Comprehensive side-by-side analysis of efficiency ratings, specifications, and performance metrics
Head to Head
Optia
Navien NCB-23LHWE
Navien • 89.2%
Both Boilers
Available FREE through ECO4 scheme
Navien NCB-23LHWE offers superior efficiency at 89.2%, making it the better choice for long-term savings.
Both Navien NCB-23LHWE and Optia FF40 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
