differential

Homework / test English to Romanian Tech/Engineering Engineering (general) air hanling units

The text is an operation manual for air handling units. Tge word appears in context like these:

If the freecooling or freeheating condition are satisfied the fresh air damper will be opened according to the request calculated comparing the room air temperature to the summer set point for freecooling bearing in mind the damper differential.

If the unit has a 3-ways mixing box, the air quality sensor manages the damper's opening according to the set point and its differential.