The performance of your air conditioning system is not as short-term as “will it keep my house cool today?” Great AC performance is about getting the most from the system each year for the lowest cost, and then keeping that performance level for the next year, and the next, until the point where replacement is the cost-effective next step.
When you take this long view of air conditioning performance, regular duct testing becomes a vital part. We recommend homeowners have this service done every 3 to 5 years—or right now if they haven’t done it already.
It’s probably going to be the last month you will run your furnace for a good long while. You have a few more days left, and it’s easy to think that it doesn’t matter much if the furnace isn’t working as well as it usually does.