Length of

Size of Copper Tube (O.D.)

Copper Tube

1/4"

5/16"

Kw/h

Cu/Ft

Kw/h

Cu/Ft

Feet

Propane

Butane

Propane

Butane

10

4.03

5.16

5.5

10.26

13.13

14.0

20

2.86

3.66

3.9

5.13

6.57

7.0

30

2.34

3.00

3.2

3.44

4.41

4.7

40

1.98

2.53

2.7

2.64

3.38

3.6

50

1.76

2.25

2.4

2.05

2.63

2.8

60

1.54

1.97

2.1

1.69

1.39

1.9

Length of

Size of Copper Tube (O.D.)

Copper Tube

3/8"

1/2"

Kw/h

Cu/Ft

Kw/h

Cu/Ft

Feet

Propane

Butane

Propane

Butane

10

19.70

15.39

21

45.43

58.15

62

20

10.26

13.13

14

30.77

39.39

42

30

8.43

10.79

11.5

24.18

30.95

33

40

7.33

9.38

10

21.25

27.20

29

50

6.59

8.44

9

18.32

23.45

25

60

6.08

7.78

8.3

16.12

20.63

22