Table 2: Minimum room area
System charge (lb-oz) Minimum room area
(ft
2
)
Minimum total
conditioned area (ft
2
)
Minimum system
airflow (CFM)
9-12 105 141 568
10-0 107 145 583
10-4 110 148 597
10-8 113 152 612
10-12 115 155 626
11-0 118 159 641
11-4 121 163 656
11-8 124 166 670
11-12 126 170 685
12-0 129 173 699
12-4 132 177 714
12-8 134 181 728
12-12 137 184 743
13-0 140 188 758
13-4 142 192 772
13-8 145 195 787
13-12 148 199 801
14-0 150 202 816
14-4 153 206 830
14-8 156 210 845
14-12 158 213 860
15-0 161 217 874
15-4 164 220 889
15-8 167 224 903
15-12 169 228 918
16-0 172 231 932
16-4 175 235 947
16-8 177 239 962
16-12 180 242 976
17-0 183 246 991
17-4 185 249 1005
17-8 188 253 1020
Note:
• Minimum room area refers to the smallest air conditioned room on the lowest floor of the
residence.
• Minimum total conditioned room area refers to the combined area of all air conditioned
rooms in the residence.
Installation Manual: R-454B Outdoor Split-System Air Conditioner10
Johnson Controls Ducted Systems
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