Navien offers two main lines of tankless water heaters: the condensing 98% NR/NP and the CR/CC. They also produce combination gas water heaters and heating boxes for more efficient control. The installation and venting of the Navien heaters is incredibly simple, posing no problems for the experienced plumber or building contractor. Benefits include:

• Low operating cost – a condensing tankless system saves an average of $160 annually compared to standard hot water tanks.
• Long lifecyle – since Navien uses stainless steel heat exchangers instead of the copper used by other brands of tankless heater, they are more resistant to corrosion. Navien heaters last from 3.8 to 4.5 times longer than the copper based heaters. Stainless steel also allows for operating at lower temperatures, also reducing wear and tear.
• Endless supply of hot water – there is no limit to the hot water available from the Navien tankless water heaters.
• PVC venting – 3-inch PVC venting can extend 100 feet with up to 6 elbows.
• Eco-friendly – less gas use equals reduced CO2 emissions.
• Optional circulation pump – with a circulation pump there is no minimum flow rate requirements and hot/cold stacking is minimized.
• Saves space – Navien tankless hot water heaters take up 90% less space than 50 gallon water tanks.
• Dual microprocessors – two microprocessors control operation more efficiently by cross monitoring each other’s performance.
• Remote operation – wall-mounted remote control adjusts temperatures from 98 – 120 degrees F.

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The Navien Condensing CR/CC Tankless Water Heater provides an endless supply of hot water at a steady temperature while boasting the industry's highest efficiency rating of 98%.

As a result of Navien's ultra condensing efficiency saves customers' money even when compared to other tankless units. Based on the Department of Energy's 2007 operating costs, Navien's Condensing CR/CC Tankless Water Heater saved $40 over another tankless model and $160 over conventional tank models.

The Navien Condensing CR/CC Tankless Water Heater also provided the highest gallons-per-minute (GPM) when input BTUs were compared to other units.

The “A” models of Navien's units have a built-in circulation pump with a mini buffer. This system delivers hot water quickly and as a result conserves water. There is no minimum flow rate.

Navien Condensing CR/CC Tankless Water Heaters use condensing technology which uses less gas and has the industry's lowest CO2 emissions. The alkaline contained in household sewage is reduced and results in less water pollution.

FACT: Each Navien Tankless Water Heater which is installed makes such an impact in CO2 reductions it is the equivalent to diving a car 420 fewer miles each year.

Navien's dual stainless-steel heat exchanger provide superior corrosion resistance and increases the life expectancy of the unit as much as 4 ½ times longer.

The unit also improves on efficiency by operating with low to mid temperature water and numerous safety measures have been put in place to prevent damage to the unit as well as other personal property.

Navien America's tankless water heaters are labeled with Energy Star and are qualified for the (U.S.) federal income tax credit of 30% of the cost of the unit (up to $1,500).

The Navien Condensing CC Tankless Water Heaters are for commercial and heavy-duty residential use.

The warranty for the CR units is 15 years on the heat exchanger and five years on all other parts and components. Commercial and heavy residential units are guaranteed for 10 years on the heat exchanger and five years on all other parts and components.

Navien Condensing CR/CC Models Tankless Water Heater Deals on Ebay:

For the prospective tankless water heater owner efficiency is a key metric by which heaters are measured. While other heaters are usually around 80 to 85% percent efficient, Navien Condensing NR/NP tankless water heaters average an astounding 98% percent efficiency. These models are able to achieve this high efficiency by a condensate recovery system.

Models from other manufacturers utilize either natural gas or propane as fuel, and give off water vapor in the exhaust, which is then passed out the exhaust duct to the outside. The Navien NR/NP models pass the exhaust gas through a second heat exchanger and condense the water vapor back into hot water which is then recycled. Other manufacturers do not have a second heat exchanger and dump any condensate generated by the exhaust cooling process as waste.

The Navien NR/NP models are either natural gas or LP powered and offer maximum heat inputs from 150,000 to 200,000 BTU. Temperature rise specifications vary depending on model, but using 45˚F as a baseline, the three flow rates specified are 6.5, 7.7, and 8.6 gpm. In addition, up to 98 individual heaters can be linked together to supply heavier demand applications.

All models come with 3/4" NPT fittings for both gas and water attachments. All heat exchangers are made of stainless steel, not copper like other manufacturers. The water input pressure can vary between 15 and 150 psi, and ignition is via standard 120V household supply. Minimum flow rate required for activation is 0.5 gpm except on models equipped with a buffer tank. For these "A" models, there is no minimum activation flow rate.

The Navien Condensing NR/NP tankless water heaters also come with one of the best warranties in the industry. The heat exchangers are warranted for 15 years and all other parts are warranted for 5 years.

Navien Condensing NR/NP Models Tankless Water Heater Deals on Ebay: