Carrier 120 Series - Maximum Equivalent Vent Length; Deductions from Maximum Equivalent Vent Length

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NOTE: Maximum Equivalent Vent Length (MEVL) includes standard and concentric vent termination and does NOT include elbows.
Use Table 16 - Deductions from Maximum Equivalent Vent Length to determine allowable vent length for each application.
Table 15 – Maximum Equivalent Vent Length -- Ft. (M)
0 to 4500 Ft. (0 to 1370 M) Altitude
Altitude
FT (M)
Unit Size
BTU/Hr
DIRECT VENT (2-PIPE) AND VENTILATED COMBUSTION AIR ONLY
Vent Pipe Diameter (in.)
1-1/2 2 2-1/2 3 4
0 to 2000
(0 to 610)
60,000 55 (16.8) 135 (41.1) 235 (71.6) 265 (80.8) NA
80,000 35 (10.7) 130 (39.6) 175 (53.3) 235 (71.6) 265 (80.8)
100,000 NA 50 (15.2) 110 (33.5) 235 (71.6) 265 (80.8)
120,000 NA NA 15 (4.6) 100 (30.5) 250 (76.2)
2001 to 3000
(610 to 914)
60,000 45 (13.7) 127 (38.7) 222 (67.7) 250 (76.2) NA
80,000 30 (9.1) 90 (27.4) 165 (50.3) 222 (67.7) 249 (75.9)
100,000 NA 40 (12.2) 104 (31.7) 223 (68.0) 250 (76.2)
120,000 NA NA 11 (3.4) 93 (28.3) 237 (72.2)
3001 to 4000
(914 to 1219)
60,000 40 (12.2) 119 (36.3) 210 (64.0) 235 (71.6) NA
80,000 25 (7.6) 85 (25.9) 155 (47.2) 210 (64.0) 232 (70.7)
100,000 NA 40 (12.2) 98 (29.9) 211 (64.3) 236 (71.9)
120,000 NA NA 8 (2.4) 86 (26.2) 224 (68.3)
4001 to 4500
(1219 to 1370)
60,000 35 (10.7) 115 (35.1) 204 (62.2) 228 (69.5) NA
80,000 23 (7.0) 85 (25.9) 150 (45.7) 202 (61.6) 224 (68.3)
100,000 NA 40 (12.2) 94 (28.7) 205 (62.5) 229 (69.8)
120,000 NA NA NA 83 (25.3) 217 (66.1)
* See notes at end of venting tables.
*See Ta ble 17 for al titudes over 4500 ft. (1370 M)
Long
Medium
Mitered
Concentric
Standard 2-in., 3-in., or
optional 4-in. termination.
ELBOW CONFIGURATIONS
VENT TERMINAL CONFIGURATIONS
A13110
Table 16 – Deductions from Maximum Equivalent Vent Length -- Ft. (M)
Pipe Diameter (in): 1-1/2 2 2-1/2 3 4
Mitered 90º Elbow 8 (2.4) 8 (2.4) 8 (2.4) 8 (2.4) 8 (2.4)
Medium Radius 90º Elbow 5 (1.5) 5 (1.5) 5 (1.5) 5 (1.5) 5 (1.5)
Long Radius 90º Elbow 3 (0.9) 3 (0.9) 3 (0.9) 3 (0.9) 3 (0.9)
Mitered 45º Elbow 4 (1.2) 4 (1.2) 4 (1.2) 4 (1.2) 4 (1.2)
Medium Radius 45º Elbow 2.5 (0.8) 2.5 (0.8) 2.5 (0.8) 2.5 (0.8) 2.5 (0.8)
Long Radius 45º Elbow 1.5 (0.5) 1.5 (0.5) 1.5 (0.5) 1.5 (0.5) 1.5 (0.5)
Tee 16 (4.9) 16 (4.9) 16 (4.9) 16 (4.9) 16 (4.9)
Concentric Vent Termination NA 0 (0.0) NA 0 (0.0) NA
Standard Vent Termination 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0) 0 (0.0)
59MN7A