DUCT SIZING WORKSHEET

Step 1:Calculate Block Load

Heating Load:_____________________ Btuh Cooling Load:____________________ Btuh

Step 2:Room by Room Load

Room Heating Load (Btuh) Cooling Load (Btuh) Airflow (CFM )* Zone Number

____________ ____________ ____________ ____________ _____________

*Highest CFM determined from Heat/Cool Btuh

Step 3: Zone CFM totals

Zone 1 ____________ CFM Zone 5 _____________CFM

Zone 2 ____________ CFM Zone 6 _____________CFM

Zone 3 ____________ CFM Zone 7 _____________CFM

Zone 4 ____________ CFM Zone 8 _____________CFM

Step 4: Equipment Selection

Indoor Section ____________ Outdoor Section _____________

Heating Capacity/CFM ____________ _____________

Cooling Capacity/CFM ____________ _____________

Design CFM ____________

Step 5: Bypass Determination

System Design CFM * ____________ X 0.60 = ______________

* Design CFM can be: Step 1C from above OR if Two Speed/Variable Speed equipment is selected, select low speed CFM value.

Step 6: Zone Minimum Area (sq. in.)(from Table 1, page 21)

CFM Main Duct (sq. in.) Branch Area (sq. in.)

Zone 1 ____________ ____________ ____________

Zone 2 ____________ ____________ ____________

Zone 3 ____________ ____________ ____________

Zone 4 ____________ ____________ ____________

Zone 5 ____________ ____________ ____________

Zone 6 ____________ ____________ ____________

Zone 7 ____________ ____________ ____________

Zone 8 ____________ ____________ ____________

—9—

Bryant ZONE PERFECT PLUS User Manual

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