Draft detector. 8 3/4 in. x 3 3/4 in. x 3/4 in. Doors and windows are not the only places where heat and conditioned airm leakage occurs. There are many places around your house where energy is wasted. Is your home safe? Is it properly insulated? Find out with the draft detector which provides approximately 30 minutes of continuous, thick, safe environmentally friendly smoke or 60 smoke tests of 30 seconds. Excellent for testing air drafts, smoke detectors, air flow patterns, bathroom air fans, fireplaces and chimneys. Blue.
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