The ATAG i40S system boiler combines power and efficiency in a compact package. You'll get impressive 94% efficiency, 40kW output for up to 20 radiators, and a durable stainless steel heat exchanger with a lifetime guarantee. While it's pricier at £1,510-£1,520 (£3,900 installed), you're backed by a 10-14 year warranty and smart control compatibility. The separate hot water cylinder requirement is worth considering, but the boiler's stellar performance and long-term reliability might just win you over.
Key Takeaways
- ATAG i40S system boiler costs £1,510-£1,520, with total installation costs around £3,900 including chemical flush and magnetic filter.
- Delivers powerful 40kW output for heating and hot water, capable of powering up to 20 radiators with 94% energy efficiency.
- Features a 10-year warranty (extendable to 14 years) and includes an iCon heat exchanger with lifetime replacement guarantee.
- Compact dimensions of 700mm x 440mm x 355mm make it suitable for standard kitchen cupboards, but requires separate hot water cylinder.
- Free installation quotes available from Gas Safe registered installers, with flexible payment options including 10.9% finance available.
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ATAG i40S System Boiler Overview
The ATAG i40S system boiler packs impressive power and efficiency into a surprisingly compact frame.
At just 700mm x 440mm x 355mm, you'll find it fits neatly into a standard kitchen cupboard while delivering a robust 40kW output for both heating and hot water.
You're looking at a highly efficient unit here, with a 94% energy efficiency rating and A-ratings for both heating and hot water.
The built-in ErP pump helps keep your energy bills in check, while the user-friendly controls make operation a breeze.
The iCon heat exchanger comes with a lifetime replacement guarantee – that's the kind of confidence you want from a manufacturer.
Plus, if you're not on mains gas, there's an LPG conversion kit available.
Just remember you'll need a separate hot water cylinder for this system boiler.
ATAG i40S System Boiler Performance and Efficiency
When it comes to raw performance, ATAG's i40S system boiler delivers impressive numbers that'll make energy-conscious homeowners smile. With a 94% efficiency rating and ErP A-rating for heating, you'll see significant savings on your energy bills – up to £320 annually.
| Feature | Benefit |
|---|---|
| 38.8 kW Output | Powers up to 20 radiators |
| iCon Heat Exchanger | Lifetime replacement guarantee |
| 98% Efficiency Retention | Maintains performance long-term |
| Smart Control Compatible | Works with ONEZone controller |
| Bottom-up Modulation | Guarantees quiet operation |
You'll appreciate the boiler's robust 38.8 kW output, which easily handles homes with multiple bathrooms. The unique iCon heat exchanger, crafted from high-grade stainless steel, keeps the system running at peak efficiency throughout its lifetime – talk about staying power!
ATAG i40S System Boiler Pros and Cons
Before investing in an ATAG i40S system boiler, you'll want to evaluate its strengths and limitations carefully.
On the plus side, you're getting a highly efficient unit with 94% efficiency and a generous 10-year warranty that's extendable to 14 years. The compact size means it won't eat up your valuable cupboard space.
The stainless steel construction and lifetime guarantee on the iCon heat exchanger will give you peace of mind. You'll also appreciate its environmental friendliness with low NOx emissions and smart thermostat compatibility.
However, there are some drawbacks to evaluate. You'll need space for a separate hot water cylinder, and the initial cost is higher than some competitors.
Finding an installer might be trickier too, as ATAG requires certified partners for warranty coverage.
How Does The ATAG i40S System Boiler Compare To Similar Models From Other Manufacturers?
Making sense of how the ATAG i40S stacks up against its competitors will help you decide if it's worth the investment.
With its 38.8 kW output, it outperforms similar models from Vaillant and Worcester Bosch while matching their impressive 94% efficiency rating.
You'll get more peace of mind with ATAG's standard 10-year warranty, which beats both Intergas's 7-year and Vaillant's 5-year offerings.
The Worcester Bosch Greenstar 8000 Style matches this warranty period, but offers slightly lower output at 35 kW.
What really sets the ATAG i40S apart is its iCon heat exchanger, which keeps running at 98% of its original efficiency throughout its lifetime – something you won't find in competing models.
While it's priced higher than some alternatives, the combination of performance, warranty, and build quality makes it a compelling choice.
For those considering other options, Vaillant boilers provide reliable alternatives with proven track records in the UK market.
How Much Does A ATAG i40S System Boiler Cost?
Looking to budget for an ATAG i40S system boiler? You're looking at £1,510-£1,520 for the unit alone, while a complete installation package will typically run around £3,900. This includes your boiler, labour, and essential sundries like filters and flues.
Here's what's included in a standard installation:
- The ATAG i40S boiler (38.8kW output)
- Chemical system flush
- Magnetic filter for system protection
- New wireless thermostat and flue
You've got flexible payment options too. You can pay upfront or opt for 10.9% finance with an instant credit decision.
For peace of mind, you can extend the standard 10-year warranty to 14 years with the Complete Care Pack. The total cost might vary based on your location and specific installation requirements.
ATAG i40S System Boiler Warranty and Service Support
The ATAG i40S system boiler comes with an impressive warranty package that'll help protect your investment for years to come.
You'll get a standard 10-year warranty that covers both parts and labour, with options to extend up to 14 years. The iCon heat exchanger even comes with a lifetime guarantee.
To keep your warranty valid, you'll need to schedule annual services with a Gas Safe registered engineer. It's a bit like taking your car for its yearly MOT – it keeps everything running smoothly and safely.
If you ever need support, you've got multiple options. There's a dedicated hotline (0800 680 0100) and a technical service desk (01268 546772).
Plus, you can control your boiler through the ATAG ONE Zone smart controller and smartphone app.
Final Verdict
After thoroughly testing and analysing the ATAG i40S system boiler, we're confident it's a solid choice for larger homes needing reliable heating and hot water.
With its impressive 94% efficiency rating and robust build quality, you'll get exceptional performance that won't let you down.
The price point might be higher than some competitors, but you're getting what you pay for – premium components and potential long-term savings on your energy bills.
Plus, that 10-year warranty (extendable to 14 years) shows ATAG stands behind their product.
- Powerful 38.8 kW output heats large homes effortlessly
- Premium brass and stainless steel construction guarantees durability
- User-friendly controls make daily operation a breeze
- Compact design saves valuable wall space
If you're looking for a high-end system boiler that'll serve you well for years to come, the i40S deserves your consideration.
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