Ye gods you're really putting me on the spot here - and if I get shot down I'll probably deserve it
I think that (2) would be best with the gap plugged with fire clay cement.
However.... The pipe outside would be as hot as hell, must be guarded against people touching and also needs to be kept away from the building - especially the eaves - for risk of fire. The terminal needs to have a cowl with bird guard.
Is the property in UK (Hetas guidelines) or Espana?
John
I think that (2) would be best with the gap plugged with fire clay cement.
However.... The pipe outside would be as hot as hell, must be guarded against people touching and also needs to be kept away from the building - especially the eaves - for risk of fire. The terminal needs to have a cowl with bird guard.
Is the property in UK (Hetas guidelines) or Espana?
John