Most heating and cooling components these days are designed to last for up to 20 years. Nonetheless, each homeowner will eventually be faced with replacing their HVAC system. This endeavor is a major expense, however, current systems operate much more efficiently than the older units do. It’s always a wonderful idea to start your search for an HVAC replacement system by asking friends and neighbors what supplier they would recommend. If they were ecstatic with their HVAC supplier, schedule multiple companies to come to your home and provide you a written quote. When picking a supplier, remember that sizing an HVAC unit to the home as well as its existing ductwork requires skill and experience. When sizing an HVAC unit, a reputable supplier will advise you of energy-saving measures, such as adding a layer of insulation to the attic. These should allow you to buy a smaller HVAC unit, but be aware that a programmable temperature control that contains a timer is the bare minimum that you should have. Once you get a written estimate, do your research on the components and energy efficiency. Read up on HVAC terms such as Seasonal Energy Efficiency Ratio (SEER), Tonnage, and Annual Fuel Utilization Efficiency (AFUE). The SEER rates how many BTUs an HVAC unit will remove for each watt of electricity consumed. Tonnage refers to A/C tons–1 ton equals 12,000 BTUs per hour. Moreover, the AFUE estimates how much heat the unit delivers for every dollar spent on fuel. These terms allow you to compare systems using their unique ratings. After all, doing just a bit of research will benefit you and the comfort of your home for years to come.