|Fuel Source||Natural Gas|
|Vent Type||Direct Vent|
|Maximum Input Capacity (BTU)||199,900|
|Minimum Input Capacity (BTU)||20,000|
|Minimum Flow Rate (GPM)||0.5|
|Primary Vent Pipe Diameter (Inches)||3|
|Gas Connection Size (Inches)||3/4|
|Cold Water Inlet (Inches)||3/4|
|Hot Water Outlet (Inches)||3/4|
|Supply Connection (Inches)||1|
|Return Connection (Inches)||1|
|Product Height (Inches)||28|
|Product Width (Inches)||17|
|Product Depth (Inches)||12|
|Product Weight (Pounds)||84|
|Parts Warranty (Years)||5|
|Heat Exchanger Warranty (Years)||10|
|Energy Star Listed||Yes|
Navien has been pushing the boundaries of efficiency for 25 years. The CH-240-ASME-NG is a result of their dedication to providing an effective and green combi boiler. With a CH-240-ASME-NG, all of your space heating and domestic hot water needs are satisfied by a single product, saving you space and streamlining your heating operations. The CH-240-ASME-NG and all Navien models utilize condensing technology which captures additional heat lost by typical combi boilers. The Navien CH-240-ASME-NG's energy factor is superior to both traditional boilers and noncondensing combi boilers. Reduced vent temperatures due to this condensing technology allow you to use PVC venting, which saves you money and contributes to the ease of installation. The Navien CH-240-ASME-NG has excellent technology for reducing your heating costs and carbon footprint.
Adapts to Your Home
The Navien CH-240-ASME-NG has an ASA Control System with a built-in thermostat that preserves the ideal temperature throughout your home. The ASA Control System keeps you comfortable by checking the temperature of your home against the temperature of return-water and making adjustments on the fly.
Help the Environment
The Navien CH-240-ASME-NG will reduce your home's impact on the environment. Eco Pre-mixed Burners reduce CO and NOx emissions by combining gas heating and air before ignition. The result is a nearly 75% reduction in polluting emissions. In fact, an installed Navien CH-240-ASME-NG reduces CO2 by the same amount as 31 cypress trees.
Navien products reduce energy consumption without sacrificing comfort. Their tankless models, such as this one, only heat water when you need it, reducing energy expenditure. Also, the CH-240-ASME-NG uses a secondary heat exchanger to transform condensation and exhaust into additional heat. This reduces the ventilation temperature and increases the energy factor. The CH-240-ASME-NG's efficiency translates directly into savings on operation costs for you!
The Navien CH-240-ASME-NG uses stainless steel for the Eco Pre-mixed Burner and both heat exchangers. This prevents corrosion and increases the lifespan of your CH-240-ASME-NG. Navien is so confident in the quality of their product that they offer a 10 year warranty on the CH-240-ASME-NG's heat exchanger.
A Product You Can Trust
Navien Products are recognized by an array of organizations. The CH-240-ASME-NG is certified by Energy Star, the Canadian Standards Association, and the American Society of Mechanical Engineers.
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Navien - BCRA1129 - Ready-Link Communication Cable - For NR and NPE Series Tankless Water Heaters and CH Series Combi Boilers
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