  We re-examine a recent claim by Han et al. (2002) that the ionization energy
in the envelope has to be included in the ejection criterion of common
envelopes. In particular, we argue that (1) they include a mass loss rate prior
to the onset of the common envelope that is too low; (2) They do not include
the energy radiated by the accreting white dwarf companion, as well as that
emitted by the core of the giant star; and (3) As argued by one of us before,
the opacity in the envelope is too low for the efficient usage of the
ionization energy.
