DA
HVAC Pro-Ductulator
Trane Metal Logic • Load Calc • Trunk Sizer
1. Load & Server Calc
2. Duct Sizing & Reducer
3. Quick Calc
Residential / Commercial Load
Calc Cooling
Rule: 400 CFM per Ton (12k BTU)
Calc Heating
Rule: 150 CFM per 10k BTU (Gas Furnace)
Server Room / IT Load
Calc IT Load
Rule: Watts x 3.41 = BTU. Then 400 CFM/Ton.
RECOMMENDED AIRFLOW
0 CFM
Use this for Duct Sizing →
System Requirements
Total System CFM
Friction Rate (in.wg / 100')
Residential Standard (0.1)
Commercial Supply (0.08)
Commercial Return (0.06)
HRV / ERV (0.3)
Registers & Balance
Total Registers in System
Avg: 40 CFM / reg
Ideal: 40-60 CFM. (As low as 35 CFM may work)
📉 Trunk Line Reducer
-- CFM
Duct Height
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Strict Height
Allow Wider then Main Duct
Low Profile (Bias Flat)
Registers REMAINING on this run:
Red. Rect
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Red. Round
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Alternative (Match W)
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Main Plenum / Start Size
Rectangular (Auto)
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Round Pipe
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Design Specs
Total Volume:
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Friction Rate:
--
Velocity:
-- fpm
Quick Calculator
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Notes
Use mouse or keyboard.
Esc = Clear
Enter = Equals
Select Rectangular Size
Click a size to set it
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