Multi-zone HVAC system

Abstract

A multi-zone HVAC system, including: (a) a hollow curb to be mounted to a building roof, (b) a hollow base mounted on or in the curb, the base having a paratition thereacross; (c) a hollow working unit mounted on the base, the working unit containing a cooling coil, a fan, and a heater so that return air from the building can pass through the curb and base to be heated or cooled in the working unit and then directed through the base and curb into the building, the portion of the base below the working unit having height of less than 24 inches.

1 . A multi-zone HVAC system, comprising: (a) a hollow curb to be mounted to a building roof; (b) a hollow base mounted on or in the curb, the base having a paratition thereacross; (c) a hollow working unit mounted on the base, the working unit containing a cooling coil, a fan, and a heater so that return air from the building can pass through the curb and base to be heated or cooled in the working unit and then directed through the base and curb into the building, the portion of the base below the working unit having height of less than 24 inches.  
   
   
       2 . The multi-zone HVAC system of  claim 1 , wherein the portion of the base below the working unit has a height of less than 20 inches.  
   
   
       3 . The multi-zone HVAC system of  claim 1 , wherein the portion of the base below the working unit has a height of less than 16 inches.  
   
   
       4 . The multi-zone HVAC system of  claim 1 , wherein the portion of the base below the working unit has a height of less than 8 inches.  
   
   
       5 . The multi-zone HVAC system of  claim 1 , wherein the portion of the base below the working unit has a height of less than 4 inches.  
   
   
       6 . The multi-zone HVAC system of  claim 1 , further comprising an aperture in the partition of the base and a bypass damper positioned at the aperture so that air can be recycled through the working unit.  
   
   
       7 . The multi-zone HVAC system of  claim 1 , further comprising a multi-zone damper positioned in the base so that airflow to the zones can be controlled.  
   
   
       8 . The multi-zone HVAC system of  claim 1 , further comprising a multi-zone reheater positioned in the base so that air flowing to a particular zone can be heated.  
   
   
       9 . The multi-zone HVAC system of  claim 2 , further comprising an aperture in the partition of the base and a bypass damper positioned at the aperture so that air can be recycled through the working unit.  
   
   
       10 . The multi-zone HVAC system of  claim 2 , further comprising a multi-zone damper positioned in the base so that airflow to the zones can be controlled.  
   
   
       11 . The multi-zone HVAC system of  claim 2 , further comprising a multi-zone reheater positioned in the base so that air flowing to a particular zone can be heated.  
   
   
       12 . The multi-zone HVAC system of  claim 3 , further comprising an aperture in the partition of the base and a bypass damper positioned at the aperture so that air can be recycled through the working unit.  
   
   
       13 . The multi-zone HVAC system of  claim 3 , further comprising a multi-zone damper positioned in the base so that airflow to the zones can be controlled.  
   
   
       14 . The multi-zone HVAC system of  claim 3 , further comprising a multi-zone reheater positioned in the base so that air flowing to a particular zone can be heated.  
   
   
       15 . The multi-zone HVAC system of  claim 4 , further comprising an aperture in the partition of the base and a bypass damper positioned at the aperture so that air can be recycled through the working unit.  
   
   
       16 . The multi-zone HVAC system of  claim 4 , further comprising a multi-zone damper positioned in the base so that airflow to the zones can be controlled.  
   
   
       17 . The multi-zone HVAC system of  claim 4 , further comprising a multi-zone reheater positioned in the base so that air flowing to a particular zone can be heated.  
   
   
       18 . The multi-zone HVAC system of  claim 5 , further comprising an aperture in the partition of the base and a bypass damper positioned at the aperture so that air can be recycled through the working unit.  
   
   
       19 . The multi-zone HVAC system of  claim 5 , further comprising a multi-zone damper positioned in the base so that airflow to the zones can be controlled.  
   
   
       20 . The multi-zone HVAC system of  claim 5 , further comprising a multi-zone reheater positioned in the base so that air flowing to a particular zone can be heated.