Comprehensive nutrition resource for Sonic Chocolate Shake - Regular. Learn about the number of calories and nutritional and diet information for Sonic Chocolate Shake - Regular. This is part of our comprehensive database of 40,000 foods including foods from hundreds of popular restaurants and thousands of brands.
Duct BlasterÂ®. 1  A Duct Blaster is used to directly pressure test the duct system for air leaks, much the same way a plumber pressure tests water pipes for leaks. 2  The Duct Blaster fan is first connected to the duct system at the air handler cabinet, or a return grille. After temporarily sealing all remaining registers and grills, the Duct Blaster fan is turned on to force air through all.
2. Check the filter. A clogged filter will make every duct seem blocked. To make sure the filter is not the culprit, remove it completely during the duct blockage test. If any of the vents continue to have restricted airflow, a duct leading to that vent is blocked.heck the filter. A clogged filter will make every duct seem blocked. To make sure the filter is not the culprit, remove it completely during the duct blockage test.