.08)
Maintenance
More frequent, higher cost of parts and labour.
Less frequent, lower cost of parts and labour.
Energy Efficiency
Very high (COP of 2.5 to 4)
High, improving with grid renewables
Space Requirements
Requires outdoor space and substancial indoor space.
Compact, versatile installation. Can be installed almost anywhere.
Financial Point
≈26 to 41 years to break even
Lower upfront costs
Environmental Impact
Low emissions, high efficiency
Low emissions, improving with renewables
With the information you have now, which system would you choose?
Short-Term Choice: If minimizing upfront costs is your priority, the electric combi boiler is unbeatable.
Mid-Term Choice: Our 12kW electric combi boiler strikes a good balance between affordability and operational efficiency.
Long-Term Choice: The ASHP with a hot water tank may offer lower running costs, but the high initial expense and lengthy break-even period make it a less accessible option for many.
A break-even point of +30 years will be even longer if take into account possible repair and spare parts needed during these years.
If you’re after a heating solution that combines cost-effectiveness, simplicity, and reliability, our 12kW electric combi boiler is a smart choice for UK homeowners. It provides efficient heating without the financial strain of a substantial upfront investment, offering both peace of mind and value for money.
For more information on our range of electric combi boilers and to find the right solution for your home, visit our website here: Electric Combi Boiler Company
What’s Your Heating & Hot Water Priority?
Are you more focused on reducing your upfront investment or minimizing your long-term running costs?
How do you weigh the importance of initial costs versus ongoing savings in your decision-making process?
Share your thoughts below or reach out to us directly—we’re here to help you find the perfect heating solution for your home! .
Sources:
Heating Systems: Energy Saving Trust, Heating Systems Ofgem – Energy Consumption Data: link, Renewable Heat Incentive: link, British Gas – Energy Costs: link, National Grid – Energy Pricing: link. 200 litres hot water tank for heat pump installation: link. Cost of ASHP: link. Cost of servicing a heatpump: link
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