6th Sense - Ultra low NOx Features

• This series of tall water heaters come with the patented Flame Lock Safety System that helps minimize the chances of accidental fires.


• The advanced self-diagnostics feature helps in monitoring the system's status.


• The electronic igniter ensures that the pilot gets lighted in an easier manner.


• The water heater also includes the combination of gas valve and thermostat along with vacation setting.


• This series of Whirlpool 6th Sense technology – Ultra Low NOx water heater is equipped with the self-cleaning feature that doesn't allow lime and sediment buildup.


• The water heater is certified to function even at an altitude of up to 10,100 feet.


• The Whirlpool gas water heated is fitted with temperature and pressure relief valves that offer protection against excessive pressures and temperatures.


• The water heater utilizes a non-direct single pipe vent, which helps in removing exhaust gases caused through the burning of fossil fuels.

Evaluation of the Ultra Low NOx Water Heater

The performance of this series of Ultra Low NOx Emissions from Whirlpool 6th Sense technology is truly innovative, as it is designed to offer a combination of varied features and characteristics.

The water heater features the unique Flame Lock Safety System, which helps in minimizing the risk of flammable and vapor related fires. This patented technology helps in trapping the burning vapors within the combustion chamber through a specialized flame-trap.

Therefore in the most literal sense, the burning vapors get destroyed through burning themselves completely.

If there is any kind of a flammable vapor occurrence, then in such a scenario the Flame Lock Safety System disables the water heater by switching off the gas supply to the water heater's burner and pilot. This prevents any kind of re-ignition of the flammable vapors.

In this manner, the Whirlpool gas water heater remains quite safe and the chances of anyone being harmed by it are minimal. This is undoubtedly an important aspect and when you combine this patented technology with self-cleaning feature, this innovative Whirlpool tall water heater is truly remarkable.

Specific Models of Whirlpool Gas Water Heaters With Ultra Low NOx Emission

Model Number	Family Size	Energy Factor	Gallon Cap.	Self Cleaning	BTU Input/Hour Natural Gas	Warranty
NU30T61-303	1-2	.61	30	no	30,000	6 Years
NU40T61-403	3-4	.59	40	no	40,000	6 years
NU40T62-403	3-4	.62	40	no	40,000	6 Years
NU40T121-403	3-4	.59	40	YES	40,000	12 Years
NU50T61-403	5+	.58	50	no	40,000	6 Years
NU50T91-403	5+	.58	50	YES	40,000	9 Years
NU50T121-403	5+	.58	50	YES	40,000	12 Years
NU50T122-403	5+	.62	50	YES	40,000	12 Years

Operating Review of This Whirlpool Gas Water Heater

This series of Ultra low NOx water heaters are extremely environmental friendly and do not allow the flammable vapors to enter into the ignition chamber. The water heater features quality burner construction, which implied the quality grade materials, can withstand extreme temperatures.

The self-cleaning technology ensures that the water heater is not clogged with any kind of lime and sediment buildup. This also allows the heating elements to function efficiently and thereby enhance the energy savings.

The patented Flame Lock System ensures that the gases and vapors combust inside the combustion chamber rather than escaping outside the chamber. These features ensure that any homeowner deciding to purchase a water heater finds all his or her requirements met when choosing this particular model.

Undoubtedly, this particular series of ultra low NOx water heaters from Whirlpool 6th Sense technology perfectly fits all the requirements of residential consumption.

But if I had to pick one, knowing myself I would choose the NU40T121-403 which is a self cleaning unit, 40 gallon with lower energy factor. I have a family of four and not emptying the tank on any regular basis is one of my many faults.