Complete technical details and performance specifications for the GEM CS1 15/20
A J Wells and Sons
A O Smith
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The GEM CS1 15/20 delivers exceptional performance with a 90.8% efficiency rating, making it one of the most energy-efficient heating solutions available.
This Conventional boiler provides 15 - 20.5 (KW) of reliable heating power using Oil fuel for optimal performance.
Potential annual savings of £200-£400 compared to older, less efficient boilers, while reducing your carbon footprint.
Discover why the GEM CS1 15/20 is the perfect heating solution for your home
90.8% efficiency rating delivers maximum energy savings and optimal performance
Save £200-£400 annually on energy bills compared to older, less efficient boilers
Trusted GEM 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 GEM CS1 15/20 to help you make informed decisions
Calculate specific savings with the GEM CS1 15/20, including CO₂ reduction and payback period analysis.
Compare the GEM CS1 15/20 against other boiler models with detailed specifications and performance metrics.
Check if you qualify for a free GEM CS1 15/20 replacement through the government ECO4 scheme.
The GEM CS1 15/20 with its 90.8% efficiency rating is available at no cost through the government ECO4 scheme. Professional installation included with potential savings of £200-£400 annually.
✓ Government Approved ECO4 ✓ GEM Authorized ✓ 90.8% Efficiency Rated ✓ Professional Installation
