Exhaust vent hole doesn't line up with the new range hood
When a new range hood doesn't line up with the existing exhaust hole, homeowners are forced to route ductwork through cabinets or risk weakening the wall with multiple new holes. Small misalignments happen easily due to measuring errors or shifting layouts, leaving people searching for the easiest way to vent without compromising structural strength.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Exhausting through the top and routing through the cabinetDid this help you?
- 2Cover the misaligned hole with a raceway or cable coverDid this help you?
- 3Notch the back of the raceway where the cable exits to align it cleanlyDid this help you?
- 4Oval the hole slightly with the drill bitDid this help you?
- 5Patch the blowout and work with the existing holeDid this help you?
- 6Pinning the ducts near eave or peak vents in a naturally vented space.Did this help you?
- 7Routing the ducts to a roof or gable wall to push humid air completely outside.Did this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“The hole that was there from the microwave won’t be centered with the hood so seems like my only option is to exhaust through the top and through the cabinet? what’s the easiest way to do this?”source ↗
“I ended up ~1.5cm off in both directions (wall 28cm).”source ↗
“I'm worried I could be just poking with too many holes and weaken the structural strengh.”source ↗
“I did something similar running coax through my exterior wall last year. Marked everything twice, measured three times, still ended up a half inch off because the bit walked on a hard spot in the mortar.”source ↗
“But now seeing this actually in person and realizing there's no real vent hookup that these two could attach to, I'm unsure how to proceed.”source ↗
“With that being said, am I able to just leave the ducts as they are or should get some steel straps and attach the ducts to the rafters so that they are off the attic insulation?”source ↗
Where this came up
People with this problem also raised
- 4Landlord installed a dangerous makeshift furnace exhaust vent
- 6How to patch an inaccessible vent pipe
- 12How to find replacement parts for a rusted water heater vent pipe
- 3Roof vents installed off-center and poorly aligned
- 4How do I replace a dryer vent cover with weird dimensions?
- 2How to route a plumbing vent offset around obstacles