Thanks for the comments. We will check with the suppliers and get back to you as soon as possible. We will also double check for the 1.20 x 1.20m sizing requirement again.
For the installation of the dumbwaiter, we will need:
1) Take down ceiling in the room to see the M&E services
2) Relocation the M&E services
3) Strengthen the upper slab structure to support the dumbwaiter
Could you make sure the ceiling M&E services can be relocated and the structural can be strengthened before the dumbwaiter is ordered. If possible please give us the M&E relocation design to study.