On the summary sheet in the last column  "n/a" data appears even if the Voz values are filled in the other sheets. We can't find the solution.  Could somebody help me?

Hi!

Do you have to have MERV 11 filters installed in the ventilation unit that is connected to a garage?

Question: Is it necesary to hard duct ventilation air into each bedroom within the apartment?

Hello, 

We have a 6 storey addition to an existing 4-storeyed building. The mechanical systems for the addition are separate from the existing systems.

Dear All,

Hi,

Hello everyone,

In Europe which parameters shall be considered to establish whether the site is non-attainment area for PM2.5?