Electric boilers have gained popularity in recent years as a heating solution, particularly in areas where natural gas is not readily available. However, these boilers come with their own set of drawbacks that homeowners should consider before making the switch. In this comprehensive guide, we’ll delve into the technical specifications and practical considerations surrounding the disadvantages of electric boilers.
High Running Costs
One of the primary disadvantages of electric boilers is their high running costs. Electricity prices in the UK currently average around 14 pence per unit, while natural gas costs around 4 pence per unit. This means that the cost of running an electric boiler can be significantly higher than a gas-powered alternative, especially for larger homes or those with high heating and hot water demands. According to industry data, the average annual running cost for an electric boiler is £800-£1,200, compared to £400-£600 for a gas boiler.
Limited Power Output
Electric boilers typically have a lower power output compared to gas boilers, with most models ranging from 3kW to 9kW. In contrast, gas boilers can have power outputs of up to 150kW, making them more suitable for larger properties or those with high heating and hot water requirements. This limited power output can be a significant drawback for homeowners with larger homes or high-demand applications, as the electric boiler may struggle to meet the necessary heating and hot water needs.
Dependence on Electricity Supply
Unlike gas boilers, which can continue to function during power outages, electric boilers are entirely dependent on a reliable electricity supply. This means that in the event of a power cut, the electric boiler will be unable to provide heating or hot water, potentially leaving homeowners without these essential services. This can be a significant issue, especially in areas prone to frequent power outages or severe weather events.
Higher Capital Cost
Electric boilers tend to have a higher upfront cost compared to gas boilers. According to industry data, the average cost of an electric boiler installation can range from £2,000 to £4,000, while a gas boiler installation typically costs between £1,500 and £3,000. This higher capital cost can be a significant barrier for homeowners, especially those on a tight budget or those who are already facing the costs of upgrading their electrical supply to accommodate the electric boiler.
Limited Efficiency
While electric boilers are highly efficient in terms of energy conversion, with efficiency ratings of up to 99%, they can be less efficient than direct electrical room heaters due to losses incurred during the heating process. This is because the electric boiler must first heat water, which is then circulated through the home’s heating system, resulting in some energy loss. In contrast, direct electrical room heaters can provide heat directly to the living space, potentially offering a more efficient heating solution for certain applications.
Risk of Blowing Fuses
Electric boilers typically require a significant amount of electricity, with a typical model drawing around 48 amps. This can cause issues with older fuse boxes rated at 60 amps, as the electric boiler’s power demand may exceed the fuse box’s capacity, leading to blown fuses if other appliances are running simultaneously. This can be a frustrating and potentially dangerous issue, especially in older homes with outdated electrical infrastructure.
Environmental Impact
Although electric boilers do not directly emit carbon dioxide (CO2), their environmental impact is largely dependent on the source of the electricity used to power them. If the electricity is generated from fossil fuels, such as coal or natural gas, the overall environmental impact may not be significantly reduced compared to a gas boiler. In areas with a higher proportion of renewable energy sources in the grid, the environmental benefits of an electric boiler may be more pronounced.
Limited Choice
Compared to the wide range of gas boiler models available on the market, the selection of electric boilers is relatively limited. This can make it more challenging for homeowners to find a model that perfectly fits their specific heating and hot water requirements, potentially leading to compromises or the need for additional equipment, such as water tanks, to ensure a consistent hot water supply.
Potential Need for Additional Equipment
In some cases, electric boilers may require additional equipment, such as water tanks, to ensure a consistent hot water supply, especially in larger homes or those with high hot water demands. This can add to the overall cost and complexity of the installation, as well as the ongoing maintenance requirements.
Maintenance and Upgrades
While electric boilers are generally easier to maintain than their gas-powered counterparts, they may require upgrades to the electrical supply to the property, which can add to the overall cost. This can include upgrading the fuse box, increasing the electrical capacity, or installing additional wiring to accommodate the higher power demands of the electric boiler.
In conclusion, the disadvantages of electric boilers are multifaceted and should be carefully considered by homeowners before making the switch from a gas-powered system. From high running costs and limited power output to dependence on electricity supply and environmental concerns, these factors can significantly impact the suitability and cost-effectiveness of an electric boiler installation. By understanding the technical specifications and practical considerations outlined in this guide, homeowners can make an informed decision that best suits their heating and hot water needs.
References
- GreenMatch. (2024, March 13). Gas Boiler vs Electric Boiler: Which is Better? Retrieved from https://www.greenmatch.co.uk/blog/electric-vs-gas-boiler
- Heatable. (n.d.). Electric Boilers Vs Gas Boilers: Pros & Cons. Retrieved from https://heatable.co.uk/boiler-advice/electric-vs-gas-boilers
- Aura Heating. (2021, October 4). The Pros and Cons of an Electric Boiler. Retrieved from https://auraheating.co.uk/the-pros-and-cons-of-an-electric-boiler/
- Adven. (2024, March 25). Exploring the Pros and Cons of Electric Boilers. Retrieved from https://adven.com/articles/exploring-the-pros-and-cons-of-electric-boilers/
- Atamate. (2021, October 21). Electric Combi Boilers – The Pros and Cons. Retrieved from https://www.atamate.com/atamate-news/electric-combi-boilers-the-pros-and-cons