19+ Roof Mounted Ductwork PNG

My question revolves around the ductwork meeting the roof.

19+ Roof Mounted Ductwork PNG. Mounting the wall bracket mounting the microwave connecting the ductwork Alibaba.com offers 1,416 roof mounted hvac products.

Ductwork High Resolution Stock Photography And Images Alamy
Ductwork High Resolution Stock Photography And Images Alamy from c8.alamy.com
Good duct practices should be followed for all ductwork. My question revolves around the ductwork meeting the roof. But the issue is, if i were to have the ductwork go vertical from the hood and up through the roof for maximum airflow, the vent would be approximately where the i don't know it's cfm but it has a commercial roof mounted 1hp blower.

It looks like it isn't set up to mount directly to the ductwork, rather it gets placed over it.

Roofing products residential roofing products ductwork. Most rv ducts are not very well insulated, so part of the coldness produced by the air conditioner is lost to the outside as the air travels through the ductwork. About 11% of these are hvac systems & parts. Good duct practices should be followed for all ductwork.