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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. Both commercial grade and residential water heaters must meet lower emissions standards in those states. All other states require standard models.
Shop All Water HeatersCommercial Water Heaters
Low NOx commercial water heaters are required in Texas and ultra low NOx water heaters are required in most of California.
Shop Low NOx Commercial Gas Water HeatersResidential Water Heaters
Residential water heaters in California must be ultra low NOx — all other states require standard models. Ultra Low NOx emissions standards are required in these California air quality management districts:
- Bay Area AQMD (Reg 9, Rule 6)
- Sacramento Metropolitan AQMD (Rule 411)
- San Joaquin Valley APCD (Rule 4902)
- Santa Barbara County APCD (Rule 352)
- South Coast AQMD (Rule 1146)
- Ventura County AQMD (Rule 74-11)
- Yolo-Solano AQMD (Rule 2.37)