flueless

As adjectives the difference between flueless and clueless

is that flueless is without a flue while clueless is lacking knowledge or understanding; uninformed.

As adjectives the difference between fluxless and flueless

is that fluxless is (of a soldering system) that requires no flux while flueless is without a flue.

As adjectives the difference between glueless and flueless

is that glueless is without (the use of) glue while flueless is without a flue.

As a noun flue

is a pipe or duct that carries gaseous combustion products away from the point of combustion (such as a furnace).

As an adjective flueless is

without a flue.