Downdraught is a alternative form of downdraft.
As nouns the difference between downdraft and downdraught
is that downdraft is a strong, downward air current; an air pocket or air hole while downdraught is an alternative spelling of downdraft.
downdraft
English
Alternative forms
* downdraught
Noun
(
en noun)
a strong, downward air current; an air pocket or air hole