Product review (5 stars): Instructions for installing are not with the product!
I have yet to observe the functionality of the product because I have no instructions for installing from the manufacturer, nor can I find any instructions online. I have emailed Amazon so as to be contacted by them or the manufacturer. I will change my rating when satisfied with the response and acquirement of instructions.

More later...

... (later) After several minutes of searching the web for the AKDY Home Improvement website, I found it as well as their phone number and direct support email:

(Phone: 626-453-0550 Email: Support@akdytrading.net)

The gentleman was already reading my email request for acquiring instructions to install the item and stated he would send it asap.

More later...

... (Later) Well, the AKDY hood was installed today, by one person. The only change the contractor made was to replace the accordian-like expandable plastic vent that came with the hood, with an aluminum smooth vent. He said the plastic ribs would act as 'grease traps'. The hood looks good...has an Art Decco-like appearance. Sleek and functional.