I have a partially finished basement with a room that is presently called "storage". I'd like to be able to add it to the total square footage of the home. It has no window but is heated, insulated, smoke detector and has a closet and two entrances and exits, one of which opens to another ventilated storage area that also contains the furnace, water heater and a door to the outside. To make it a permitted living area, it needs mechanical ventilation. I don't want it as a bedroom, just an exercise equipment area. Can I exhaust the vent fan into the ventilated storage area (easy to do) or does it have to vent to the outside (much harder to do)?