The ATAG i15S system boiler packs impressive performance into its compact frame, delivering 14.7 kW output with 93% efficiency. You'll appreciate its premium stainless steel construction and innovative iCon heat exchanger, which helps maintain 98% of its original efficiency over time. Priced between £1,270-£1,279 (plus £500-£1,000 for installation), it comes with a robust 10-14 year warranty. The boiler's compatibility with LPG and solar systems makes it a versatile choice for your home heating needs – but there's much more to discover about this efficient unit.
Key Takeaways
- ATAG I15s delivers 14.7 kW output with 93% efficiency rating, maintaining 98% efficiency throughout its lifetime.
- The boiler costs £1,270-£1,279, with total installation costs ranging from £2,100 including professional fitting.
- Premium stainless steel construction and iCon heat exchanger provide exceptional durability with 10-14 year warranty coverage.
- Compact dimensions of 700 x 440 x 355 mm make it suitable for various installation locations.
- Compatible with unvented cylinders, solar systems, and convertible to LPG for off-grid installations.
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ATAG i15S System Boiler Overview
The ATAG i15S system boiler packs impressive performance into a compact frame that'll fit neatly inside a kitchen cupboard.
With its 14.7 kW output and high-efficiency ErP rating of A, you'll get reliable heating while keeping your energy bills in check.
This wall-mounted system boiler is perfect if you've got high hot water demands at home. You'll appreciate its compatibility with unvented cylinders and solar systems, making it a future-proof choice for your property.
- Measures just 700 x 440 x 355 mm – perfect for tight spaces
- Built with premium stainless steel components for durability
- Comes with an impressive 10-14 year warranty depending on your supplier
- Features an in-built ErP pump to maximise energy efficiency
The i15S's IPX4D rating means it's well-protected against water splashes, while its low maintenance requirements will save you hassle down the line.
ATAG i15S System Boiler Performance and Efficiency
While many boilers make big promises about efficiency, ATAG's i15S system boiler actually delivers with its impressive 93% efficiency rating and ErP A-rating for central heating. You'll be pleased to know it maintains 98% of its original efficiency throughout its lifetime, helping keep those energy bills in check.
The i15S boasts some impressive performance stats that'll make your wallet happy:
| Feature | Benefit |
|---|---|
| iCon Heat Exchanger | Superior heat transfer |
| Stainless Steel Components | Long-lasting durability |
| Low NOx Emissions | Environmentally friendly |
With a maximum output of 14.7 kW, it's perfect for smaller homes with up to 10 radiators and a single bathroom. Plus, it's LPG compatible with a conversion kit, giving you flexible fuel options if you're off the gas grid. Our website's ATAG boiler category contains detailed guides on installation and maintenance requirements for optimal performance.
ATAG i15S System Boiler Pros and Cons
As you weigh your options for a new heating system, understanding the i15S's strengths and limitations will help you make a confident decision.
This compact powerhouse offers impressive efficiency ratings and durability, making it a smart choice for smaller homes with one bathroom.
- Exceptional 93-94% efficiency rating that'll keep your energy bills in check
- Generous warranty options up to 14 years, plus a lifetime guarantee on the heat exchanger
- Compact size that'll fit nicely in a kitchen cupboard (especially the 275mm model)
- Solar compatibility for future-proofing your home's energy setup
While the i15S shines in many areas, it's worth noting that it's specifically designed for smaller properties.
If you've got multiple bathrooms or a larger home, you'll want to reflect on a higher output model for adequate hot water supply.
How Does The ATAG i15S System Boiler Compare To Similar Models From Other Manufacturers?
Now that we've explored the i15S's key features, let's see how it stacks up against its competitors in the 15kW system boiler category.
When compared to similar models like the Worcester Bosch Greenstar 8000 Life and Vaillant ecoTEC Plus 615, the ATAG i15S holds its own with a competitive 93% efficiency rating.
But where it really shines is its industry-leading 14-year warranty – that's 4 years longer than Worcester Bosch and 9 years more than Vaillant.
The i15S's high-grade stainless steel components and innovative iCon heat exchanger help maintain 98% of its original efficiency throughout its lifetime.
While you'll pay a bit more upfront compared to some rivals, you're getting premium build quality that's earned ATAG the #1 spot on Trustpilot with an impressive 4.9/5 rating.
Our comprehensive guides on Vaillant boilers provide detailed comparisons of alternative heating solutions for your home.
How Much Does A ATAG i15S System Boiler Cost?
The price tag on an ATAG i15S system boiler ranges from £1,270 to £1,279 for the unit alone, but you'll need to factor in installation costs too.
With standard installation, you're looking at around £3,100, though the average fully fitted cost sits at about £2,100.
Several factors can impact your final bill, including your location and how complex the installation might be.
Think of it like buying a car – the basic model's one thing, but those extras add up!
- Standard installation costs between £500-£1,000
- Additional components like filters and flues add roughly £300
- System conversions or relocations will bump up the price
- Smart thermostats are optional but increase the overall cost
The good news? The boiler's 93% efficiency rating means you'll save on energy bills long-term.
ATAG i15S System Boiler Warranty and Service Support
When it comes to protecting your investment, ATAG doesn't mess around with their i15S system boiler warranty. You'll get a standard 12-year warranty that you can extend up to an impressive 18 years with their Complete Care Pack.
The warranty's "no ifs, no buts" policy covers all aspects of your boiler for free repairs, including a lifetime guarantee on the heat exchanger. Just remember to schedule your annual service with a Gas Safe registered engineer to keep everything valid.
Need support? ATAG's got your back with their weekday warranty helpline at 0800 680 0100. You can also access troubleshooting tips and product manuals on their website, plus there's a handy ATAG ONE controller app for both Apple and Android devices if you're tech-savvy.
Final Verdict
After carefully weighing all factors, ATAG's i15S system boiler proves itself as a solid choice for smaller homes with modest heating demands.
With its impressive 93% efficiency rating and ErP A-rating, you'll enjoy lower energy bills while keeping your home cosy.
The stainless-steel heat exchanger's lifetime guarantee gives you peace of mind, while smart controller compatibility lets you manage your heating from your phone.
Just remember you'll need space for that hot water cylinder.
- Perfect for properties with up to 10 radiators and one bathroom
- High-efficiency performance that'll keep your energy bills in check
- Built to last with premium components and extensive warranty
- Smart-home ready with compatibility for leading control systems
You'll need to weigh the higher upfront cost against long-term savings, but the quality and reliability make it a worthwhile investment for the right home.
Get Up To 3 Free Quotes For Your New Boiler
Now that you've decided the ATAG i15S could be right for your home, let's help you secure the best possible price for your installation.
Understanding new boiler installation costs can help you better evaluate competitive quotes from different providers.
The smartest way to get a great deal is by comparing quotes from multiple installers.
Through our free quote comparison service, you'll receive up to three competitive quotes from local Gas Safe registered engineers.
They're all fully insured and experienced with ATAG installations, so you can rest easy.
Don't forget to ask each installer about their warranty offerings and service packages.
We recommend comparing at least three different quotes to guarantee you're getting the best value – after all, a new boiler is a significant investment, and a little research goes a long way!