20" X 20" Steel Access Panel Removable Door For Wall / Ceiling Application (Lock and Key) With Frame - [Outer Dimensions: 21" Width X 21" Height] Compatible With Duct 6in Traditional HVAC systems were designed

Traditional HVAC systems were designed for cold air

actual front end outer dimensions are approximately 10 5/8" width X 18 5/8" height

75" width X 21

Rigid gauge built for durability and long life in mind

strong aluminum construction with smooth finished edges for easy and safe use

20" X 20" Steel Access Panel Removable Door For Wall / Ceiling Application (Lock and Key) With Frame - [Outer Dimensions: 21" Width X 21" Height] Compatible With Duct 6in Traditional HVAC systems were designed+ Product Details Size 20"w X 20"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 21" width X 21" height Installation Easy installation just screw the sides of the access panel frame into your duct hole see photos for example. Our HVAC Access Door can be used in both commercial and residential settings. Design Easy access removable door provides easy access removable door for HVAC, plumbing,