Brands Products

ATAG iS System Boilers

( 21 Reviews )

We are currently unable to show all models available.

New purchasing options coming soon, please check back another time.

The ATAG iS System Boilers

• This model ranges from an output of 15kW to 40kW.
• ATAG iCon stainless steel heat exchanger – with its unique lifetime replacement guarantee
• Factory fitted ErP-ready pump for low electrical consumption and improved efficiency
• A wide modulation range on the iS System boilers delivers significant savings
• Built-in Expansion Vessel for ease of installation
• Built-in frost protection for increased reliability
• Built-in anti-cycling function for improved efficiency
• Wall fixing jig for quick and simple Installation
• Combined condensate and pressure relief valve outlet pipe, so less pipework to be installed
• Fully compatible with ATAG iSol solar thermal hot water system and ATAG iSteel Cylinder Range

About ATAG:
All ATAG boilers are built to last using the highest quality stainless steel and brass components. Not only are they the most energy efficient boilers in Europe, they also have the lowest NOx emissions meaning they’re kinder to the environment.

  • Build Quality is rated at a 5/5 for ATAG iS System Boilers :

  • Easy of Use is rated at a 5/5 for ATAG iS System Boilers :

  • Features is rated at a 5/5 for ATAG iS System Boilers :

  • Value For Money is rated at a 5/5 for ATAG iS System Boilers :

  • Overall is rated at a 5/5 for ATAG iS System Boilers :

This product has 21 trade Reviews

This product has 0 trade Questions

This product has 0 trade Video Reviews

21 Results

0 Results

0 Results

Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by C Brookes Plumbing & Heating
6th February 2020

Really great boiler although slightly on the larger size. Brilliant amount of parameters that can be altered to ensure the system is running efficiently. Backup is a concern though so i currently don't offer this as an option.

Really great boiler although slightly on the larger size. Brilliant amount of parameters that can be altered to ensure the system is running efficiently. Backup is a concern though so i currently don't offer this as an option.


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Matthews Heating Ltd
21st September 2019

I am fitting alot of atag boilers at the moment and love fitting them. I am also doing alot of the 1st year services and they are a dream to service and the customers seem to love them.

I am fitting alot of atag boilers at the moment and love fitting them. I am also doing alot of the 1st year services and they are a dream to service and the customers seem to love them.


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Darren Russell Plumbing & Heating
20th June 2019

Very well built boilers with good range of solutions to comply with boiler plus. They only sell to gas safe registered businesses and the training is brought to you which is very handy. The products are fairly priced to allow for a fair mark up. The after sales are really proactive and local reps always on hand if a problem arises.

Very well built boilers with good range of solutions to comply with boiler plus. They only sell to gas safe registered businesses and the training is brought to you which is very handy. The products are fairly priced to allow for a fair mark up. The after sales are really proactive and local reps always on hand if a problem arises.


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by BoilerOne
17th June 2019

Replaced an old back boiler with a system Atag. Excellent boiler, A rated efficiency, engineered very well. Atag Customer aftercare is second to none so more than happy to install these in the future

Replaced an old back boiler with a system Atag. Excellent boiler, A rated efficiency, engineered very well. Atag Customer aftercare is second to none so more than happy to install these in the future


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Glennon plumbing services ltd
30th November 2018

Fitted my first is40 this week, very impressive boiler, easy to install very fast delivery, looks very easy to service and it’s great the fact you get upto 45 days to pay your invoice for the boiler. Slight down sides are the fact the vessel is behind the jig and the built in dials look very basic (customers comment) but I’ve just heard they’re changing that in January for much sleeker looking and easy to use interface in January.

Fitted my first is40 this week, very impressive boiler, easy to install very fast delivery, looks very easy to service and it’s great the fact you get upto 45 days to pay your invoice for the boiler.
Slight down sides are the fact the vessel is behind the jig and the built in dials look very basic (customers comment) but I’ve just heard they’re changing that in January for much sleeker looking and easy to use interface in January.


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Tim beard plumbing & heating services
30th June 2018

Fitted two of the Atag boilers one heat only and one combination boiler The Heat only i used a mains link to up the pump

Fitted two of the Atag boilers one heat only and one combination boiler

The Heat only i used a mains link to up the pump


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by S Court Plumbing
30th June 2018

Best boiler on the market by a long Long way. Great company who look after the customer and reps that come out very quickly to sort the few issues they have. Donated a boiler on a BBC DIY SOS for no gains to themselves.

Best boiler on the market by a long Long way. Great company who look after the customer and reps that come out very quickly to sort the few issues they have. Donated a boiler on a BBC DIY SOS for no gains to themselves.


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Ultimate Plumbing and Heating Services
12th May 2018

Excellent boiler easy to install and setup. Only sell to gas safe engineers and the backup is excellent

Excellent boiler easy to install and setup. Only sell to gas safe engineers and the backup is excellent


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Mb plumbing & heating
23rd February 2018

Love these boilers. Easy to install and berry reliable with excellent backup if needed. Like the fact that they only sell to gas safe engineers as well

Love these boilers. Easy to install and berry reliable with excellent backup if needed. Like the fact that they only sell to gas safe engineers as well


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by A Lewis Plumbing & Heating
10th December 2017

great boiler great company great back up and support from Atag have fitted a few of these love them. Stainless steel hx weather compensate standard 10 year warranty out of box no having to fit there filters or clocks to extend warranty

great boiler great company great back up and support from Atag have fitted a few of these love them.
Stainless steel hx
weather compensate standard
10 year warranty out of box no having to fit there filters or clocks to extend warranty


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by RJM Multi Trade Ltd T/A Bog Standard Plumbing
7th December 2017

Fitted my first IS last month complete with the Atag 3 port valve kit. So simple to install, wiring centre very simple. Easy to operate and the normally Atag quality glad to be a select partner hoping to fit more

Fitted my first IS last month complete with the Atag 3 port valve kit.
So simple to install, wiring centre very simple. Easy to operate and the normally Atag quality glad to be a select partner hoping to fit more


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Ethos Heating Ltd
14th October 2017

Excellent product Been fitting lots this year goes well with the atag mag filter

Excellent product Been fitting lots this year goes well with the atag mag filter


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Flow Rate Ltd
23rd September 2017

Great boilers, great company. Stainless Steel heat exchanger that cleans itself. The designers of these boilers have really took the time to think about every aspect of what goes where for easy maintenance and servicing, using Stainless steel and brass components to give us the most solid, efficient boiler on the market which is built to last. I am happy knowing that I can supply one best boilers on the market. Great for business, great to represent your brand.

Great boilers, great company. Stainless Steel heat exchanger that cleans itself.
The designers of these boilers have really took the time to think about every aspect of what goes where for easy maintenance and servicing, using Stainless steel and brass components to give us the most solid, efficient boiler on the market which is built to last.
I am happy knowing that I can supply one best boilers on the market.

Great for business, great to represent your brand.


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Breeden Heating and Plumbing Ltd
26th June 2017

I personally think ATAG are the best all round boiler brand, with larger brands the installer gets lost amongst figures and targets. I seem to get a more personal touch with the ATAG staff! As for the boiler i have sold a few now. And all customers seem to be very happy. Build quality is amazing!

I personally think ATAG are the best all round boiler brand, with larger brands the installer gets lost amongst figures and targets. I seem to get a more personal touch with the ATAG staff! As for the boiler i have sold a few now. And all customers seem to be very happy. Build quality is amazing!


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Clearwater Plumbing & Heating
31st May 2017

Excellent build quality and easy to use interface. Competetively priced boiler with the option to extend warranty.

Excellent build quality and easy to use interface. Competetively priced boiler with the option to extend warranty.


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Drew Styles Plumbing & Heating
9th April 2017

Recently fit two of these on a big house and the customer is absolutely made up, fantastic boilers with great performance

Recently fit two of these on a big house and the customer is absolutely made up, fantastic boilers with great performance


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Atmosphere M&E Ltd
25th March 2017

Fitted the is 40 for a customer who had a faulty keston. They commented that their house had nexer been half as warm with their previos boiler! Really love the Atag's high quality and a reasonable price!

Fitted the is 40 for a customer who had a faulty keston. They commented that their house had nexer been half as warm with their previos boiler!
Really love the Atag's high quality and a reasonable price!


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Terry Burgin Plumbing and Heating Engineer
24th March 2017

Fitted a few ATAGs now and I'm very impressed with the build quality of them. The heat exchanger is a market leader along with the Viessmann heat exchanger. The ease of stripping this boiler down is what drew me to them, they feel like they have been designed by a fellow engineer, not some designer in an office!

Fitted a few ATAGs now and I'm very impressed with the build quality of them. The heat exchanger is a market leader along with the Viessmann heat exchanger. The ease of stripping this boiler down is what drew me to them, they feel like they have been designed by a fellow engineer, not some designer in an office!


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Gas-Tec Plumbing and Heating
9th February 2017

Fitted the 40kw version of this, great boiler. Not too heavy. Easy to engage on the jig. Quality brass and stainless matierials

Fitted the 40kw version of this, great boiler. Not too heavy. Easy to engage on the jig. Quality brass and stainless matierials


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by MB Gas & Heating Ltd
5th October 2016

Excellent build quality

Excellent build quality


Build Quality:

Easy of Use:

Features:

Value For Money:

Overall:

Review for ATAG iS System Boilers by Afterglow Plumbing & Heating Ltd.
30th September 2016