DR stands for Depression Ratio and is a measurement used in air conditioning systems to determine the ratio of the difference between the entering wet bulb temperature and the leaving wet bulb temperature to the entering dry bulb temperature.

How do I adjust the sensible capacity for different entering air temperatures?

To adjust the sensible capacity for different entering air temperatures, use the formula: Sensible capacity = Original sensible capacity + (1.10 x CFM x 1DR x difference from 80F 27C)

What is the difference between total capacity and sensible capacity?

Total capacity refers to the overall cooling capacity of the air conditioning system, while sensible capacity specifically refers to the system's ability to remove sensible heat.

GROSS SYSTEMS PERFORMANCE DATA-RSNA-B048

SYSTEMS PERFORMANCE—RSNA-B SERIES

GROSS SYSTEMS PERFORMANCE DATA—RSNA-B048

ENTERING INDOOR AIR @ 80°F [26.7°C] dbE ➀

wbE		71°F [21.7°C]			67°F [19.4°C]			63°F [17.2°C]
CFM [L/s]	1760 [831]	1600 [755]	1360 [642]	1760 [831]	1600 [755]	1360 [642]	1760 [831]	1600 [755]	1360 [642]
DR ➀	.20	.19	.17	.20	.19	.17	.20	.19	.17

Total BTUH [kW]

60.8 [17.82]

59.7 [17.50]

58.1 [17.03]

56.4 [16.53]

55.4 [16.24]

53.9 [15.80]

53.1 [15.56]

52.2 [15.30]

50.8 [14.89]

Sens BTUH [kW]

36.3 [10.64]

34.7 [10.17]

32.3

[9.47]

41.5 [12.16]

39.7 [11.63]

36.9 [10.81]

48.2 [14.13]

46.0 [13.48]

42.8 [12.54]

[23.9]

Power

2.9

2.8

Total BTUH [kW]

59.9 [17.55]

58.8 [17.23]

57.2 [16.76]

55.5 [16.27]

54.5 [15.97]

53.0 [15.53]

52.3 [15.33]

51.3 [15.03]

49.9 [14.62]

Sens BTUH [kW]

35.2 [10.32]

33.7

[9.88]

31.3

[9.17]

40.4 [11.84]

38.6 [11.31]

35.9 [10.52]

47.1 [13.80]

45.0 [13.19]

41.8 [12.25]

[26.7]

Power

3.1

3.0

3.1

3.0

Total BTUH [kW]

58.8 [17.23]

57.7 [16.91]

56.1 [16.44]

54.4 [15.94]

53.4 [15.65]

51.9 [15.21]

51.1 [14.98]

50.2 [14.71]

48.8 [14.30]

Sens BTUH [kW]

34.3 [10.05]

32.8

[9.61]

30.5

[8.94]

39.5 [11.58]

37.7 [11.05]

35.1 [10.29]

46.1 [13.51]

44.1 [12.92]

41.0 [12.02]

[29.4]

Power

3.3

3.2

3.3

3.2

3.1

Total BTUH [kW]

57.4 [16.82]

56.4 [16.53]

54.8 [16.06]

53.0 [15.53]

52.0 [15.24]

50.6 [14.83]

49.7 [14.57]

48.8 [14.30]

47.5 [13.92]

Sens BTUH [kW]

33.5

[9.82]

32.0

[9.38]

29.8

[8.73]

38.7 [11.34]

37.0 [10.84]

34.4 [10.08]

45.3 [13.28]

43.4 [12.72]

40.3 [11.81]

[32.2]

Power

3.4

3.3

Total BTUH [kW]

55.9 [16.38]

54.9 [16.09]

53.4 [15.65]

51.5 [15.09]

50.6 [14.83]

49.2 [14.42]

48.2 [14.13]

47.4 [13.89]

46.1 [13.51]

Sens BTUH [kW]

33.1

[9.70]

31.6

[9.26]

29.4

[8.62]

38.3 [11.22]

36.6 [10.73]

34.0

[9.96]

45.0 [13.19]

42.9 [12.57]

39.9 [11.69]

[35]

Power

3.6

3.5

3.6

3.5

100

Total BTUH [kW]

54.3 [15.91]

53.3 [15.62]

51.9 [15.21]

49.9 [14.62]

49.0 [14.36]

47.7 [13.98]

46.7 [13.69]

45.8 [13.42]

44.6 [13.07]

Sens BTUH [kW]

33.0

[9.67]

31.5

[9.23]

29.3

[8.59]

38.2 [11.20]

36.5 [10.70]

34.0

[9.96]

45.0 [13.19]

42.9 [12.57]

39.9 [11.69]

[37.8]

Power

3.8

3.7

3.8

3.7

3.6

105

Total BTUH [kW]

52.8 [15.47]

51.8 [15.18]

50.4 [14.77]

48.4 [14.18]

47.5 [13.92]

46.2 [13.54]

45.1 [13.22]

44.3 [12.98]

43.1 [12.63]

Sens BTUH [kW]

33.4

[9.79]

31.9

[9.35]

29.7

[8.70]

38.6 [11.31]

36.9 [10.81]

34.3 [10.05]

45.1 [13.22]

43.2 [12.66]

40.2 [11.78]

[40.6]

Power

3.9

3.8

Total BTUH [kW]

51.3 [15.03]

50.4 [14.77]

49.0 [14.36]

46.9 [13.75]

46.1 [13.51]

44.8 [13.13]

43.6 [12.78]

42.9 [12.57]

41.7 [12.22]

110

Sens BTUH [kW]

34.4 [10.08]

32.9

[9.64]

30.6

[8.97]

39.6 [11.61]

37.8 [11.08]

35.2 [10.32]

43.6 [12.78]

42.9 [12.57]

41.1 [12.05]

°F

[43.3]

Power

4.1

4.0

4.1

4.0

4.1

4.0

[°C]

115

Total BTUH [kW]

50.0 [14.65]

49.1 [14.39]

47.8 [14.01]

45.6 [13.36]

44.8 [13.13]

43.6 [12.78]

42.3 [12.40]

41.6 [12.19]

40.4 [11.84]

Sens BTUH [kW]

36.0 [10.55]

34.4 [10.08]

32.0

[9.38]

41.2 [12.07]

39.4 [11.55]

36.6 [10.73]

42.3 [12.40]

41.6 [12.19]

40.4 [11.84]

[46.1]

Power

4.3

4.2

4.3

4.2

4.1

GROSS SYSTEMS PERFORMANCE DATA—RSNA-B060

ENTERING INDOOR AIR @ 80°F [26.7°C] dbE ➀

wbE		71°F [21.7°C]			67°F [19.4°C]			63°F [17.2°C]
CFM [L/s]	2040 [963]	1850 [873]	1570 [741]	2040 [963]	1850 [873]	1570 [741]	2040 [963]	1850 [873]	1570 [741]
DR ➀	.21	.20	.18	.21	.20	.18	.21	.20	.18

Total BTUH [kW]

69.9 [20.49]

68.7 [20.13]

66.8 [19.58]

66.3 [19.43]

65.1 [19.08]

63.3 [18.55]

63.8 [18.70]

62.6 [18.35]

60.9 [17.85]

Sens BTUH [kW]

41.5 [12.16]

39.7 [11.63]

36.9 [10.81]

48.8 [14.30]

46.7 [13.69]

43.4 [12.72]

53.0 [15.53]

50.6 [14.83]

47.1 [13.80]

[23.9]

Power

3.9

3.8

3.7

Total BTUH [kW]

69.6 [20.40]

68.4 [20.05]

66.5 [19.49]

65.9 [19.31]

64.8 [18.99]

63.0 [18.46]

63.4 [18.58]

62.3 [18.26]

60.6 [17.76]

Sens BTUH [kW]

40.4 [11.84]

38.6 [11.31]

35.9 [10.52]

47.8 [14.01]

45.6 [13.36]

42.4 [12.43]

51.9 [15.21]

49.6 [14.54]

46.1 [13.51]

[26.7]

Power

4.1

4.0

3.9

Total BTUH [kW]

68.5 [20.08]

67.3 [19.72]

65.4 [19.17]

64.8 [18.99]

63.7 [18.67]

61.9 [18.14]

62.3 [18.26]

61.2 [17.94]

59.5 [17.44]

Sens BTUH [kW]

39.4 [11.55]

37.6 [11.02]

35.0 [10.26]

46.7 [13.69]

44.6 [13.07]

41.5 [12.16]

50.9 [14.92]

48.6 [14.24]

45.2 [13.25]

[29.4]

Power

4.3

4.2

4.1

4.2

4.1

Total BTUH [kW]

66.8 [19.58]

65.6 [19.23]

63.9 [18.73]

63.2 [18.52]

62.0 [18.17]

60.4 [17.70]

60.7 [17.79]

59.6 [17.47]

58.0 [17.00]

Sens BTUH [kW]

38.3 [11.22]

36.6 [10.73]

34.0

[9.96]

45.7 [13.39]

43.6 [12.78]

40.6 [11.90]

49.8 [14.59]

47.6 [13.95]

44.3 [12.98]

[32.2]

Power

4.5

4.4

4.3

4.4

4.3

Total BTUH [kW]

64.8 [18.99]

63.7 [18.67]

61.9 [18.14]

61.2 [17.94]

60.1 [17.61]

58.4 [17.12]

58.7 [17.20]

57.6 [16.88]

56.0 [16.41]

Sens BTUH [kW]

37.3 [10.93]

35.6 [10.43]

33.1

[9.70]

44.6 [13.07]

42.6 [12.48]

39.7 [11.63]

48.8 [14.30]

46.6 [13.66]

43.4 [12.72]

[35]

Power

4.7

4.6

4.5

4.6

4.5

Total BTUH [kW]

62.7 [18.38]

61.6 [18.05]

59.9 [17.55]

59.0 [17.29]

58.0 [17.00]

56.4 [16.53]

56.5 [16.56]

55.5 [16.27]

54.0 [15.83]

100

Sens BTUH [kW]

36.3 [10.64]

34.7 [10.17]

32.3

[9.47]

43.6 [12.78]

41.7 [12.22]

38.8 [11.37]

47.8 [14.01]

45.7 [13.39]

42.5 [12.46]

[37.8]

Power

4.9

4.8

4.7

4.8

4.7

105

Total BTUH [kW]

60.6 [17.76]

59.6 [17.47]

57.9 [16.97]

57.0 [16.71]

55.9 [16.38]

54.4 [15.94]

54.5 [15.97]

53.5 [15.68]

52.0 [15.24]

Sens BTUH [kW]

35.3 [10.35]

33.8

[9.91]

31.4

[9.20]

42.7 [12.51]

40.8 [11.96]

37.9 [11.11]

46.9 [13.75]

44.8 [13.13]

41.6 [12.19]

[40.6]

Power

5.1

5.0

5.1

5.0

4.9

5.0

4.9

Total BTUH [kW]

58.8 [17.23]

57.8 [16.94]

56.2 [16.47]

55.2 [16.18]

54.2 [15.88]

52.7 [15.44]

51.7 [15.15]

50.3 [14.74]

110

Sens BTUH [kW]

34.4 [10.08]

32.9

[9.64]

30.6

[8.97]

41.8 [12.25]

39.9 [11.69]

37.1 [10.87]

45.9 [13.45]

43.9 [12.87]

40.8 [11.96]

°F

[43.3]

Power

5.3

5.2

5.3

5.2

5.1

[°C]

115

Total BTUH [kW]

57.5 [16.85]

56.5 [16.56]

55.0 [16.12]

53.9 [15.80]

52.9 [15.50]

51.4 [15.06]

51.3 [15.03]

50.4 [14.77]

49.0 [14.36]

Sens BTUH [kW]

33.5 [9.82]

32.0

[9.38]

29.8

[8.73]

40.9 [11.99]

39.1 [11.46]

36.3 [10.64]

45.0 [13.19]

43.0 [12.60]

40.0 [11.72]

[46.1]

Power

5.6

5.5

5.4

5.5

5.4

5.3

DR —Depression ratio dbE —Entering air dry bulb wbE—Entering air wet bulb

Total —Total capacity x 1000 BTUH Sens —Sensible capacity x 1000 BTUH Power—KW input

NOTES: ➀ When the entering air dry bulb is other than 80°F [27°C], adjust the sensible capacity from the table by adding [1.10 x CFM x (1 – DR) x (dbE – 80)].

[ ] Designates Metric Conversions

Rheem RSNA-B Series GROSS SYSTEMS PERFORMANCE DATA-RSNA-B048, Systems Performance-Rsna-Bseries

Models: RSNA-B Series

GROSS SYSTEMS PERFORMANCE DATA—RSNA-B048

GROSS SYSTEMS PERFORMANCE DATA—RSNA-B060

FAQ

What does DR mean?

How do I adjust the sensible capacity for different entering air temperatures?

What is the difference between total capacity and sensible capacity?