I don't believe that is true, at least according to a contractor I spoke with. The issue of raising the floor comes down to how far above grade it is. If it is far enough above grade then you don't need to raise it if you are installing a mini-split system. At least, this is how it was explained to me by someone who I believe understands the building codes. A vapor barrier is required either way.
Quote:
Originally Posted by billethkid
The raising of the floor became a new regulation very early this year in Sumter county.
Required if going to have space air conditioned.
Usually Putting AC without double pane and low E glass is a major opportunity for heating and cooling losses with much higher utility bills.
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