Damp-chaser question

[Mark Dierauf]

  I installed a damp-chaser complete grand system, with an additional 36"
dehumidifier back before Christmas in a 5' Kawai grand. Although it seemed to do
very well through the dry New Hampshire Winter, a fresh tuning I laid on the
piano in April went nuts within a week. The customer understands that the April
tuning was done at just the wrong time, (the weather had just changed from
Winter dryness to Spring warmth & rain), but was hoping for a more dramatic
improvement in tuning stability.
  One intersesting point he made was that he has still been filling the
humidifier with water about once every two weeks (half the winter consumption
rate).  Should he just disconnect the humidifier unit once the central heat is
off for the season?
  The installation has two de-humidifiers, one located behind the belly rail and
the other just forward of the rear leg, but both mounted below the posts. Should
I perhaps be thinking of installing a short one up in between the posts? Or
replacing an existing rod with a higher wattage?

            Mark Dierauf