If we’re talking HVAC, age is not just a number. It’s not always obvious knowing when and whether you should repair or replace your home’s heating and cooling system, especially when faced with an emergency situation. While there is no “for-certain rule” for replacing your HVAC, there are many signs and considerations to keep in mind to aid you in making the decision of replacing your HVAC. Check out 10 signs it's time to replace your HVAC!