Canadian HVAC Duct Sizing Calculator

System Parameters

Climate Zone

Building Type

Furnace/AHU Input (BTU/h)

Fan Capacity (CFM)

Duct Material

System Type

Total Equivalent Length (ft)

Number of Fittings

Room Information

Room Name

Area (sq ft)

Ceiling Height (ft)

Registers

Calculation Results

System Summary

Total Heating Load: - BTU/h

Total Airflow Required: - CFM

Static Pressure Loss: - in. w.c.

Cold Air Return Area: - sq in

Main Trunk

- inches

Velocity: - ft/min

Sub-Trunk

- inches

Velocity: - ft/min

Branch Ducts

- inches

Round: -