Specifications
41
With the introduction of ducted indoor unit products, some information on duct selection and design seems appropriate. Considering the
performance and design of these indoor units, selection and proper duct sizing and installation will be necessary for satisfactory operation.
The maximum available static pressure from the PEA indoor unit is 0.2 in. W.G. and for the PEADs 0.6 in. W.G.. With this in mind, the
ductwork design must be taken into consideration to ensure proper airflow to the space is achieved. The emphasis should still be on moving
refrigerant and not air; not only will this help to work within the static pressure available but it is also more efficient. Here are some good
practices when ducting the low profile unit:
• When reviewing static pressure duct loss in a system, the longest duct run from the unit is the maximum static pressure the unit will see.
• Flexible ductwork, while making installations simpler, can add unnecessary static pressure loss if not utilized properly. Most of the static
pressure duct loss comes from allowing the duct work to sag. Allowing even a 30 percent sag in the ductwork can increase the static
pressure loss up to eight times. Flexible ductwork runs should be kept to less than 15 ft. Elbows should be kept to a minimum and
made as wide as possible.
• Grilles should be selected so that the air velocity is less than 500 ft. per minute, this will help to minimize static pressure loss. The chart
below shows grille sizes and corresponding flow rates to keep the static pressure loss under 0.05 in.:
• The final component is to understand what the static pressure loss
is in the ductwork. The chart below shows approximate static
pressure loss per 100 ft. for various round duct sizes and flow
rates. If flexible ductwork is being used and the flex remains
stretched, 20 percent can be added to the values below to
approximate the loss.
4"ø 6"ø 8"ø 10"ø
50 CFM 0.15 0.02 - -
100 CFM 0.6 0.08 0.02 -
150 CFM - 0.2 0.04 -
200 CFM - 0.3 0.08 0.02
250 CFM - 0.45 0.11 0.04
500 CFM - - 0.4 0.15
Air Flow (CFM) 50 100 150 200 250
Grille Size (In. x In.) 6x6 6x6 8x6 10x6, 8x8 12x6, 10x8
9
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
80
[0.321]
100
[0.401]
90
[0.361]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
PEAD-A36AA
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 0.20 [in W.G.] (50Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 0.40 [in W.G.] (100Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 0.60 [in W.G.] (150Pa) 208-230V 60Hz
10
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m
3/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m3/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m
3
/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
250
[1.004]
Airflow rate (m
3/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
80
[0.321]
100
[0.401]
90
[0.361]
Airflow rate (m
3
/min)[cfm]
Airflow rate (m
3
/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
External static pressure (Pa)[in.WG]
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
PEAD-A42AA
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 0.20 [in W.G.] (50Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 0.40 [in W.G.] (100Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 0.60 [in W.G.] (150Pa) 208-230V 60Hz
9
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
80
[0.321]
100
[0.401]
90
[0.361]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
PEAD-A36AA
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 0.20 [in W.G.] (50Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 0.40 [in W.G.] (100Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 0.60 [in W.G.] (150Pa) 208-230V 60Hz
10
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m
3
/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m3/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m
3
/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
250
[1.004]
Airflow rate (m
3/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
80
[0.321]
100
[0.401]
90
[0.361]
Airflow rate (m
3
/min)[cfm]
Airflow rate (m
3
/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
External static pressure (Pa)[in.WG]
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
PEAD-A42AA
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 0.20 [in W.G.] (50Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 0.40 [in W.G.] (100Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 0.60 [in W.G.] (150Pa) 208-230V 60Hz
9
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
10
[353]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
80
[0.321]
100
[0.401]
90
[0.361]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
PEAD-A36AA
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 0.20 [in W.G.] (50Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 0.40 [in W.G.] (100Pa) 208-230V 60Hz
PEAD-A36AA
(External static pressure 0.60 [in W.G.] (150Pa) 208-230V 60Hz
10
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m
3
/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m3/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
Airflow rate (m
3
/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
250
[1.004]
Airflow rate (m
3/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
50
[0.201]
100
[0.401]
150
[0.602]
200
[0.803]
Airflow rate (m
3
/min)[cfm]
External static pressure (Pa)[in.WG]
0
[0]
10
[0.040]
20
[0.080]
30
[0.120]
40
[0.161]
50
[0.201]
60
[0.241]
70
[0.281]
80
[0.321]
100
[0.401]
90
[0.361]
Airflow rate (m
3
/min)[cfm]
Airflow rate (m
3
/min)[cfm]
15
[530]
20
[706]
25
[883]
30
[1059]
35
[1236]
40
[1412]
45
[1589]
External static pressure (Pa)[in.WG]
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
Limit
Low
Middle
High
Rated point
PEAD-A42AA
(External static pressure 35Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 0.20 [in W.G.] (50Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 70Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 0.40 [in W.G.] (100Pa) 208-230V 60Hz
PEAD-A42AA
(External static pressure 0.60 [in W.G.] (150Pa) 208-230V 60Hz