If you do not want it to be hot both inside and outside, then you need to look at some heating and cooling companies. They will be able to help you to keep your home cool when it is really hot outside. They will present different options to you and give the best recommendations for your home.
If you are looking to get a new furnace, but do not know where to look, try a heating and cooling company. Make sure to get estimates as well as to find the best person to do the work for you. You want someone you can trust and you can do this through interviews and research.