Comprehensive side-by-side analysis of efficiency ratings, specifications, and performance metrics
Head to Head
Sime Heating Products (UK)
ATAG A203C
ATAG • 89.3%
Both Boilers
Available FREE through ECO4 scheme
ATAG A203C offers superior efficiency at 89.3%, making it the better choice for long-term savings.
Both ATAG A203C 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
