B7-Attic Heating and Ventilating Color _11469.pdf

This is an architectural floor plan for a heating and ventilation system at Building No. 7 in Bedford, Massachusetts. The document is titled "Heating & Ventilating Attic Floor Plan" and shows the layout of mechanical systems serving both Building No. 7 and an alteration to Building No. 7/60. The plan uses color coding to indicate different system components: green represents the primary ventilation ductwork, red shows supplementary piping or distribution lines, yellow highlights the perimeter system or return air pathway, and blue indicates additional mechanical elements. Various technical annotations and measurements are distributed throughout the drawing, detailing duct sizes, connections, and system specifications. The plan includes a compass rose indicating directional orientation and a reference box in the lower right corner providing project information, including the drawing number 11469 and reference designation 7-HS. This appears to be a construction or renovation document from the Veterans Administration, as indicated by the institutional seal present on the blueprint.