  Models with extra gauge symmetry are well-motivated extensions of the
Standard Model. In this paper, we study an extended gauge model with a heavy
neutral gauge boson $Z'$ which is fermiophobic. Thus, the production of such
particles can occur via vector boson fusion, with subsequent decays into $WW$
or $Zh$. We investigate the collider phenomenology of such $Z'$s in the context
of both the 14 TeV LHC and the future CLIC. We find that looking at $\ell\ell b
b$ final states provides a rich opportunity to discover such new vector bosons
where conventional search strategies in the dilepton channel would fail. In
particular, we optimize our analysis by putting in kinematic cuts deriving
model-independent values of $\sigma\times$BR needed for a 5$\sigma$ discovery
at the LHC. We then translate this into the parameter space of a specific model
for illustration purpose -- our results show that fermiophobic $Z'$s are
discoverable in the $\ell\ell b b$ channel for wide range of parameter values.
