Complete technical details and performance specifications for the Worcester Firefly HD II 100
A J Wells and Sons
A O Smith
ACV
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i
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icon Heating
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Warmflow
Warmworld
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Worcester
Yorkpark
The Worcester Firefly HD II 100 delivers exceptional performance with a 65.0% efficiency rating, making it one of the most energy-efficient heating solutions available.
This Non-Condensing boiler provides Unknown (KW) of reliable heating power using Oil fuel for optimal performance.
Potential annual savings of £50-£200 compared to older, less efficient boilers, while reducing your carbon footprint.
Discover why the Worcester Firefly HD II 100 is the perfect heating solution for your home
65.0% efficiency rating delivers maximum energy savings and optimal performance
Save £50-£200 annually on energy bills compared to older, less efficient boilers
Trusted Worcester 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 Worcester Firefly HD II 100 to help you make informed decisions
Calculate specific savings with the Worcester Firefly HD II 100, including CO₂ reduction and payback period analysis.
Compare the Worcester Firefly HD II 100 against other boiler models with detailed specifications and performance metrics.
Check if you qualify for a free Worcester Firefly HD II 100 replacement through the government ECO4 scheme.
The Worcester Firefly HD II 100 with its 65.0% efficiency rating is available at no cost through the government ECO4 scheme. Professional installation included with potential savings of £50-£200 annually.
✓ Government Approved ECO4 ✓ Worcester Authorized ✓ 65.0% Efficiency Rated ✓ Professional Installation
