Comprehensive side-by-side analysis of efficiency ratings, specifications, and performance metrics
Boulter
Head to Head
Rinnai UK E32S
Rinnai UK • 89.5%
Both Boilers
Available FREE through ECO4 scheme
Rinnai UK E32S leads with 89.5% efficiency, providing better performance and energy savings.
Both Boulter Bonus 40/65 and Rinnai UK E32S 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
