Comprehensive side-by-side analysis of efficiency ratings, specifications, and performance metrics
Boulter
Head to Head
Express BC 28 Combi
Express • 86.5%
Both Boilers
Available FREE through ECO4 scheme
Express BC 28 Combi leads with 86.5% efficiency, providing better performance and energy savings.
Both Boulter Bonus 40/65 and Express BC 28 Combi 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
