If you would like your central heating and air conditioning system to stay working without any air flow issues one thing you need to remember to do is to have your ductwork cleaned at least twice a year.
Having your ductwork cleaned at least every 5 months will ensure that you will not have any air flow issues.
In addition to having the ductwork of your central heating and air conditioning system cleaned every single 5 months, you should also make sure and have your central heating and cooling unit tuned up and checked up by your local heating and air conditioning professional before every season begins. This along with the ductwork cleaning every 5 months will more or less come close to guaranteeing that your HVAC system will not have any breakdowns what so ever and that your heating and air conditioning will be able to get you through those rough weather seasons with pure indoor comfort. When it is cold out you will always have fully working central heating and when it is hot out you will always have fully working central air conditioning if you follow those 2 steps that I suggested. Again, the first is to have your ductwork cleaned every 5 months and then the second is to make sure and get your central heating and air conditioning system tuned up and checked up before the beginning of every single season in the year. Trust me I know what i am talking about because it has always worked for me!