Navien NCB 40kW Combi Boiler

The Navien NCB 40kW is a highly reliable, wall-mountable combi gas boiler that has been designed to be compact and lightweight, meaning that it can be installed neatly inside your kitchen cupboard, out of sight, out of mind.

Thanks to its efficiency rating of 93% and an ErP A-rating for both heating and hot water, this combi boiler could potentially help you to reduce your energy bills.

The Navien NCB 40kW is the most powerful of the four boiler models in the combi boiler range. With an output of 33.2kW for central heating and 39.6kW for hot water, this combi boiler is one of the most powerful, with the ability to heat a medium-sized home with up to 20 radiators and multiple bathrooms.

The Navien NCB range is also available as a 24kW, 28kW, and a 34kW combi boiler for smaller homes with a lesser demand for central heating and hot water.