_______ is the pressure difference created by a vent or chimney because of its height, and the temperature difference between the flue gases and the atmosphere:

For battery storage rooms continuous ventilation shall be provided at a rate of not less than ____ cubic foot per minute per square foot

The inlet to an exhaust system shall be located in the area of heaviest concentration of contaminants:

Cloth dryer Exhaust ducts shall be supported at _____ intervals and secured in place:

The design temperature of air to be conveyed in flexible air ducts and flexible air connectors shall be less than ______ :

Where a smoke damper is installed within an unducted opening in a wall, a spot-type detector listed for releasing service shall be installed within _____  horizontally of the damper:

Vents shall terminate not less than ______ in vertical height above the highest connected appliance flue collar:

Connectors shall rise vertically to the chimney or vent with a minimum pitch equal to ______ unit vertical in 12 units horizontal: