Air Duct Insulation Thickness Calculation

Ductwork support ductwork support and recommended.

Air duct insulation thickness calculation.

Enter the ambient temperature the average temperature of the air surrounding the duct line 3. Air and is a useful tool in air conditioning calculations. Thermal insulation and ductwork heat loss calculation. Heat conduction and thermal resistance.

Enter the length of the duct run in feet. This chart can be. Duct wrap insulation reduces heat loss or gain through duct walls conserving energy. How often do you think you get the full labeled r value.

Enter the perimeter of the duct in inches. Duct velocity calculate velocities in circular and rectangular ducts imperial and si units online calculator. The tee section at the far end of the main duct causes the air to suddenly divide and change direction. There is a high amount of backflow here which again increases the static pressure and reduces the amount of air delivery.

Fibrous glass duct wrap insulation is designed for application to the exteriors of commercial and residential sheet metal heating ventilating and air conditioning ducts and plenums operating at temperatures between 40 f 4 c and 250 f 121 c. General formula to calculate minimum insulation thickness required to prevent condensation t k r t1 t2 t3 t1 where t insulation thickness in k thermal conductivity r surface temperature resistance t1 dew point temperature. Local resistance pressure loss general calculation. Mass air flow rate unit converter.

Some other factors to consider. A diffusion tight application is a must minimum insulation thickness 7 6 mm tube diameter 25 4 mm. Air handling ductwork cross section design. Ductwork seal classes ductwork prone to air leakages.

Enter the flow rate of the air carried by the duct in cubic feet per minute. Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. Enter the r value of the selected duct insulation. Note that the r in equation 2 is the factor often found on blanket insulation.

Air state calculation during heating and heater output. R 6 duct insulation 6 305 btu hour 0 53 ton r 4 2 duct insulation 7 948 btu hour 0 66 ton the numbers are even higher for the additional heating load. Hvac calculations and duct sizing gary d. Ductwork specific pressure loss calculation.