You will want to run a dehumidifier in the summer because if you bring air in from outside it will contain humidity possibly more than what is already in the basement.
Air exchanger or dehumidifier.
I would recommend not running the dehumidifier in the winter.
The heat exchanger is not 100 effective so there is some sensible cooling from the sd 12 in addition to the dehumidification.
Dehumidification should be done by a dehumidifier and fresh air exchange should be done by an air to air exchanger hrv erv etc.
Indoor air contamination continues to rise with time and oxygen levels continue to fall a fresh air exchange is crucial to good long term health.
Call your contractor and have him check it out.
Tjernlund makes a good one.
Since it is a basement the dehumidifier is not a bad thing.
In our climate zone the best equipment for ventilating your home and dehumidifying indoor air is a whole house dehumidifier with positive pressure from fresh outdoor air.
Air conditioner dehumidifier can be one and the same because the same component found in a dehumidifier is also found in an ac.
Like an erv a ventilating dehumidifier introduces fresh air from outside your home filters it and removes indoor air for consistent circulation.
Try the air exchanger.
The energy from the warm humid air in the swimming pool room is recovered in the heat recovery section normally in a plate heat exchanger.
Ac dehumidifier also has a condenser evaporator and metering device to gauge the air in the room.
If the smell occurred right after you installed the exchanger i would suspect the exchanger either smells or is pulling air from an area that smells.
Cooling dehumidifier heat exchanger main features finned tube heat exchanger type for dehumidification of air by means of condensation by using ice water or other cooling media flowing through the heat exchanger tubes followed by a demister and re heater steam or hot water to heat up the air above the dew point.
In a ventilation dehumidifier equipped with a heat pump the heat pump functions both as a dehumidifier and a dedicated heat pump.