Purchase a System Boiler with Installation Included. Discover our detailed System Boiler Guide for expert insights and personalised recommendations. With clear pricing, professional installation, and exceptional service, we guarantee a hassle-free experience.
A system boiler might be the ideal choice if you need a heating system that delivers consistent central heating and provides a stored supply of hot water. But what exactly are system boilers? This guide will help you understand everything you need to know about system boilers, including their history, efficiency, advantages, and disadvantages.
If you’re considering upgrading to a System Boiler, check out our pages on New Boiler Cost, Boiler Types, and Which Vaillant Boiler to find the best option for your home.
Get a New Vaillant Boiler Installation with 10 year Parts & Labour Warranty Included
Get a New Worcester Bosch Boiler Installation with up to 12 years Parts & Labour Warranty Included
Get a New Baxi 800 Boiler Installation with 10 year Parts & Labour Warranty Included
Get a New Glow Worm Boiler Installation with up to 10 years Parts & Labour Warranty Included
A system boiler operates similarly to a conventional boiler but removes the necessity for a separate cold water tank and expansion tank when paired with an unvented cylinder. Featuring a sealed system design, it enhances energy efficiency and minimizes fuel consumption. System boilers deliver rapid and uniform heating, particularly when used with unvented cylinders. Ideal for larger properties, they guarantee an abundant supply of hot water.
System boilers have evolved significantly, transforming heating technology for greater efficiency and convenience. In the past, gravity-fed hot water systems were common, but they were inefficient and required extensive pipework. The introduction of sealed system boilers in the late 20th century revolutionised the industry by eliminating the need for a separate cold water tank, providing a more efficient heating solution. With advanced controls and technology, system boilers now enhance heating efficiency and reduce fuel consumption.
For more information on upgrading to a modern, efficient new boiler, explore our New Boiler Installation page.
System boilers deliver exceptional efficiency, making them an excellent choice for both residential and commercial applications. Their sealed system design significantly minimises heat loss, ensuring optimal performance. Additionally, system boilers can seamlessly integrate with smart technology, including smart thermostats, to enhance energy efficiency further. By utilising advanced controls, they effectively lower fuel consumption, resulting in reduced energy costs and a more sustainable heating solution compared to conventional boilers.
Considering upgrading to a more efficient heating system? Explore our Full Central Heating Installations to optimise your home’s heating efficiency.
Make sure you choose a System boiler that's the right size for your home and your hot water needs
Annual Servicing is Required
Choose a reputable brand with a good track record for reliability and performance such as Worcester Bosch, Vaillant, Baxi or Glow Worm.
System boilers offer efficient heating and fast hot water delivery, making them an excellent choice for many homes and businesses. With their design, enhanced energy efficiency, and convenient hot water supply, system boilers provide reliable heating solutions.
While air source heat pumps boast higher efficiency, they come with a significantly higher price tag and often require property upgrades.
It’s important to consider the initial cost and hot water cylinder size before making a decision. Consult a professional heating engineer from Master Gas London for expert advice and installation services tailored to your requirements.
For expert advice and installation, explore our pages on Combi Boiler Conversions, Hydrogen Ready Boilers, or Air Source Heat Pumps.
When it comes to selecting the best combi boiler for your home, several reputable brands stand out, including Vaillant boilers, Worcester Bosch boilers, Baxi boilers, and Glow-worm boilers. Each of these brands offers a range of high-quality combi boilers known for their efficiency, reliability, and durability.
A system boiler is a type of central heating boiler that stores hot water in a cylinder and provides heating to your home. Unlike regular boilers, system boilers do not require a cold water tank, making them ideal for homes with limited space.
A system boiler heats water and stores it in a hot water cylinder. When you turn on the hot water tap, the stored hot water flows directly to the tap, providing a consistent supply of hot water while simultaneously heating the home.
System boilers offer several benefits, including higher efficiency, a steady supply of hot water for multiple outlets, reduced installation time, and the ability to work with existing heating systems.
Yes, system boilers are generally very energy-efficient. Many modern models have an efficiency rating of over 90%, which can help reduce energy bills by using less fuel to produce heat.
08/01/24
Tam and his team, great price, great installation , clean tidy, great after care. Most of all Nice people. Vaillant Ecotec Plus. Rad installed.In the words of Tina Turner “simply the best”
05/01/24
Installed a new boiler for us in 2022. New Year’s Eve 2023 we had an unrelated problem with our Co2 alarm, Ed called me, then came round to check everything was fine – fantastic service and we were so grateful!
12/11/23
We had a boiler replaced. The team were amazing from quotation to installation. The new boiler was installed in a day. The house was left tidier than when they arrived. Highly recommended.
03/01/24
19/10/23
Referred to this amazing company Master Gas London as l needed to replace an old boiler. I contacted them, in a couple of days, surveyed, detailed quote with recommendations, and installation arranged.
21/12/23
New boiler, replacement of leaking underfloor heating manifold, rerouting overflow pipe, improved piping in cellar – all completed to a high standard in one day. Thanks!
18/11/23
Highly recommend Master Gas for any boiler issues. They came and fitted a new boiler quickly and at a fair price & were a pleasure to have in the house. Highly recommend.
A system boiler is a type of central heating appliance that provides both heating and hot water for your home or business. It works alongside a hot water cylinder, ensuring a constant supply of hot water to multiple outlets simultaneously.
Unlike conventional boilers, system boilers do not require a separate cold water or expansion tank. They have a built-in expansion vessel and operate with a sealed system, which improves efficiency and eliminates the need for a loft or attic space to accommodate a cold water tank.
Yes, system boilers are known for their energy efficiency. The sealed system design minimizes heat loss, ensuring efficient heating and hot water delivery. Additionally, many system boilers incorporate advanced controls and technology to optimise energy usage and reduce fuel consumption.
Yes, system boilers work best alongside unvented cylinders. Unvented cylinders are pressurised, allowing for higher flow rates and more efficient hot water delivery. When combined with a system boiler, they ensure a consistent supply of hot water to multiple outlets simultaneously.
The size of the system boiler required depends on various factors, including the size of your property and your hot water demands. It is best to consult with a heating engineer or professional installer who can assess your needs and recommend the appropriate boiler size.
The installation time for a system boiler can vary depending on the complexity of the project. On average, a system boiler installation can take a day. However, this can be longer depending on the specific circumstances of your property.
Like any heating appliance, system boilers require regular maintenance to ensure optimal performance. It is recommended to have your system boiler serviced annually by a qualified heating engineer. Routine maintenance helps identify and resolve any potential issues before they become major problems.
In many cases, it is possible to replace an existing boiler with a system boiler. However, the feasibility will depend on the specific circumstances of your heating system and property. It is best to consult with a heating engineer or professional installer to determine the compatibility and requirements for a system boiler replacement.
