No, it is not recommended to run the exhaust vent from a portable Frigidaire air conditioner into your attic. Attics are not designed to handle the excess heat and moisture generated by an air conditioner. Venting the exhaust into the attic can lead to several issues. Firstly, it can cause a buildup of heat and humidity in the attic, potentially damaging the insulation and other materials. This can also promote the growth of mold and mildew, which can be harmful to your health and cause structural damage.
Additionally, it can disrupt the overall airflow in your home, making the cooling less efficient. It is crucial to properly vent the exhaust outside through a window or a dedicated venting system to ensure effective heat dissipation and maintain a healthy indoor environment. Consult the manufacturer's guidelines or a professional HVAC technician for the recommended exhaust venting options for your specific portable air conditioner model.