Complete technical details and performance specifications for the Mistral S4-1215 Sealed System
A J Wells and Sons
A O Smith
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The Mistral S4-1215 Sealed System delivers exceptional performance with a 83.8% efficiency rating, making it one of the most energy-efficient heating solutions available.
This Conventional boiler provides 35.2 - 44 (KW) of reliable heating power using Oil fuel for optimal performance.
Potential annual savings of £100-£250 compared to older, less efficient boilers, while reducing your carbon footprint.
Discover why the Mistral S4-1215 Sealed System is the perfect heating solution for your home
83.8% efficiency rating delivers maximum energy savings and optimal performance
Save £100-£250 annually on energy bills compared to older, less efficient boilers
Trusted Mistral 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 Mistral S4-1215 Sealed System to help you make informed decisions
Calculate specific savings with the Mistral S4-1215 Sealed System, including CO₂ reduction and payback period analysis.
Compare the Mistral S4-1215 Sealed System against other boiler models with detailed specifications and performance metrics.
Check if you qualify for a free Mistral S4-1215 Sealed System replacement through the government ECO4 scheme.
The Mistral S4-1215 Sealed System with its 83.8% 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 ✓ Mistral Authorized ✓ 83.8% Efficiency Rated ✓ Professional Installation
