Duct Wrap Insulation

Overview

Engineering reference data for Duct Wrap Insulation in HVAC systems.

Key Formulas

Sensible Heat

$Q = \dot{m} c_p \Delta T$

Heat causing temperature change.

Latent Heat

$Q = \dot{m} h_{fg} \Delta\omega$

Heat causing moisture change.

COP (Cooling)

$COP = Q_c / W$

Coefficient of performance.

Variables

Symbol	Description	Unit
$Q$	Heat transfer	W
$\dot{m}$	Mass flow rate	kg/s
$c_p$	Specific heat of air	J/(kg·K)
$\Delta T$	Temperature difference	K

Faced vs. Unfaced Insulation

Faced insulation includes a vapor retarder (paper or plastic facing) to help prevent moisture issues like mold and mildew. It is generally recommended for use in exterior walls and attic ceilings. Unfaced insulation lacks this vapor retarder. Always consult local building codes for specific vapor retarder requirements in your application.

Unit Conversion: Note that 1 h·ft²·°F/Btu = 0.18 m²·°C/W.

Interactive Charts

References

• Original Source