When the time comes to make the replacement decision of your home's heating, air conditioning, and indoor air quality products, weigh all of your options. How long do you plan to stay in your home? How high are your utility costs? Does anyone suffer from allergies or asthma? What temperature do you like to keep your home? Does that vary by time of day? Do you have any uncomfortable rooms or spaces in your home? Are you concerned about global warming? What is the life cost of these new products? Is your home dusty? Do you get electrostatic shocks or bloody noses? Does the sound of your current system annoy or concern you? This is a small part of all the questions to be answered as you make an informed buying decision.