Oxigent reduction in cold room

[gwapa]

Dear Friends
I don´t know if these topics may be discussded in here.Please forgive me


We have a cold room at +2 °C for storage apples, peaches and avocados
The customer wants to avoy the fruts spoiled very fast
Some literature recomend to reduce the oxigen level inside the cold room .That is from 21 % to 15 % . We could achived that inyecting Nitrogen to get a room with 15 % O2 and 85 % N2


Question
Do you know a esy and econmical way to inyect the N2 to the cold Room?
are ther other methods ?