Bryant ZONE PERFECT PLUS - Page 12

DUCT SIZING WORKSHEET-EXAMPLE 1
Step 1:Calculate Block Load
Heating Load:______________125,000 Btuh Cooling Load:_____________115,000 Btuh
Step 2:Room by Room Load
Room Heating Load (Btuh) Cooling Load (Btuh) Airflow (CFM )* Zone Number
Waiting Room ___________ ____________ ____1,000___ _______6_____
Room 1_____ ___________ ____________ _____250____ _______1_____
Room 2_____ ___________ ____________ _____250____ _______1_____
Room 3_____ ___________ ____________ _____250____ _______2_____
Room 4_____ ___________ ____________ _____250____ _______2_____
Back Bathroom ___________ ____________ _____150____ _______4_____
Lab________ ___________ ____________ _____550____ _______4_____
Office_______ ___________ ____________ _____600____ _______3_____
Office/Restrooms ___________ ____________ _____700____ _______5_____
____________ ___________ ____________ ____________ _____________
____________ ___________ ____________ ____________ _____________
____________ ___________ ____________ ____________ _____________
____________ ___________ ____________ ____________ _____________
____________ ___________ ____________ ____________ _____________
____________ ___________ ____________ ____________ _____________
____________ ___________ ____________ ____________ _____________
*Highest CFM determined from Heat/Cool Btuh
Step 3: Zone CFM totals
Zone 1 _________500 CFM Zone 5 __________700 CFM
Zone 2 _________500 CFM Zone 6 ________1,000 CFM
Zone 3 _________600 CFM Zone 7 _____________ CFM
Zone 4 _________700 CFM Zone 8 _____________ CFM
Step 4: Equipment Selection
Indoor Section ____________ Outdoor Section ______581B120
Heating Capacity/CFM ______125,000 _________4,000
Cooling Capacity/CFM ______115,000 _________4,000
Design CFM ________4,000
Step 5: Bypass Determination
System Design CFM * 4,000________ X 0.60 = 2,400_________
(Value MUST be less than smallest zone CFM; otherwise Bypass Damper may be required)
* Design CFM can be: Step 1C from above OR if Two Speed/Variable Speed equipment is selected, select low speed CFM value.
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