Watts Aerco INN 1060N - Innovation 600 N Combustion Air Duct Pressure Drop Tables

Innovation Water Heaters – Edge [i] Controller
Venting and Combustion Air Design Guide
TAG-0090_A • GF-5056 • 2/20/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 28 of 39
3.7.2 Innovation 600N Combustion Air Duct Pressure Drop Tables
• Values for Straight Run are equivalent feet per foot or meters per meter
• Values for 90° Elbow, 45° Elbow, and Ent. Loss are equivalent feet (equivalent
millimeters)
TABLE 5: Innovation 600N MBTU (176 kW) Water Heaters
Inlet Duct
& No.
Units
Duct
Section
Type
Outside Air Temperature
-30 °F
-15 °F
0 °F
20 °F
40 °F
60 °F
80 °F
100 °F
120 °F
-34 °C
-26 °C
-18 °C
-7 °C
4 °C
16 °C
27 °C
38 °C
49 °C
6" Duct
Single Unit
Straight Run
0.19
0.2
0.2
0.21
0.21
0.22
0.23
0.24
0.24
90° Elbow
0.82
0.86
0.9
0.96
1.02
1.09
1.16
1.24
1.32
(250)
(262)
(274)
(293)
(311)
(332)
(354)
(378)
(402)
45° Elbow
0.60
0.63
0.67
0.71
0.76
0.81
0.86
0.92
0.98
(183)
(192)
(204)
(216)
(232)
(247)
(262)
(280)
(299)
Ent. Loss
1.27
1.33
1.4
1.49
1.59
1.7
1.81
1.94
2.06
(387)
(405)
(427)
(454)
(485)
(518)
(552)
(591)
(628)
8" Duct
Single Unit
Straight Run
0.05
0.05
0.05
0.05
0.05
0.05
0.06
0.06
0.06
90° Elbow
0.21
0.22
0.23
0.24
0.26
0.28
0.30
0.32
0.34
(64)
(67)
(70)
(73)
(79)
(85)
(91)
(98)
(104)
45° Elbow
0.16
0.16
0.17
0.18
0.2
0.21
0.22
0.24
0.25
(49)
(49)
(52)
(55)
(61)
(64)
(67)
(73)
(76)
Ent. Loss
0.40
0.42
0.44
0.47
0.5
0.54
0.57
0.61
0.65
(122)
(128)
(134)
(143)
(152)
(165)
(174)
(186)
(198)
8" Duct
Two Units
Straight Run
0.14
0.15
0.16
0.17
0.18
0.19
0.20
0.22
0.23
90° Elbow
0.83
0.87
0.92
0.98
1.04
1.11
1.19
1.27
1.35
(253)
(265)
(280)
(299)
(317)
(338)
(363)
(387)
(411)
45° Elbow
0.63
0.66
0.69
0.74
0.79
0.84
0.90
0.96
1.02
(192)
(201)
(210)
(226)
(241)
(256)
(274)
(293)
(311)
Ent. Loss
1.61
1.69
1.77
1.89
2.02
2.15
2.30
2.45
2.61
(491)
(515)
(539)
(576)
(616)
(655)
(701)
(747)
(796)
10" Duct
Two Units
Straight Run
0.05
0.05
0.05
0.06
0.06
0.06
0.07
0.07
0.08
90° Elbow
0.30
0.31
0.33
0.35
0.37
0.40
0.42
0.45
0.48
(91)
(94)
(101)
(107)
(113)
(122)
(128)
(137)
(146)
45° Elbow
0.23
0.24
0.25
0.27
0.28
0.3
0.32
0.35
0.37
(70)
(73)
(76)
(82)
(85)
(91)
(98)
(107)
(113)
Ent. Loss
0.66
0.69
0.73
0.77
0.83
0.88
0.94
1.00
1.07
(201)
(210)
(223)
(235)
(253)
(268)
(287)
(305)
(326)
TABLE 5: Innovation 600N MBTU (176 kW) Water Heaters – Continued
Outside Air Temperature
-30 °F
-15 °F
0 °F
20 °F
40 °F
60 °F
80 °F
100 °F
120 °F