Comprehensive side-by-side analysis of efficiency ratings, specifications, and performance metrics
Head to Head
Sime Heating Products (UK)
Merlin 100/150 BF
Merlin • 81.3%
Both Boilers
Available FREE through ECO4 scheme
Merlin 100/150 BF offers superior efficiency at 81.3%, making it the better choice for long-term savings.
Both Merlin 100/150 BF and Sime Heating Products (UK) Format super 100 are available at no cost through the government ECO4 scheme. Take the next step today.
✓ Government Approved Scheme ✓ No Hidden Costs ✓ Professional Installation ✓ Energy Efficient
