Document q7jVk6mQ2XDRDeZxd6KR6YRG

American Society of Heating and Ventilating Engineers Guide, 1929 Chapter I--Heat Losses from Buildings T a b l e 16. n f il t r a t io n through D o u b le H ung M e t a l Sash W indow s per F oot of C rackI 52 53