Air Duct Insulation Thickness Calculation

Air state calculation during heating and heater output.

Air duct insulation thickness calculation.

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. Heat conduction and thermal resistance. 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. Enter the perimeter of the duct in inches.

There is a high amount of backflow here which again increases the static pressure and reduces the amount of air delivery. Mass air flow rate unit converter. Ductwork specific pressure loss calculation. Duct velocity calculate velocities in circular and rectangular ducts imperial and si units online calculator.

Enter the r value of the selected duct insulation. Some other factors to consider. Ductwork support ductwork support and recommended. How often do you think you get the full labeled r value.

Hvac calculations and duct sizing gary d. The tee section at the far end of the main duct causes the air to suddenly divide and change direction. Air and is a useful tool in air conditioning calculations. 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.

Enter the flow rate of the air carried by the duct in cubic feet per minute. Duct wrap insulation reduces heat loss or gain through duct walls conserving energy. Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. The sharp turns cause a large amount of recirculation regions within the ducts preventing the air from moving smoothly.

Enter the ambient temperature the average temperature of the air surrounding the duct line 3. This chart can be. Thermal insulation and ductwork heat loss calculation. 3 2sufficient thermal insulation thickness tm 6 c φ 65 td 22 8 c ta 30 c r flex st kalınlık 9 mm ts 23 6 c td 22 8 c thermal insulation material with a high µ value no condensation.

Enter the length of the duct run in feet. Local resistance pressure loss general calculation. Ductwork seal classes ductwork prone to air leakages. A diffusion tight application is a must minimum insulation thickness 7 6 mm tube diameter 25 4 mm.