1 stage vs 2 stage vs variable speed

38:09

52:58

3:53

4:25

35:11

41:24

52:14

1:16:55

42:39

1:00:57

43:22

31:19

46:15

33:50

52:38

54:38

51:18

52:57

47:02

45:01

45:37

39:35

50:57

44:27

1:13:05

41:37

51:57

46:36

46:38

44:57

55:48

44:20

6:23

55:17

40:09

55:02

44:37

44:47

41:08

24:34