Busting Common Boiler Myths 2025 - Facts Vs Misconceptions

Busting Common Boiler Myths

Key takeaways

Upgrading to a modern boiler can save you hundreds of pounds a year on your heating bills.
Modern boilers are designed to be efficient, quiet, and safe, providing optimal comfort in your home.
While cheaper boilers might seem like a good deal, they often cost more in the long run due to higher repair and maintenance needs.
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We understand that not everyone is a boiler expert, and despite the at times confusing appliance market, of course you want your property to be heated as efficiently and as cost effectively as possible.

Choosing the right boiler for your home can be a bit overwhelming, especially with so many different options on the market.

At iHeat, we know how important it is to keep your home comfortable while being mindful of energy costs.

We’re here to help clear up any confusion and debunk some of the most common myths surrounding boilers, so you can make an informed decision for your home’s heating needs.

Common Boiler Myths

Myth 1: Boilers Are Inefficient and Expensive to Run

This myth may have been true in the past, but modern combi and system boilers are designed to be highly efficient. In fact, many of today’s boilers have an ErP efficiency rating of A (90%+). By upgrading from an older, less efficient boiler, you could save up to £420 a year on your heating bills!

Age of Boiler | Efficiency Percentage | Efficiency Rating (ErP)

0+ years: 90%+ | A
10+ years: 85%+ | B/C
15+ years: 80%+ | C/D
20+ years: 70%+ | E/F
25+ years: 60%+ | G

This chart clearly shows how a boiler’s efficiency declines with age. A modern boiler can help you reduce your carbon footprint and energy consumption, providing long-term savings.

Myth 2: Boilers Are Difficult to Maintain

Modern A-rated boilers are built to be reliable and durable, with high-quality components designed to last. The maintenance required is minimal, just an annual service by a qualified Gas Safe registered engineer. These regular checks help catch potential issues early and ensure your boiler continues to run efficiently.

If you don’t already have an annual service booked, it's a good idea to schedule one. Keeping your boiler in top condition is essential for maintaining its performance and longevity.

Myth 3: Boilers Are Noisy

Gone are the days of noisy, clanging boilers. Today’s boilers are designed with quiet operation in mind, and many premium brands have earned Quiet Mark awards for their minimal noise levels. Modern systems are so quiet that you’ll hardly even notice they’re on, making them ideal for homes where peace and quiet are a priority.

If you’re worried about noise, rest assured that a modern boiler won’t disrupt your comfort. Whether it’s for a home office, living room, or bedroom, modern boilers are designed to run silently in the background.

Myth 4: Boilers Are Unsafe

This myth is far from the truth. All modern boilers undergo stringent safety testing to meet the highest safety standards. They come with multiple built-in safety features, such as automatic shut-off systems, pressure release valves, and carbon monoxide detection, which protect you and your home.

Having your boiler serviced annually by a Gas Safe registered engineer is the best way to ensure your boiler remains safe and operates smoothly. If you ever have concerns about your boiler, don’t hesitate to call a professional. For emergencies, you can always contact the National Gas Emergencies number: 0800 111 999.

Myth 5: Boiler Installations Are Difficult

Installing a new boiler doesn’t have to be a stressful experience. The installation process is straightforward when handled by a qualified Gas Safe registered engineer. Most installations take just 1-2 days, depending on the type of boiler and the complexity of the system.

The only thing you need to do is ensure the area where the boiler is being installed is clear and clean. Your engineer will take care of the rest. A good installation ensures your boiler runs efficiently, maximising its lifespan and performance.

Myth 6: Boilers Are Expensive

While premium boilers tend to have a higher upfront cost, they are a worthwhile investment. Modern, efficient boilers save you money in the long run by reducing your energy bills. A new boiler could save you up to £420 a year on heating costs, making it a cost-effective choice in the long run.

On the other hand, cheaper boilers might seem attractive initially, but they often lead to higher repair and maintenance costs. In some cases, you may find yourself needing to replace a low-budget boiler sooner than you would a high-quality, energy-efficient model.

Conclusion

When it comes to heating your home, a modern, energy-efficient boiler is the way to go. Not only will it save you money on your energy bills, but it will also keep your home comfortable and safe. Whether you’re upgrading from an old system or installing a new one, the benefits of a modern boiler are clear.

At iHeat, we offer hassle-free fixed-price quotes and flexible financing options to make it easier than ever to upgrade your boiler. With our professional installation and expert advice, you can enjoy peace of mind knowing your home’s heating system is in good hands.

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Frequently Asked Questions

How likely is my boiler to explode?

It's very unlikely that your boiler will explode, as modern boilers are designed with multiple safety features, such as pressure relief valves and automatic shut-off mechanisms, to prevent this from happening. However, improper maintenance or faults, such as over-pressurisation or corrosion, can increase the risk of dangerous situations. Regular servicing helps mitigate this risk.

What would cause a boiler to explode?

A boiler explosion is most commonly caused by excessive pressure build-up or a malfunctioning safety valve. Other factors include low water levels, blockages in the system, or internal corrosion, which could cause the boiler to overheat. Ensuring proper maintenance and timely repairs will significantly reduce this risk.

Is it cheaper to leave your heating on low all day?

Leaving your heating on low throughout the day can be more energy-efficient in a well-insulated home, as it maintains a steady temperature without the system needing to work harder to heat the space back up. However, if you’re out of the house for long periods, it’s better to turn it off or use a timer to save on energy costs.

What is the biggest cause of boiler breakdown?

The primary cause of boiler breakdowns is a lack of regular maintenance. Over time, components such as the pump, heat exchanger, or valves can deteriorate or become clogged. Scheduling annual check-ups with a qualified engineer can catch small issues before they escalate into more significant and costly problems.

What is the most common cause of boiler failure?

Low water pressure is one of the most common causes of boiler failure. This can result from a leak in the system, a faulty valve, or simply not topping up the pressure regularly. Monitoring the pressure gauge and ensuring it stays within the recommended range will help avoid this issue.

What is the most common boiler fault?

Low water pressure is the most frequent fault found in boilers. This issue can be caused by a leak, a broken pressure valve, or air trapped in the system. Checking the pressure gauge regularly and topping up as necessary is a simple way to prevent this fault from causing major problems.

What 3 things could cause a boiler to trip?

Low water pressure, a blocked flue, and a faulty thermostat are the three most common reasons a boiler might trip. Low pressure causes the boiler to shut down to protect the system. A blocked flue can cause overheating, and a broken thermostat can prevent the boiler from reaching the required temperature, all triggering a safety shutdown.