Comprehensive side-by-side analysis of efficiency ratings, specifications, and performance metrics
Boulter
Head to Head
Unical Alkon 28 SR HE
Unical • 88.6%
Both Boilers
Available FREE through ECO4 scheme
Unical Alkon 28 SR HE leads with 88.6% efficiency, providing better performance and energy savings.
Both Boulter Bonus 40/65 and Unical Alkon 28 SR HE 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
