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Duct Leakage Calculator

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Input Parameters

Unit System

Results

Duct Leakage Analysis

0
Leakage Rate CFM
0
Leakage Percentage %
0
Annual Energy Loss kWh/year
0
Annual Cost $/year

Cost Breakdown

Annual Energy Loss0.0678 kWh/year(100%)
Annual Cost0.00814 $/year(1%)
Leakage Rate0.0493 CFM(0%)

Leakage Analysis

Calculation Steps

1

Calculate Duct Surface Area

Formula:
A=πDLA = \pi D L
Calculation:
A=π×1.000×100.0A = \pi \times 1.000 \times 100.0
Result:
314.2 \text{ ft^2}
2

Calculate Leakage Rate at Test Pressure

Formula:
Qleak=CLAP0.65Q_{leak} = C_L A P^{0.65}
Calculation:
Qleak=0.0001×314.2×1.000.65Q_{leak} = 0.0001 \times 314.2 \times 1.00^{0.65}
Result:
0.03 CFM0.03 \text{ CFM}
3

Calculate Operating Leakage Rate

Formula:
Qop=Qtest(PopPtest)0.65Q_{op} = Q_{test} \left(\frac{P_{op}}{P_{test}}\right)^{0.65}
Calculation:
Qop=0.03(21.00)0.65Q_{op} = 0.03 \left(\frac{2}{1.00}\right)^{0.65}
Result:
0.05 CFM0.05 \text{ CFM}
4

Calculate Annual Energy Loss

Formula:
E=Ploss×8760E = P_{loss} \times 8760
Calculation:
E=0.000×8760E = 0.000 \times 8760
Result:
0 kWh/year0 \text{ kWh/year}