  We report the study of Nernst effect in quasi-low dimensional tungsten bronze
P4W12O44 showing a sequence of Peierls instabilities. We demonstrate that both
condensation of the electronic carriers in the CDW state and the existence of
high-mobility electrons and holes originating from the small pockets remaining
in the incompletely nested Fermi surface give rise to a Nernst effect of a
magnitude similar to that observed in heavy fermion compounds.
