Example - for a 3-bedroom, 2,000-sq.ft. home, with an exhaust-only ventilation strategy, and a target ventilation rate of 50 CFM you would need to install a 50 CFM fan with an adjustable-speed DC motor for continuous operation.
Quick Answer. Trenches were built during World War I to protect stalemated troops on both sides from artillery and rifle fire. Although the war began with rapid movement of the German army, when the Allied forces stopped the Germans, both sides dug trenches to help avoid losing territory they had gained.
, One time sexual abuse victim. The purpose of propaganda is to provide civilians with information that is slanted,biased and/ or untrue,with the ultimate goal to make the receivers think what you want them to think,believe,what you want them to believe,or do,what you want them to do.