At Aizo, we know how important it is to get hot water solutions right — both for performance and long-term reliability. That’s why we offer a carefully selected range of unvented stainless steel cylinders from the best brands in the market, including trusted names like EHC.
These cylinders are essential in modern plumbing and heating setups. They provide a high-pressure, consistent hot water supply and eliminate the need for loft tanks, making them ideal for everything from compact homes to larger, multi-bathroom properties.
Why Choose Unvented Stainless Steel Cylinders?
Unvented cylinders connect directly to the mains, delivering powerful flow rates to taps and showers across the property — even when used simultaneously. They're space-saving, energy-efficient, and built for durability, making them a go-to solution for installers who want to provide a long-lasting upgrade to traditional vented systems.
At Aizo, we only work with high-performance models from top-tier manufacturers to ensure our customers — and their end clients — get the best results with every installation.
Key Advantages of the Cylinders We Offer
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Mains Pressure Hot Water
Strong, reliable flow for simultaneous use across multiple outlets. -
No Cold Water Tank Required
Save space and simplify the install — perfect for modern properties. -
Energy Efficiency
All our models are highly insulated and compliant with the latest energy standards. -
Long-Term Durability
Stainless steel construction for corrosion resistance and fewer service issues. -
Built-in Safety Features
Includes pressure and temperature relief valves and expansion vessels, as standard. -
Installation Flexibility
We stock a range of sizes and configurations to suit different project types, including horizontal models and solar-compatible variants.
Whether it’s a small residential upgrade or a large-scale fit-out, we help installers find the right cylinder for the job — with no compromise on quality.
Installation Tips for Installers
Working with the right cylinder is only half the job — smart installation is where real performance happens. Keep these essentials in mind:
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Verify Mains Pressure: Ensure adequate water pressure is available (typically above 1.5 bar) before installation.
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Choose Accessible Placement: Install in a location that allows for safe operation and future servicing.
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Follow Safety Guidelines: Fit expansion vessels and safety valves exactly as specified by the manufacturer.
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Use a Qualified Electrician: All electrical connections should be completed by a certified professional and comply with local regulations.
We recommend working closely with technical data sheets and manufacturer instructions — which we provide for every model we sell — to ensure flawless installation.
Choosing the Right Model for the Project
We help you select the right model based on:
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Capacity:
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120–150L for flats and 1-bed homes
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180–210L for standard family homes
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250L+ for larger homes or high-demand usage
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Usage Requirements:
Consider the number of bathrooms, peak usage times, and pressure needs. -
Special Features:
Many of our models include solar compatibility, twin coils, or immersion heaters for backup. -
Space Constraints:
Need a low-height unit for under-stairs or loft install? We’ve got you covered.
Our team is here to assist installers and specifiers with expert advice on selecting the perfect product for every project.
Final Thoughts: Why Aizo?
At Aizo, we don’t just stock cylinders — we curate high-performance products trusted by professionals. We partner with leading manufacturers like EHC to offer you a reliable, high-quality range that meets the demands of today’s heating systems.
Whether you’re a professional installer, a specifier, or a property developer, we help you deliver top-tier hot water solutions that work — safely, efficiently, and for the long term.
Explore our full range of unvented stainless steel cylinders from the best brands in the industry and get expert support every step of the way.