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Last updated on December 13th, 2023 at 11:48 am

Boilers work by heating water, which is then circulated through pipes and radiators to provide warmth and hot water in your home. Although most homes have a boiler, many homeowners have no idea how their boiler works. Understanding how your boiler works and how to use it efficiently can save you money and ensure your home remains comfortable.

Most (90%) English homes have a boiler system with radiators as their main heating system. In this guide, we explore the way boilers work, discussing the various types and essential controls, so you can make the most of this essential household appliance.

Types of Boilers

Boilers come in different shapes and sizes, but three main types are commonly used: combi boilers, conventional boilers, and system boilers.

1. Combi Boilers

Overview: Combi, short for combination, boilers are the most prevalent type in modern homes. They are known for their simplicity and space-saving design. Combi boilers heat water on demand, eliminating the need for a storage tank.

Advantages:

  • Energy Efficiency: Combi boilers are highly energy-efficient, as they only heat the water you use, saving you both energy and money.
  • Space-Saving: Their compact size makes them suitable for homes with limited space.

2. Conventional Boilers

Overview: Conventional boilers, also known as regular boilers, use two water tanks – one for mains water supply and another for storing heated water. They are more complex and larger than combi boilers.

Advantages:

  • Hot Water Storage: Conventional boilers store hot water in a cylinder, ensuring a steady supply.
  • Suitable for Larger Homes: Ideal for homes with multiple bathrooms and high hot water demands.

Drawbacks:

  • Space Requirement: Conventional boilers take up more space than combi boilers.
  • Less Energy Efficient: As they store hot water, energy can be wasted if not used promptly.

3. System Boilers

Overview: System boilers, like combi boilers, draw water directly from the mains. However, they store the hot water in a tank, striking a balance between combi and conventional boilers.

Advantages:

  • Hot Water on Demand: They provide hot water as needed, eliminating the need for a storage tank.
  • Less Space: System boilers require less space than conventional boilers.

Boiler Controls and How to Use Them

Understanding your boiler’s controls is crucial for efficient operation. Let’s explore the common controls found on gas-powered boilers:

1. Pressure Gauge

Purpose: The pressure gauge measures the water pressure within the system.

Optimal Pressure: The gauge should reach a specific mark to ensure efficient heating. If it’s too high, bleeding radiators can reduce pressure. If too low, you might have air in the system or a leak.

2. Power Switch/Button

Purpose: Used to turn the boiler on and off. Boilers are designed to stay on for extended periods, but you can use this switch when going away for an extended period.

3. Central Heating Dial

Purpose: Controls the temperature of the water in your central heating system. Typically, it’s set high, with thermostats around the house regulating when the boiler operates.

4. Eco Button

Purpose: Some boilers feature an ‘eco’ button that prevents preheating of hot water pipes. This conserves energy, but you may experience a short delay in getting hot water.

Maintaining Your Boiler

Regular boiler maintenance is essential to ensure it operates efficiently and safely. Consider these steps:

  • Boiler Service: Schedule annual boiler servicing to identify and address potential issues.
  • Upgrading: Older boilers may benefit from replacement with more energy-efficient models.
  • Exploring Alternatives: Consider energy-efficient options like air source heat pumps or modern electric heaters.

Boiler Services

Lastly, to safeguard your home from unexpected boiler breakdowns, consider boiler services. It provides peace of mind by covering regular servicing and sending certified engineers when issues arise. You can even consider an annual boiler service to make sure you get ahead of any problems before they happen. Warmable offers a complementary boiler quote in which we send a trusted local engineer to your home. Apply today.

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Andrew Speer

Andrew Speer is the co-founder of Warmable drawing on more than 15 years of experience working in property and home repairs industry in the UK