Air Duct Insulation Thickness Calculation

Thermal insulation and ductwork heat loss calculation.

Air duct insulation thickness calculation.

Note that the r in equation 2 is the factor often found on blanket insulation. The duct insulation r values i mentioned above are what s on the product label. 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. Duct wrap insulation reduces heat loss or gain through duct walls conserving energy.

Air handling ductwork cross section design. Air and is a useful tool in air conditioning calculations. Ductwork support ductwork support and recommended. Heat conduction and thermal resistance.

Duct velocity calculate velocities in circular and rectangular ducts imperial and si units online calculator. 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. Local resistance pressure loss general calculation. Enter the length of the duct run in feet.

Mass air flow rate unit converter. 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. Air state calculation during heating and heater output.

The sharp turns cause a large amount of recirculation regions within the ducts preventing the air from moving smoothly. This chart can be. The tee section at the far end of the main duct causes the air to suddenly divide and change direction. Enter the flow rate of the air carried by the duct in cubic feet per minute.

Enter the r value of the selected duct insulation. Enter the ambient temperature the average temperature of the air surrounding the duct line 3. Enter the perimeter of the duct in inches. Ductwork specific pressure loss 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. Some other factors to consider. Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. There is a high amount of backflow here which again increases the static pressure and reduces the amount of air delivery.