Here’s something to bear in mind the next time you reach for your duct blaster: At Recurve, we’ve found that using a duct blaster to diagnose leaks isn’t always time well spent. And we all know that in the Home Performance business, time is money.

The problem is that you can spend hours in cramped spaces sealing ducts only to find that there’s little real improvement in leakage levels, and using a duct blaster to locate leaks is a slow process. The alternative? Using a pressure pan in conjunction with a blower door can help you quickly zero in on leaky duct runs that need the most attention, so you can achieve good results in much less time.

Assuming you’re already running a blower door on most of your projects (or have one easily accessible), a pressure pan can take the place of a duct blaster for determining the highest priority areas to seal. With the house prioritized to 50 Pa by the blower door, record the pressure drop with the pressure pan when it covers the register. A large pressure drop (3-6 Pa) indicates that significant leakage is occurring close to that location. A small pressure drop will indicate there is no leakage in that duct run, or that the leakage is far away.

Don’t get us wrong—duct blasters are essential equipment in situations where you need to perform a rigorous leak test. But this quick pressure pan test can save an hour or more compared to taping off the registers and running a duct blaster test, and anything you can do to achieve the desired results in less time will benefit both you and your clients. The bottom line: Knowing where to focus your energy to save your clients’ energy can give you a real competitive advantage.