We classify the air curtains advantages in 4 groups:
Hygienic and healthy atmosphere
To achieve those advantages it is absolutely necessary to select the right air curtain.
If we select a wrong unit the air jet won’t reach the floor and the separation of two adjacent areas will disappear. Then all heated/cooled air will cross the doorway and we will loose energy and all other advantages.
Some people only care about the air curtain price and select a less performance or inadequate air curtain, following sometimes other seller recommendations. Being confident you should always compare the characteristics of the air curtain, especially the kind of fans used and the air volume.
At the end if we calculate the amount of money of the air curtain and the energy savings we will achieve that selecting the wrong unit can be more expensive and moreover the end client won’t be satisfied.
In conclusion, on open doorways it is highly recommended to use an air curtain because of the many benefits.