Never try to vent a portable ac unit through a functional working chimney or fireplace that s a huge safety risk.
Ac unit without window vent.
These portable ac units don t have a hose and deliver cool air in your home by evaporating water.
This will allow you to get the air exchange you need for your air conditioner.
You can vent the hose to other rooms such as the garage or laundry room if those are your only options.
You can pipe the hot air out through a chimney.
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There s one more way that you can vent a portable ac unit and get rid of that hot air in a windowless room.
You can use this procedure to vent your portable ac unit to the outside or to another room like storage space a laundry area or garage.
Venting a window air conditioner the best way you can vent a room without a window is by creating a vent in a wall.
However it absolutely must be an unused chimney in an unused fireplace.
Evaporative air coolers offer a ventless portable air conditioner option.