6.0 AIRFLOW PERFORMANCE
Airflow performance data is based on cooling performance with a coil and filter in place.
Select performance table for appropriate unit size, voltage and number of electric heaters to
be used. Make sure external static applied to unit allows operation within the minimum and
maximum limits shown in table below for both cooling and electric heat operation. For opti-
mum blower performance, operate the unit in the .3 to .7 in W.C. external static range. Units
with coils should be applied with a minimum of .1 in W.C. external static.
6.1 AIRFLOW OPERATING LIMITS
Cooling BTUH x 1,000 -018 -024 -030 -036
Cooling Tons Nominal 1.5 2 2.5 3
Heat Pump or Air Conditioning
Maximum Heat/Cool CFM [L/s] 675 900 1125 1350
(37.5 CFM [18 L/s]/1,000 BTUH) [319] [425] [531] [637]
(450 CFM [212 L/s]/Ton Nominal)
Heat Pump or Air Conditioning
Nominal Heat/Cool CFM [L/s] 600 800 1000 1200
(33.3 CFM [16 L/s]/1,000 BTUH) [283] [378] [472] [566]
(400 CFM [189 L/s]/Ton Nominal)
Heat Pump or Air Conditioning
Minimum Heat/Cool CFM [L/s] 540 720 900 1080
(30.0 CFM [14 L/s]/1,200 BTUH) [255] [340] [425] [510]
(360 CFM [170 L/s]/Ton Nominal)
Maximum kW Electric Heating 8 10 10 10
& Minimum Electric Heat CFM [L/s] 450 [212] 690 [325] 690 [325] 690 [325]
Maximum Electric Heat Rise °F [°C] 53° [11.65] 93° [33.8] 93° [33.8] 93° [33.8]
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