Combustion products such.
Range hood that goes through roof.
Another consideration is where to vent the hood.
The best exhaust fan venting is through smooth rigid ducts with taped joints and screwed to a special vent hood.
Range hoods are typically vented using a special duct work that runs through a roof and less often through an exterior wall of your house.
For the range hood duct vent is it more effective to go straight up to the roof or go up then bend 90 degree to vent out of the exterior wall.
The duct work is usually concealed within the walls and it is really important to make everything air and water tight.
Exhaust hoods over ranges once considered an accessory have become standard equipment in modern kitchens.
As a result it looks awful from inside the house since it abuts a beam that runs across the kitchen ceiling.
Vent your bath and kitchen exhaust fans through the roof through a special roof hood.
While this can be done through the ceiling and out through the roof it s best to go through an outside wall because there s less need for waterproofing.
Do vertical ducts for range hoods have to go through the roof.
My range hood was vented through the roof but is not centered over the range hood.
If you decide to vent through the roof go all the way out to clear air through the roof and don t just vent it into the attic.