Comprehensive side-by-side analysis of efficiency ratings, specifications, and performance metrics
Boulter
Head to Head
Hoval TopGas (45)
Hoval • 88.0%
Both Boilers
Available FREE through ECO4 scheme
Hoval TopGas (45) leads with 88.0% efficiency, providing better performance and energy savings.
Both Boulter Bonus 40/65 and Hoval TopGas (45) 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
