what is Infiltration gain mean?

[th333]

I modeled residential building and calculated heating load of a room
and infiltration load is calculated too.

but I can not understand how infiltration gain is calculated.
the building which I made is 80m tall.
so I expected there would be a stack effect in the building and if stack effect is activated, the infiltration gain of each floor would be different.
but every floor`s infiltration gain is same, except 1st and last floor.
how can it be?

thank you for reading my word, and I am waiting your clear reply.

[PCully]

Infiltration gain comes from the Infiltration Air Exchanges you have defined (the air flow, variation profile and condition of the air). If you have applied the same Infiltration air exchange to the rooms on each floor then you should find the air flow rates are the same (unless the variation is on some formula profile) but if the conditions in the rooms are already different then you would find the gain associated to that incoming air would vary.

If using air exchanges then there will be no effect on the conditions of the incoming air due to the height unless you specify it when defining and assigning different air exchanges.

If you take a look at MacroFlo then you can get a more accurate calculated crack flow base don the windows drawn in your model and it can also dynamically model the effects due to height, exposure (as defined in ApLocate >> Terrain Type) and climate conditions.

Phil