Comprehensive side-by-side analysis of efficiency ratings, specifications, and performance metrics
Head to Head
Protherm
Keston C 36 Combi
Keston • 89.8%
Both Boilers
Available FREE through ECO4 scheme
Keston C 36 Combi offers superior efficiency at 89.8%, making it the better choice for long-term savings.
Both Keston C 36 Combi and Protherm 100EC 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
