Client hired Largo Green, Inc. (LG) to assess, design, & implement an HVAC solution for his 2-story, new-construction, bayside house. The original house was 1-story; a middle floor & top floor was added later. The challenge was how to get the cool air up to the 4 rooms above. LG designed a very long, vertical, supply plenum, built to extend from the mezzanine-up through the 2nd floor closet to above the top floor.