Better with every breath.

NOx causes respiratory problems — such as wheezing, coughing, colds, bronchitis and worsened asthma — and is harmful for vegetation.

California lowered NOx emission limits from 40ng/J to 14mg/J for all natural-gas-fired, fan-type residential central furnaces within certain parts of the state.

An installation uncompliant with these new emissions standards is liable for a fine of up to $450 if not corrected by October 2019.

Learn more South Coast Air Quality Management District (SCAQMD) emissions limits.
Learn more about San Joaquin Valley Air Pollution Control District (SJVAPCD) emissions limits.

Counties and areas where 90% condensing and 80% non-condensing gas furnaces must meet the 14 ng/J NOx limit requirement. Counties and areas where 90% condensing and 80% non-condensing gas furnaces must meet the 40 ng/J NOx limit requirement.

Why choose a Lennox Ultra-Low NOx solution.

Lennox is the first and only manufacturer with a full line of ultra-low emissions furnaces.

Lowest emissions

Lennox Ultra-Low NOx furnaces produce 65% less NOx emissions than a low NOx furnace.

Lower Bills

They are more cost effective, creating projected 25% heating cost savings over an average year.

Lennox Solutions

Products that offer ultra-low emissions

Recognized for leading the way.

For over a century, Lennox has been committed to transforming people’s lives. Every year, leading institutions recognize Lennox for our innovative initiatives in product design which help homeowners define what perfect air means to them. Here is a look at some of the recognition we’re proud to have received for our ultra-low NOx furnaces.