Mounting Blauberg decentralized fan - Which mounting foam?

Hello everyone,

We will soon be installing our decentralized ventilation system. We chose the Blauberg Vento fans because of their excellent heat recovery values...

Which mounting foam should be used to seal between the hole and the fan? Is there one that is particularly insulating?

Many thanks for your answers.

Best regards, Christian

Soudal Energy Construction Foam B2 Genius Gun 500 ml at OBI, Toom

Important: do not use a pressure-expanding 2-component foam here. These are also used for the installation of windows and doors.