Complete technical details and performance specifications for the ATAG iS40
A J Wells and Sons
A O Smith
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The ATAG iS40 delivers exceptional performance with a 89.8% efficiency rating, making it one of the most energy-efficient heating solutions available.
This Conventional boiler provides 35.4 - 35.4 (KW) of reliable heating power using Gas fuel for optimal performance.
Potential annual savings of £150-£300 compared to older, less efficient boilers, while reducing your carbon footprint.
Discover why the ATAG iS40 is the perfect heating solution for your home
89.8% efficiency rating delivers maximum energy savings and optimal performance
Save £150-£300 annually on energy bills compared to older, less efficient boilers
Trusted ATAG engineering with comprehensive warranty coverage
Built to last with modern condensing technology and premium components
Discover other high-efficiency boilers that might be perfect for your home
Advanced tools designed specifically for the ATAG iS40 to help you make informed decisions
Calculate specific savings with the ATAG iS40, including CO₂ reduction and payback period analysis.
Compare the ATAG iS40 against other boiler models with detailed specifications and performance metrics.
Check if you qualify for a free ATAG iS40 replacement through the government ECO4 scheme.
The ATAG iS40 with its 89.8% efficiency rating is available at no cost through the government ECO4 scheme. Professional installation included with potential savings of £150-£300 annually.
✓ Government Approved ECO4 ✓ ATAG Authorized ✓ 89.8% Efficiency Rated ✓ Professional Installation
