Comprehensive side-by-side analysis of efficiency ratings, specifications, and performance metrics
Servowarm
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 Servowarm Elite 21 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
