You should change the air filters in your air conditioning unit every one to three months, depending on usage and the type of filter you have. Dirty filters can reduce the efficiency of your system and lead to higher energy bills.
It is not recommended that you install an air conditioning unit yourself unless you have experience and knowledge in HVAC systems. Poor installation can lead to inefficient operation and even safety hazards.
To improve the energy efficiency of your air conditioning system, you can seal air leaks around windows and doors, insulate your home, use a programmable thermostat, and regularly clean and maintain your unit.
No, air conditioning units require electricity to operate, so they cannot be used during a power outage unless you have a backup generator.