In many older homes, back boilers were once a popular choice for heating systems. However, as technology has advanced, more efficient and space-saving options, such as combi boilers, have become prevalent. Converting from a back boiler to a combi boiler can offer numerous benefits, including improved efficiency, modernization, and space-saving. In this article, we will delve into the process of back-boiler to combi conversion, exploring its reasons, steps, costs, and environmental impact.
Introduction to Back Boiler and Combi Boiler Systems
What is a Back Boiler?
A back boiler is a heating device located behind a fireplace, typically hidden within the chimney breast. It provides hot water and central heating for the home and was commonly installed in houses built during the mid-20th century.
What is a Combi Boiler?
A combi boiler, short for combination boiler, is a compact and efficient heating system that provides both hot water and central heating on demand. Unlike traditional boilers, it does not require a separate hot water cylinder or cold-water tank, making it space-efficient.
Reasons for Conversion
Converting from a back boiler to a combi boiler is a popular choice for several reasons:
Efficiency
Combi boilers are renowned for their energy efficiency, as they heat water directly from the mains supply when needed. This eliminates the need for a hot water storage tank, reducing heat loss and energy wastage.
Space-saving
Combi boilers are compact units that can be installed discreetly in kitchen cabinets or utility rooms. By removing the need for separate hot water storage, they free up valuable space in the home, particularly in properties with limited room.
Modernization
Upgrading from a back boiler to a combi boiler brings the heating system into the 21st century, providing advanced features such as digital controls, programmable thermostats, and wireless connectivity for remote operation.
Assessing Viability
Before embarking on a back-boiler to combi conversion, it’s essential to assess the viability of the project:
Professional Inspection
A qualified heating engineer should conduct a thorough inspection of the existing back boiler and plumbing system to determine if conversion is feasible. They will assess the condition of the pipework, radiators, and chimney flue.
Plumbing and Heating System Evaluation
The layout and condition of the plumbing and heating system will influence the conversion process. Upgrading pipework and radiator valves may be necessary to accommodate the new combi boiler.
Steps for Conversion
Converting from a back boiler to a combi boiler typically involves the following steps:
Removal of Back Boiler
The existing back boiler and associated pipework are disconnected and removed from the fireplace. Care must be taken to ensure the chimney flue is properly sealed to prevent drafts.
Installation of Combi Boiler
A new combi boiler is installed in a suitable location, such as the kitchen or utility room. It is connected to the mains water supply and central heating system, with any necessary adjustments made to accommodate the new unit.
Upgrading Pipework
Old or corroded pipework may need to be replaced to ensure optimal performance and prevent leaks. The heating engineer will install new pipework as required, taking into account the layout of the property.
Testing and Certification
Once the installation is complete, the combi boiler is tested to ensure it is functioning correctly and safely. A Gas Safe registered engineer will issue a certificate to confirm compliance with building regulations.
Cost Considerations
The cost of converting from a back boiler to a combi boiler can vary depending on various factors:
Initial Investment
The upfront cost of purchasing and installing a combi boiler, including any necessary pipework modifications, can range from several thousand to tens of thousands of dollars, depending on the complexity of the project.
Long-term Savings
While the initial investment may seem substantial, combi boilers are more energy-efficient than back boilers, leading to lower utility bills over time. Additionally, their compact size reduces the need for maintenance and repairs.
Environmental Impact
Converting to a combi boiler can have positive environmental implications:
Energy Efficiency
Combi boilers consume less energy than traditional back boilers, resulting in reduced carbon emissions and a smaller environmental footprint. They operate only when hot water or heating is required, minimizing energy wastage.
Carbon Footprint Reduction
By upgrading to a more efficient heating system, homeowners can contribute to the global effort to combat climate change by reducing their household carbon emissions.
Maintenance and Servicing
To ensure the longevity and efficiency of a combi boiler, regular maintenance and servicing are essential:
Regular Checks
Homeowners should perform regular checks on their combi boiler, such as monitoring water pressure, checking for leaks, and bleeding radiators to remove trapped air.
Professional Servicing
It is recommended to schedule an annual service by a qualified heating engineer to inspect and maintain the combi boiler, ensuring it operates safely and efficiently.
Advantages of Combi Boilers
Combi boilers offer several advantages over traditional heating systems:
Instant Hot Water
Combi boilers heat water directly from the mains supply, providing instant hot water on demand without the need for a separate cylinder.
Space-efficient
With no requirement for a hot water storage tank or cold-water tank, combi boilers are ideal for properties with limited space, such as apartments or small houses.
Energy-efficient Heating
Combi boilers are highly efficient, as they only heat water when needed, reducing energy wastage and lowering utility bills.