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New Unvented Cylinder Installations
Superior Hot Water Performance with a New Unvented Cylinder
Fixed Price Installations
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Book In 3 Simple Steps...

1.
Select your chosen cylinder from our Indirect or Direct cylinder price pages

2.
A Master Gas London surveyor will check the information provided.

3.
Once date and installation is confirmed, our engineers will install your new unvented cylinder.
What Is a Direct and Indirect Cylinder?
A direct cylinder and an indirect cylinder are two types of hot water storage systems commonly used in households. The primary distinction is in how the water is heated and where the heat comes from.
A direct cylinder, also known as an unvented cylinder, is directly heated by an immersion heater or an electric element within the cylinder itself. It operates independently of the central heating system, providing hot water on demand. With a direct cylinder, hot water is delivered at mains pressure, resulting in strong water flow and increased water pressure for showers and tap
An indirect cylinder, also known as an unvented cylinder, on the other hand, depends on the central heating system to heat the water. It is connected to a boiler or another heat source, which heats the water indirectly through a coil or heat exchanger within the cylinder. The coil circulates the hot water from the central heating system, transmitting its heat to the water in the cylinder.
The choice between a direct and indirect cylinder depends on various factors such as available space, and existing heating infrastructure. Direct cylinders are suitable for properties without a central heating system. Indirect cylinders, on the other hand, are commonly used in properties with a central heating system already in place, as they can efficiently utilise the heat produced by the boiler.
We Install all Cylinder Types
At Master Gas London, we specialise in installing all cylinder types, including direct, indirect, vented and unvented cylinders. Our skilled team can advise on the ideal solution for your hot water needs. Whether it’s a residential or light commercial project, we deliver top-quality installations with attention to detail and adherence to industry standards.

Indirect Unvented Cylinders
Looking for a new indirect unvented cylinder? Master Gas London has got you covered.
We Only Install Quality Brands
At Master Gas London, we believe in providing our customers with the best. That’s why we exclusively install unvented cylinders from renowned and trusted brands such as Heatrae Sadia who manufacture the MegaFlo and Gledhill. By choosing Master Gas London for your new unvented cylinder installation, you can have confidence that your new cylinder will be reliable and built to last.

Direct Unvented Cylinders
Need a replacement direct unvented cylinder? Master Gas London has got you covered.
Detailed Itemised Quotes
At Master Gas London, we prioritise transparency in our new boiler installations. We believe in complete clarity, which is why we provide detailed itemised quotes for all our work. With us, once a quote is provided, the price remains fixed, ensuring there are no hidden costs or surprises along the way. Our new boiler installations are designed to be affordable and flexible, catering to various budgets.
MegaFlo Eco 210L Indirect
- Price Includes Materials and Installation
- Magnetic Scale Reducer Included
- 30 Year Cylinder Warranty Included
- Master Gas London 12 Month Warranty Included
- Disposal of old Cylinder and any Tanks Included
Unbeatable Quality
At Master Gas London, we pride ourselves on quality workmanship and our award winning aftercare service. We will not be beaten on quality, and we strive to exceed your expectations every time. Contact us today for new boiler installations and boiler replacements.
MegaFlo Eco 145L Direct
- Price Includes Materials and Installation
- Magnetic Scale Reducer Included
- 30 Year Cylinder Warranty Included
- Master Gas London 12 Month Warranty Included
- Disposal of old Cylinder and any Tanks Included
Our Guarantee
At Master Gas London, we take pride in our work and are dedicated to giving our clients the finest support we can. We provide a 12 month guarantee for all of our services, parts and workmanship.
Quality Hot Water Cylinder Installations
At Master Gas London, we are experts in delivering exceptional installations of high-quality hot water cylinders. Our dedicated team of skilled professionals is committed to providing top-tier service in every aspect.
We recognise the significance of a reliable and efficient hot water system to meet your needs. That’s precisely why we specialise in offering expert installations of premium hot water cylinders. Whether you require a cylinder replacement or a new installation, our extensive knowledge and expertise ensure precise and meticulous handling of the task at hand.
Who are our Engineers?
At Master Gas London, we only employ Gas Safe and G3 qualified engineers. Every engineer is highly experienced with a minimum of 5 years experience. All engineers have undergone thorough vetting to ensure that we only provide the best gas services in the UK.
Why choose us?
Fixed and Fair Pricing
Our fixed and fair pricing provides transparency and value to our clients. We offer detailed itemised quotes without any hidden costs or surprise charges. Our competitive rates ensure affordability without compromising on quality. Once your price is fixed it’s fixed.
Our passion is your satisfaction
At Master Gas London, our purpose is to provide an enjoyable, stress-free experience for every customer. Our team is committed to exceeding your expectations and leaving you with a smile.
Award winning after care
We pride ourselves on our award-winning aftercare service. We are dedicated to ensuring that our clients are satisfied with our work, and our team is always on hand to provide support and advice even after works are completed.
Upgrade to an Unvented Cylinder
- All Prices are Fixed
- All Prices Include Everything you need
- Book with our Simple Booking Form
- Select an Installation Date That Suits You
- We Attend and Install
- It's That Easy
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FAQ'S
At Master Gas London, we specialise in delivering top-quality hot water cylinder installations. Our expert technicians are dedicated to offering quality in all aspects of our service. We offer quality installations, utilise high-quality products, and ensure meticulous attention to detail to meet your hot water needs.
There are a few signs that indicate the need for cylinder replacement, such as inadequate hot water supply, frequent leaks or corrosion, unusual noises, or the age of the cylinder. Our team can assess your current system and provide recommendations based on its condition.
We install a wide range of hot water cylinders, including direct and indirect unvented cylinders and vented cylinders. We can help you choose the most suitable type based on your specific requirements and the existing heating infrastructure in your property.
The installation duration depends on various factors, including the complexity of the installation, the type of cylinder, and any additional modifications required. Our team will provide you with an estimated timeline during the assessment process, ensuring minimal disruption to your daily routine.
Our installers are highly qualified and experienced professionals. They possess the necessary certifications and training to carry out hot water cylinder installations safely and efficiently. We prioritise the skill and expertise of our team to ensure reliable and long-lasting installations.
Yes, we provide warranties on both the products we install and our installation workmanship. The specific warranty details will be discussed and outlined in your contract or agreement with us.
We specialise in upgrades and can assess your existing system to recommend the most suitable solution for your needs. Whether you require increased capacity, improved energy efficiency, or enhanced performance, we have the expertise to guide you through the upgrade process.
Scheduling an installation is easy! Simply fill out our installation form or contact our customer service team via phone or email, and they will assist you. We can even carry out a free site survey if required.