Do what your utility company and air conditioner manufacture suggest and have your comfort system tuned up. For just $79 a tune-up by Gallagher's will reduce your utility costs and extend the life of your comfort system and if you act now and I will include a complete duct inspection ($59 value) of your air duct system absolutely FREE.
Have Gallagher's install your new energy efficient windows and save $125 per window this summer.