How do I combine two internal masses?

Hi everybody,
I need to creat 2 internal masses separately for internal and external walls. When I create them like this:
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I get 2 different monthly results like this:

Can you please help me with how I combine these into one and have one result? Thanks in advance

@Erato3d

Are you inserting the same set of HBZones into both internal mass components?

If so, you can fix this by connecting the components sequentially (like a series circuit), like this:

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Thank you very much it solved :blush: :pray: