I just purchased a Fujitronic FA 1300 portable AC unit. My shop is a
very well insulated loft. My home is part of a homeowners association
that prohibits window and thru the wall units, so a portable with two 5
inch ducts complies.
I have found that I need very little heat in winter (Philadelphia
weather) because the lights, dust collector and motors add significant
heat. Conversely my cooling load is substantial, which is why I went
with a dual tube 13,000 btu/hr unit.
I've had the unit about a month and it works well. I keep a eye on the
dust filter and expect to have to blow out the coils periodically
although not yet. The unit does cool well. Before the unit I could
not work in the loft in the summer. Now it has been used almost daily.
I purchased my unit from the brilliant store based on price plus
shipping, no other experience, but the transaction was fine.