Navien CH Condensing Boilers Review

Navien on demand heaters from CH series: CH-180, CH-210 and CH-240 are extra-efficient combination boilers that are designed for potable water and space heating, including hydronic radiator, radiant floor, baseboard and air handler heating, utilizing the tankless and condensing technology.

Navien CH-ASME group is comprised of the three models, different in power and flow rate, and are used in a variety of applications.

navien ch tankless

The Eco-friendly gas burner uses the pre-mixed air – gas mixture so it can produce less CO2 and NOx gases than conventional type, and thanks to the GARC system Navien ensures the right air/gas ratio for the optimal gas combustion.

The gas burner is modulating so it can work in the range from the minimum 17,000 Btu to the maximum of 199,000 Btu/hr while the maximum flow rate is 8.4 GPM (at 45 F rise), which is sufficient for medium size homes and families.

When the Navien CH is used in home space heating, its ASA control system automatically adjusts the temperature if the temperature of the air inside the room changes.

Features review

  • Ultra high energy efficiency of 91% for the natural gas and 92% for propane.
  • Optimal combustion with the GARC system.

  • Auto sensing and adaptive heating system.
  • Usage in potable water and hydronic space heating.

  • Primary and secondary stainless steel heat exchangers for the low energy loss. Due to the high corrosion resistance, they last longer than conventional type.

  • Low NOx emission thanks to the Eco friendly burner.

  • Automatic water filling system if there is a water shortage in the water heating system.

  • Indoor and outdoor installation (based on the model).

  • Safe and reliable electronic ignition.

  • Standard 3/4" connections.

  • Flexible direct venting that includes PVC, flexible aluminum and SS and ABS pipes for the air intake and PP and CPVC for the exhaust. Pipes lengths up to 100 feet for the fast and simple installation.

  • Remote control for the convenient and intelligent control and monitoring.

  • Outdoor sensor for the automatic regulation with the changes in the outside temperature.

  • The built-in carbon monoxide monitoring system and water leak detector for additional safety.

  • Warranty of 10 years on heat exchangers and 5 on parts.

  • The price is from $1200 to $2000.

Specification

Models
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Specifications
CH-180ASME CH-210ASME CH-240ASME
Power
(Btu/hr)
17,000-150,000 20,000-175,000 20,000-199,000
Water Flow
(GPM) @ 35 F rise
6.2 7.3 8.4
Energy Factor
91%-92%
91% 91%
Min. Water Flow
(GPM)
0.5 0.5 0.5
Temp. settings
(F)
98-140 98-140 98-140
Electric consumption
(Watts)
200 200 200
Max. vent length
(ft)
100 100 100
Weight
(pounds)
74 84 84

According to the features from above, Navien CH series of condensing water heaters truly offers a cutting-edge technology, which results in the most efficient water and space heating, with the great savings and reduction in green houses gases. With the high gas input of around 199,900 BTU the above tankless units are ideal for installation anywhere in the house, outside and in applications such as the baseboard, in-floor radiant and air handler heating. These units can supply enough hot water for almost any house size while for the high demanding, the cascading system can be applied.

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