Korean brand Navien strives to constantly improve the efficiency of its range of condensing and non-condensing gas or liquid propane-fired tankless units. The non-condensing variant is the standard continuous-flow tankless water heater. In contrast, non-condensing models recycle the heat from exhaust gases post-combustion, resulting in greater efficiency and utility bill savings.
The Navien residential product line consists of four non-condensing models. Two are in the NHW-A series and feature the brand’s ComfortFlow system, which uses a built-in recirculation pump, eliminating the requirement for an external unit. The other two belong to the NPN series, incorporating several unique features within their segment.
The two condensing models belong to the NPE-2 series. These promise to provide continuous hot water, better longevity, and less maintenance throughout their lifespan, which can be as much as 15 years, according to the Navien warranty. These units are initially more expensive than their non-condensing models, but they are far more efficient, saving money in the long run.
The Navien range is comparatively small, consisting of just six models, but while choice is limited, quality is high. Average costs are higher than average at between $1,400 and $2,300, not including installation. However, they offer innovative and money-saving features, and the warranties are reassuringly long.
