Ultra Low Nox Water Heater Requirements

I d like to answer a few of the questions i ve heard from members of the public about the switch to ultra low nox water heaters.

Ultra low nox water heater requirements.

The state of utah has requirements limiting the nox nitrogen oxide emissions of gas water heaters. This recall includes 30 40 and 50 gallon natural or propane gas fired ultra low nox emission gas water heaters. Certain counties in the state of california are required to meet south coast air quality management district s nox emissions requirements. Shop all water heaters commercial water heaters.

Or an equipment grounding conductor must be run with. Ultra low nox water. Our low nox solution. Both commercial grade and residential water heaters must meet lower emissions standards in those states.

For ultralow nox the emissions are between 7 to 15 ppm. Are lower nox emitting water heaters commercially available now. The burners use fgr adjusted fuel air ratios plus a staging in order to have low emissions. California s south coast air quality management district scaqmd and the san joaquin valley air pollution control district sjvapcd introduced ultra low nox rule 1111 and rule 4905 respectively which require nox emissions of less than 14 nanograms per joule.

Grounding instructions this water heater must be grounded in accordance with the national electrical code and or local codes. Please refer to the authority having jurisdiction for guidance. All other states require standard models. The turndowns are less than the ratio of 8 1.

They are designed to comply with regulations in certain air quality districts in california and were sold primarily in california. These must be followed in all cases. The ultralow nox can have 5 to 9 emissions of oxygen a turndown ratio of 4 1 or 3 1. Low nox commercial water heaters are required in texas and ultra low nox water heaters are required in most of california.