| Direct Fired Make-Up Air Units | |
  | Direct Fired Units (Outdoor)- Click on the image for access to preliminary drawing for the V1-V5 direct fired units. |
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| Direct Fired Units (Indoor)- Click on the image for access to preliminary drawing for the V1-V5 direct fired units. |
| Direct Fired Make-Up Air Unit Curbs | |
 | V1 | Curb V2 | Curb V3 | Curb V4 | Curb V5 | Curb |
 | V1 | Common Curb V2 | Common Curb V3 | Common Curb V4 | Common Curb V5 | Common Curb |