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Products

Find your perfect boiler

Find your perfect boiler
iC Economiser combination

iC Economiser combination
iC Combination

iC Combination
iS System

iS System
iR Regular

iR Regular
Smart controls & thermostats

Smart controls & thermostats
Cylinders

Cylinders
Heat pumps

Heat pumps

Support & Advice

FAQs

Find an installer
Support Hub

Support hub
Product manuals

Product manuals
Troubleshooting

Troubleshooting
FAQs

FAQs
ATAG Zone app

ATAG Zone app
ATAG ONE Zone

ATAG ONE Zone
ATAG Cube

ATAG Cube
ATAG Roomstat

ATAG Room Thermostat
TADO v3

TADO v3
System Boiler Image

iS SYSTEM

Sealed system boiler

The iS System heats a hot-water cylinder and keeps several bathrooms running at once.

Download brochure
[1] With ATAG ONE Zone an A+ 98% heat rating can be achieved. An A 94% rating as standard.
Image of the inside of a boiler
ATAG only sells direct to accredited installers, keeping the price fair
Key Features
Lifetime guarantee on the heat exchanger
Five models available: 15, 18, 24, 32, and 40kW
Pair with one of our iSteel cylinders
Lifetime guarantee on the heat exchanger
Fits in a standard kitchen cupboard
Pair with one of our iSteel cylinders
Five models available: 15, 18, 24, 32, and 40kW
ErP A+ rating icon ErP A+ rating
A+ for heating with ONE Zone controls (A on its own)
Quiet in operation icon Quiet in operation
Across the boiler range.
Built-in expansion vessel icon Built-in expansion vessel
Saving space and energy.
Compatible icon Compatible
With our range of smart and thermostat controls.
Download brochure
Cylinders

ATAG iSteel cylinder range

for iS System and iR Regular boilers

Find out more

Controls & thermostats

A great choice in control for your heating and hot water

image of a man using an ATAG Room Stat
ATAG OneZone

ONE Zone

Effortless smart heating control for ultimate comfort and reduced home energy bills.

Find out more

ATAG Cube

Cube controller

Straightforward, programmable digital thermostat for simple, reliable, and fuss-free heating control.

Find out more

ATAG Room Stat

Programmable room stat

Classic, user-friendly design with flexible seven-day scheduling for reliable home comfort.

Find out more

ATAG Partner Installers

Gas Safe Register logo
Gas Safe Register logo

ATAG Partner Installers

We only work with Gas Safe Registered installers

Find an installer
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