Since the first tankless water heater reached the market, such appliance has been growing in terms of popularity and technology. One of the most technologically advanced water heaters is the Navien NR-210A which uses a new water heating mechanism called condensing technology. Some important highlights of the product are briefly outlined as follows.
Features and Benefits
In almost all cases, condensing water heater is more efficient compared to its non-condensing counterparts. The non-condensing type uses hot gases to directly heat the water. Fuel is burned and the resulted energy heats the water, but not the entire energy is used.
On the other hand, the Navien NR-210A is able to create condensation inside the main unit, ensuring that it uses only the necessary energy to provide hot water; therefore, the condensing mechanism works more efficiently. In fact, this Navien has 98% of thermal efficiency, meaning almost no gas is wasted.
The Navien NR-210A is powered by natural gas and can be installed at either indoor or outdoor area. The unit’s overall dimension measures at 17-inch W × 28-inch H × 15-inch D; it weighs around 85 pounds. Once the appliance is turned on, it can deliver hot water at a minimum flow rate of 4.6 GPM (at 77-degree F rise) and a maximum flow rate of 10 GPM (at 35-degree F rise). [Read more...]
One of strongest points of EZ 101 tankless water heater is that it features battery-powered ignition mechanism. It does not need to be connected to electricity plug, so it is easier to install the unit anywhere outside the house. The ignition is powered by 2 D-cells battery. According to the manufacturer, the batteries can last for up to a year before replacement.
The overall dimension of this Bosch PowerStar measures at 14.8-inch x 7.3-inch x 3.4-inch, and it weighs only 5 pounds. As this electric water heater is designed for indoor installation, it should not be difficult to find an available space in home for perfect fit. Another good thing is that Bosch PowerStar AE-7.2 is a point-of-use style appliance, meaning it can be installed directly under kitchen sink or bathroom sink thus it avoids long pipe run. Without long pipe, it delivers hot water almost instantly anytime necessary. 
Since the T-K4-IN-LP is designed for mid-sized homes, its maximum flow rate of 8 GPM (gallons per minute) should be enough to provide hot water for almost all residential applications. With such feature, this tankless water heater remains ENERGY STAR qualified. The energy factor is 0.82, which is considered high for gas water heater. It means there will be less energy wasted or less gas used for the appliance to provide hot water.
Another major benefit of