LTNman
Several airports have remote aircraft de-icing facilities but they are not routinely used unless the weather dictates it. This morning's slight frost with no precipitation likely didn't warrant their use as hold over time following de-icing is much longer than when precipitation occurs. In a beast from the east type weather situation it's possible they would have been used but there are so many variables involved before deciding whether there is any benefit in using them over remaining on stand for de-icing. This winter so far being so mild has not warranted any airport's using their remote de-icing facilities.