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| Tools & Home Improvement > Building Supplies > Heating & Cooling > Ducting |
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| Product Description The single pole, single throw, snap-acting switch is activated by a diaphragm with a factory installed sampling tube inserted directly into the duct or plenum. The Duct Airstat can be used to initiate such auxiliary devices as: Duct Boosters, Electronic Air Cleaners, Electrical Duct Heaters, and Humidifiers.Tjernlund Duct Airstat senses positive pressure in a forced air heating and/or cooling system. Tjernlund Duct Airstat Positive Pressure Duct Fan Switch (PS1503) Shipping Weight: 2 pounds | ||||||||
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