Ultra Low Nox Water Heater Meaning

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Ultra low nox water heater meaning.

The difference between low nox and ultra low nox is determined by local epa standards and based on the type of heating equipment. Gas fired unflued gas heaters. When it comes to low nox it can reduce the emission of nox to 30 pm. Nox emissions standards for water heaters hd supply carries low and ultra low nitrogen oxide nox water heaters that comply with the emissions standards set by california and texas.

These gases are released when fuel is burned at high heat like in an engine or home gas furnace. Gas fired storage water heaters. They are designed to comply with regulations in certain air quality districts in california and were sold primarily in california. All other states require standard models.

Low nox equipment uses fgr and is able to maintain 3 to 5 excess oxygen with strong controls. Low nox and ultra low nox refers to emission limits on these products and are determined by local epa standards and will vary for each type of heating equipment. For ultralow nox the emissions are between 7 to 15 ppm. Ultra low nox some states and municipalities are requiring water heaters furnaces and other types of machinery burning natural gas to be certified as ultra low nox miscellaneous unit measures add to my list.

By definition unflued low no x gas heaters are 100 efficient as all heat energy released from the flame is converted to useful heat. Nox is an abbreviation for nitrogen oxides a collection of harmful and toxic greenhouse gases. Gas fired flued gas heaters. This recall includes 30 40 and 50 gallon natural or propane gas fired ultra low nox emission gas water heaters.

For example it s not uncommon to see an ultra low nox water heater that emits less than 10 nanograms of no2 per joule of heat output 10 ng j.