The Navien NCB300 28kW LPG Gas Combi Boiler packs powerful heating and hot water performance into a compact, installer-friendly design. As Navien’s entry-level model in the premium NCB range, it has the same advanced technology, Stainless Steel heat exchanger and high efficiency ratings as bigger boilers — all in a smaller footprint for smaller homes.
With A+ ErP efficiency, smart controls compatibility, LPG conversion kit included and future-ready hydrogen blend capability, the NCB300 is designed for low running costs, flexible installation and long-term reliability.
Quiet, efficient and built to last, this one’s the perfect balance of high performance and everyday affordability.
The Navien NCB300 stands out for delivering premium performance at an affordable price. With its stainless steel heat exchanger, exceptional efficiency, high DHW flow rate, and smartphone-ready controls, it offers the perfect combination of durability, technology, and low running costs. Add in extended flueing options and easy installation, and it becomes one of the best-value modern combi boilers available today.
Upgrade to high-efficiency, compact reliability—order the Navien NCB300 28kW LPG Combi Boiler today for fast delivery and unbeatable performance!
| Product Type | Gas Combi Boiler |
|---|---|
| Model | NCB300 28kW |
| Manufacturer Warranty | 5 Years (T&Cs Apply) |
| Dimensions (H x W x D) | 680 x 395 x 285 mm |
| Weight | 33kg (Lift Weight 29kg) |
| CH Output | 26kW (88,715 BTU) |
| Modulation Ratio | 7:1 |
| DHW Max Output | 37kW |
| DHW Flow Rate @ 35°C Rise | 11.5 L/min |
| DHW Flow Rate @ 25°C Rise | 16.0 L/min |
| Shower Capability | 1 Shower |
| Fuel Type | NG / LPG (Conversion Kit Included) |
| Flue Size | Ø60/100 Coaxial |
| Max Flue Length (Horizontal/Vertical) | 8m / 8m |
| ErP Heating Efficiency | A (93%) |
| ErP with Smart Plus Controls | A+ (98%) |
| NOx Class | Class 6 |
| Water Resistance Rating | IPX4 |
| Hydrogen Ready | 20% Blend |
