NGW 550
The gas water heater technology by KD Navien, which is even attracting North American consumers, is applied the same.
A combination of unparalleled cutting-edge technologies! The core of water heaters is the quality of their hot water!
The compact size can be installed in anywhere!
![](/images/en/product/motion/ngb_550_type02_boiler.png)
![](/images/en/product/ngb_550_visual01_mo.jpg)
This heat exchanger directly uses heated water!
Corrosion is no problem with this stainless heat exchanger.
If you are not going to use a heat exchanger for just one or two years,
choose KD Navien’s stainless heat exchanger with remarkable durability!
![](/images/en/product/ngb_550_visual03.jpg)
![](/images/en/product/ngb_550_visual03_mo.jpg)
applied to all Navien water heater models.
The mixing valve is a high-tech valve that makes hot water a certain temperature by
instantaneously measuring the temperature of water from the water heater and mixing in cold water when the
temperature is too high to maintain a constant water temperature.
![](/images/en/product/ngb_550_visual04.jpg)
![](/images/en/product/ngb_550_visual04_mo.jpg)
As more sophisticated TDR (flame size adjustment) automatically controls the flame by 100 – 14% depending on required heat,the product not only secures more precise hot water performance, but also saves gas charges by preventing any unnecessary gas consumption.
![](/images/en/product/ngb_550_visual05.jpg)
![](/images/en/product/ngb_550_visual05_mo.jpg)
KD Navien gas water heater ensures your safety.
-
APS(Air Pressure Sensor)
Since 1988, KD Navien has applied a wind pressure switch, a required safety device to prevent human and property damage, and adopted a further enhanced wind pressure sensor from 2004.
![](/images/en/product/ngb_550_visual06.jpg)
![](/images/en/product/ngb_550_visual06_mo.jpg)
The heater sounds much quieter than a regular quiet office. This gas water heater with the lowest noise in Korea is quieter than a conversation or a quiet office.
Considering the characteristics of installation in daily life,KD Navien designs a water heater with the lowest operating noise. a water heater with the lowest operating noise.
![](/images/en/product/ngb_550_visual07.jpg)
![](/images/en/product/ngb_550_visual07_mo.jpg)