Overview of Ruud Ultra Low NOx Units Quiz

What is the minimum inlet gas pressure as specified by manufacture.

 A blinking flame let indicates?

 How often should venturi filter be cleaned

What information do you need to select proper orifice size?

This ULN furnace can be installed up to 5500 Ft. above sea level

The BTU input can be with in          % of the units data plate

 CL on the furnace display indicates

The flame sensor can be removed for cleaning?

 what is the nominal gas pressure on an install below 2000 FT. elevation?

All furnaces come with a 4” vent connection