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Ultra Condensing Efficiency
Navien's Condensing Technology offers the high efficiency.
Money and energy savings over tank type water heaters and traditional water heaters.
Two Stainless Steel Heat Exchangers
Provides longer life expectancy as they are highly resistant to corrosion and erosion compared to copper heat exchangers.
Reduces minerals deposits
Low NOx Emissions (= 20ppm)
New metal fiber burner is designed to deliver a consistent air/gas mixture improving combustion efficiency.
Result in less acid rain and less green house effect.
Comply with SCAQMD 1146.2 strict NOx emissions standard.
2" PVC, CPVC, Polyprophylene Venting Up To 60'
2" venting option allows for a flue to be pulled through the existing vent.
3" vents can be used up to 150' with standard 2" x 3" adapters.
Utilizes Existing 1/2" Gas Line
The negative pressure gas valve and fan with dual venturi operation allows for better adaptability to low gas pressure applications.
Makes it possible for the NPE to be installed 1/2" gas lines up to 24'.
NCB models allow for easy convertibility from NG to LP.
Where Technology Meets Ecology, Combination Boiler
The ideal solution for customers who need both domestic hot water and a space heating application.
Heats water when needed, making it environmentally sound as well as cost efficient.
Hydronic Heating Benefits
Clean: little chance to cause dust or lower humidity because there is no air movement.
Silent: offers silent heating because no blowers are needed for forced circulation.
Comfort: keeps floors warm but indoor air fresh, making people feel warm and comfortable.
Coverage: radiant heat makes heating from floor to ceiling possible.
Economical: radiant heat in the floors can transmit warmth throughout the house hours after turning off the heater.
Automatic Water Filling System
Automatically fills water into space heating pipes when the unit senses a water shortage.
Powerful Anti-Freeze Feature
The Combi's built-in Control System is designed to keep the unit's plumbing frost free in winter conditions.
|Gas Input||Space Heating||18,000–100,000 BTU/H|
|Gas Input||Domestic Hot Water||18,000–180,000 BTU/H|
|Flow Rate (DHW)||77°F (43°C) Temp Rise||4.0 GPM (15.1 L/m)|
|Dimensions||17"(W) x 28"(H) x 12"(D)|
|Weight||84 lbs (38kg)|
|Installation Type||Indoor wall-hung|
|Venting Type||Forced draft direct vent|
|Water Pressure (Hydronic/DHW)||12–30 PSI /15–150 PSI|
|Natural Gas Supply Pressure (from source)||3.5" –10.5" WC|
|Propane Gas Supply Pressure (from source)||8.0" –13.5" WC|
|Natural Gas Manifold Pressure (min to max)||-0.05" WC / -0.36" WC|
|Propane Gas Manifold Pressure (min to max)||-0.10" WC / -0.66" WC|
|Minimum Flow Rate (DHW)||0.5 GPM (1.9 L/m)|
|Connection Sizes||Heating Supply/Return||1" NPT|
|Connection Sizes||DHW Inlet/Outlet||3/4" NPT|
|Connection Sizes||Gas Inlet||3/4" NPT|
|Connection Sizes||Auto Feeder||1/2" NPT|
|Connection Sizes||Condensate Outlet||1/2" NPT|
|Power Supply||Main Supply||120V AC, 60Hz|
|Power Supply||Maximum Power Consumption||200W (up to 2 amperes)|
|Materials||Casing||Cold rolled carbon steel|
|Materials||Heat Exchangers||Primary/secondary heat exchanger: stainless steel DHW heat exchanger: stainless steel|
|Venting||Exhaust||2" or 3" PVC, CPVC, approved polypropylene 2" or 3" special gas vent type BH (Class II, A/B/C)|
|Venting||Intake||2" or 3" PVC, CPVC, polypropylene 2" or 3" special gas vent type BH (Class II, A/B/C)|
|Venting||Vent Clearances||0" to combustibles|
|Safety Devices||Flame rod, APS, gas valve operation detector, ignition operation detector, water temperature high limit switch, exhaust temperature high limit sensor|