Hi all
The pipes for our ASHP are being fitted through an external rendered wall of our MBC timber frame. The external rendering is starting shortly but we haven’t had our airtightness test yet. We are hoping to get ASHP pipes in through the wall and fix grommets and tape in advance of rendering (after airtightness test) so that they a render around. There are so many different grommets and tape. We think we will go for Pro Clima but not sure which. Do we need different kind for external and internal? Thanks all.