New Unvented Cylinder Installations From £1395

Unlock reliable hot water supply with a new unvented cylinder installation starting from £1395. Master Gas London offers expert installation services for unvented cylinders, ensuring efficient and hassle-free solutions for your home. 

Unvented cylinder installation

Unvented Cylinders: The Complete Guide

Welcome to the Master Gas London comprehensive guide for unvented cylinders. Unvented cylinders are an increasingly popular choice for domestic hot water systems due to their efficiency and convenience. We will cover everything you need to know about unvented cylinders in this guide, including an overview, history, efficiency, pros and drawbacks, items to think about, and a summary to help you make an informed decision.

Unvented Cylinder Prices

Direct unvented cylinder prices with installation included

Direct Cylinders
From £1395

Direct Unvented Cylinder Prices include installation from Only £1395

Direct Unvented cylinder prices all include installation

Indirect Cylinders
From £1499

Indirect Unvented Cylinder Prices include installation from only £1499

About Unvented Cylinders

Unvented cylinders are a type of hot water storage system that operates at mains pressure. Unlike traditional vented cylinders, unvented cylinders are directly connected to the mains water supply, eliminating the need for a cold-water storage tank in the loft. They are typically made of stainless steel and can store a significant amount of hot water for domestic use.

History of Unvented Cylinders

Unvented cylinders were first introduced in the UK in the late 1980s. They were developed to overcome the limitations of traditional vented systems and provide a more efficient and reliable solution for supplying hot water. Since then, advancements in technology and strict safety regulations have made unvented cylinders a popular choice for homeowners.

Efficiency of Unvented Cylinders

Unvented cylinders offer excellent efficiency in providing hot water. The high-pressure water supply ensures that water is delivered at a consistent flow rate and temperature throughout the property, regardless of multiple outlets being used simultaneously. This eliminates the issue of reduced water pressure experienced in vented systems. Additionally, unvented cylinders are well-insulated, minimising heat loss and ensuring that hot water is readily available whenever needed.

Pros of Unvented Cylinders

High Water Pressure

Unvented cylinders deliver water at mains pressure, ensuring powerful showers and fast-filling baths.

Improved Efficiency

With no need for a separate cold water tank, unvented cylinders save space and reduce heat loss, resulting in improved energy efficiency.

Faster Heating

Unvented cylinders heat water directly from the mains, providing quicker access to hot water compared to traditional systems.

Cons of Unvented Cylinders


Unvented cylinder installations require careful planning and professional expertise due to the need for safety features and compliance with building regulations.

Initial Cost

Unvented cylinders typically have a higher upfront cost compared to traditional vented systems, including the need for safety devices and professional installation.

Maintenance Requirements

Regular maintenance is essential to ensure the continued safety and performance of unvented cylinders, including annual safety checks and servicing.

Unvented Cylinder Installations From £1395

Unvented cylinder

Unvented Cylinder Deals
From £1395

Our all-inclusive packages cover everything you need, including professional installation.

Things to Consider

Hot Water Demand

Consider your household’s hot water usage patterns and the number of bathrooms and appliances that require hot water to ensure the unvented cylinder capacity meets your needs.

Space Availability

Assess the available space for installation, considering both the size of the cylinder and the necessary clearance requirements for safe operation and maintenance.

Water Pressure

Ensure that your property has sufficient water pressure and flow rate to meet the requirements for an unvented cylinder. Check the minimum recommended bar and flow rate specified by the manufacturer.

Budget and Cost

Evaluate the upfront cost of purchasing and installing the unvented cylinder, including any additional expenses such as pipework modifications or electrical upgrades, to ensure it aligns with your budget.

Summary of Unvented Cylinders

Unvented cylinders offer efficient hot water solutions for homes, delivering mains pressure and improved efficiency. Consider upfront costs, installation needs, and professional maintenance. Consult with a qualified installer to assess your requirements and ensure safety compliance.

Brands we Install...

Enhance your hot water system with Master Gas London’s Unvented Cylinder installations. We specialize in top brands like Heatrae Sadia (Megaflo), Gledhill, Baxi, and Vaillant. Our G3 registered engineers guarantee quality installations for an efficient hot water experience. Count on us for expert service – reach out to schedule your Unvented Cylinder installation and experience the Master Gas London difference.

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What Our Customers Say...


An unvented cylinder is a hot water storage system that operates at mains pressure. It is directly connected to the mains water supply and does not require a cold-water storage tank.

An unvented cylinder is filled with cold water from the mains supply, which is then heated using an immersion heater or connected to a boiler. The hot water is stored under pressure and distributed to various outlets throughout the property.

Yes, unvented cylinders are designed with safety in mind. They incorporate various safety features such as pressure relief valves, temperature controls, and expansion vessels to ensure safe operation and prevent the risk of overheating or explosion.

Yes, the installation of an unvented cylinder must be carried out by a G3 qualified and certified professional. They have the expertise to ensure proper installation, compliance with safety regulations, and integration with the existing heating system.

In most cases, unvented cylinders can be installed in a wide range of properties. However, it’s essential to assess the available space, water pressure, and suitability of the property. Consulting with a professional installer is recommended to determine feasibility.

Yes, unvented cylinders can be used in conjunction with combi boilers, providing additional hot water storage and maintaining mains pressure for efficient water delivery.

Unvented cylinders require periodic maintenance, including safety checks and servicing. It is recommended to have a qualified professional carry out these tasks to ensure the system’s optimal performance and safety.

Yes, unvented cylinders can be integrated with renewable energy systems such as solar thermal systems or heat pumps to maximise energy efficiency and reduce reliance on traditional heating methods.