Complete technical details and performance specifications for the Ariston Clas 21 FF System
A J Wells and Sons
A O Smith
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The Ariston Clas 21 FF System delivers exceptional performance with a 80.4% efficiency rating, making it one of the most energy-efficient heating solutions available.
This Conventional boiler provides 24.2 - 24.2 (KW) of reliable heating power using Gas fuel for optimal performance.
Potential annual savings of £100-£250 compared to older, less efficient boilers, while reducing your carbon footprint.
Discover why the Ariston Clas 21 FF System is the perfect heating solution for your home
80.4% efficiency rating delivers maximum energy savings and optimal performance
Save £100-£250 annually on energy bills compared to older, less efficient boilers
Trusted Ariston 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 Ariston Clas 21 FF System to help you make informed decisions
Calculate specific savings with the Ariston Clas 21 FF System, including CO₂ reduction and payback period analysis.
Compare the Ariston Clas 21 FF System against other boiler models with detailed specifications and performance metrics.
Check if you qualify for a free Ariston Clas 21 FF System replacement through the government ECO4 scheme.
The Ariston Clas 21 FF System with its 80.4% efficiency rating is available at no cost through the government ECO4 scheme. Professional installation included with potential savings of £100-£250 annually.
✓ Government Approved ECO4 ✓ Ariston Authorized ✓ 80.4% Efficiency Rated ✓ Professional Installation
