Helen Shiner Feb 2, 2020:

Hmmm I’m afraid ‘insert module’ doesn’t sound right at all. Too close to the German in a very literal sense. As Wendy says, is there any evidence of it being used in an architectural context?

Wendy Streitparth Feb 2, 2020:

Are there any reliable references for this solution, other than in an electrical sense?

Steffen Walter Feb 1, 2020:

Perhaps ... ... a new module/unit/addition embedded/integrated in(to) the existing building/structure. Please provide the complete German sentence - I second Helen's request.

Helen Shiner Feb 1, 2020:

Suggestion I’ve seen numerous references to modules “nested within” existing buildings. I don’t know if you need to stick with a noun or can rephrase. Anyway, please provide the sentence including this term, preferably with surrounding sentences, so we can help you properly.