Quote Originally Posted by karynfab View Post
I spoke with my contractor and electrician and went thru your list and his main concern was that a simple dehumidifier wouldn't get all the moisture out.
He's right. It couldn't begin to keep up during use periods


I live in NY and was only going to heat garage 30 minutes before swim and during.
Yikes! That GUARANTEES cold walls and wires, resulting in MAXIMUM condensation!


My contractor believed if I got a indoor EXPENSIVE pool dehumidifier (which covers almost 1500 sq) that I would not need to worry about changing the existing wires in the garage.
Wrong! Those systems are expensive, confusing, and hard to maintain. Few people -- including hospital maintenance staff! -- have been able to understand them well enough to operate them effectively.

A MUCH better choice for you, given intermittent heating, would be an OLD-STYLE gas heat system with 100% outside air, and a matching powered exhaust vent. This would come much closer to maintaining reasonable humidity levels during use.

There are some aluminum wires in the ceiling presently. Another concern is we have our cable box and garage door opener in the garage.
"Aluminum", spelled "F I R E". I thought you were taking over the garage? Replace the door with removable panels. The opener AND the tracks are likely to corrode.

We are going to vapor barrier all the walls, ceiling. Of course moisture resistance sheet rock. I am getting a price quote to change all the wires.
OK, good.

You might be able to get a successful installation if you
  • move 100% of the wiring and switches OUTSIDE the pool room, leaving only the cable from the pool, and the (sealed!) light fixture in the room.
  • install 100% outside air heat, with 105% powered exhaust
  • seal the room off room from all other equipment, wiring, tracks, operators, lights, etc.

Of course, a functionally superior way (though probably architecturally unacceptable!) would be a freestanding double wall polycarbonate 'greenhouse' enclosure, using treated wood and SS fasteners, with gas heat. That would completely eliminate the problems