ATAG iSteel Vented Cylinders

The ATAG iSteel Vented Cylinder range are a modern, durable replacement for traditional copper hot water storage systems. These cylinders offer a solution for homes that require a vented setup while benefiting from the latest in cylinder design.

Available in both direct and indirect models, the iSteel vented range provides flexibility across a wide range of domestic applications. With sizes ranging from 85 to 260 litres, you can choose the capacity that best matches your home’s hot water needs. Whether you’re replacing an older cylinder or installing as part of a new heating system, there’s a size and model to suit your layout.

Each iSteel Vented Cylinder are made from high-grade stainless steel, offering a robust and reliable alternative to traditional copper units. Stainless steel construction ensures a long service life while reducing the risk of internal corrosion over time.

These cylinders are designed with convenience in mind. A built-in secondary return feature helps maximise hot water delivery, ensuring your system performs efficiently and meets household demand. The ‘C’ banding ErP rating demonstrates strong energy performance, helping to support lower energy consumption.

Installation is straightforward. Designed to meet the requirements of modern installers, iSteel Vented Cylinders are Part L compliant and engineered for ease of setup. That makes them a suitable fit for homes that want to upgrade without overcomplicating the process.

Every cylinder in this range is backed by a 10-year guarantee, offering added peace of mind and assurance of quality.

To explore available sizes and models or to speak with your local installer, contact an ATAG Selected Partner.

Key features and benefits

  • Robust and reliable
  • Built-in secondary return for maximum hot water deliver
  • Efficient Erp ‘C’ banding
  • Easy to install
  • Part L compliant
  • 10 year guarantee

Specification

The table represents the technical information for the cylinder part number.

Cylinder type Actual size of vessel Capacity ERP Energy efficiency class Part number
ISTEEL VENTED INDIRECT CYLINDER 900 X 375 I 845 X 445 85L C CY300085
ISTEEL VENTED INDIRECT CYLINDER 900 X 400 I 816 X 470 98L C CY300098
ISTEEL VENTED INDIRECT CYLINDER 1050 X 400 I 940 X 470 116L C CY300116
ISTEEL VENTED INDIRECT CYLINDER 900 X 450 I 812 X 520 120L C CY300120
ISTEEL VENTED INDIRECT CYLINDER 1050 X 450 I 937 X 520 144L C CY300144
ISTEEL VENTED INDIRECT CYLINDER 1200 X 375 I 1149 X 445 116L C CY400116
ISTEEL VENTED INDIRECT CYLINDER 1200 X 450 I 1060 X 520 166L C CY300166
ISTEEL VENTED INDIRECT CYLINDER 1500 X 450 I 1360 X 520 210L C CY300210
ISTEEL VENTED INDIRECT CYLINDER 1800 X 450 I 1614 X 520 260L C CY300260
ISTEEL VENTED DIRECT CYLINDER 900 X 375 D 845 X 445 85L C CY100085
ISTEEL VENTED DIRECT CYLINDER 900 X 400 D 816 X 470 98L C CY100098
ISTEEL VENTED DIRECT CYLINDER 1050 X 400 D 940 X 470 116L C CY100116
ISTEEL VENTED DIRECT CYLINDER 900 X 450 D 812 X 520 120L C CY100120
ISTEEL VENTED DIRECT CYLINDER 1050 X 450 D 937 X 520 144L C CY100144
ISTEEL VENTED DIRECT CYLINDER 1200 X 375 D 1149 X 445 116L C CY200116
ISTEEL VENTED DIRECT CYLINDER 1200 X 450 D 1060 X 520 166L C CY100166
ISTEEL VENTED DIRECT CYLINDER 1500 X 450 D 1360 X 520 210L C CY100210
ISTEEL VENTED DIRECT CYLINDER 1800 X 450 D 1614 X 520 260L C CY100260
1

Boilers

ATAG boilers are efficient, reliable and easy to install.

Find out more
2

Not sure which boiler you need?

Our boiler finder will help you to choose the perfect boiler for your home.

Find your perfect boiler
3

Controllers

We have a range of controllers to suit different requirements

View all Controllers

Installers that you can depend on

From design through to installation and after-care service, our ATAG selected gas-safe installers are on hand to offer you excellent advice and the best solution possible that suits your needs.

Find an Installer