While it
is hard to tell exactly from the picture, this appears to be the Jenn-Air® 36”
Custom Hood Liner. The overall dimensions of the Custom Hood Liner are 35
7/8" x 22". The size and shape of the decorative hood that houses the
Custom Hood Liner is at the discretion of the consumer. The installation
requires a minimum distance from the Custom Hood Liner to the intended cooking
surface of 24" (61 cm) for electric cooking surfaces and 30" (76.2
cm) for gas cooking surfaces. Moreover, the suggested maximum distance between
the Custom Hood Liner and the intended cooking surface is 36" (91.4 cm). To learn
more about this product and view its installation, use & care, and
dimension guides, please visit: https://jennair.com/appliances/details/JXL6536CSS/displaymodel/JXL6536CSS 

Hi, Thanks for the question and sorry for the delay in getting back to you. And thank you Jenn-Air for providing the answer above. Good luck with your project!