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.
You must have the pilot lit and the burner on for this test so that gas is flowing through the large tube. Reopen the shutoff valve, relight the pilot, then turn the control valve to âonâ. When the gas burner comes on, use a 50/50 dish soap/water mix to test the screw joints for air bubbles that indicate leaks.