Comprehensive side-by-side analysis of efficiency ratings, specifications, and performance metrics
Boulter
Head to Head
Wolf CGB-11
Wolf • 88.9%
Both Boilers
Available FREE through ECO4 scheme
Wolf CGB-11 leads with 88.9% efficiency, providing better performance and energy savings.
Both Boulter Bonus 65/90A and Wolf CGB-11 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
