Lennox LDT180H4M User Manual

Page 10
POWER EXHAUST FAN PERFORMANCE
Return Air System Static Pressure Air Volume Exhausted
in. w.g. cfm
0.00 
0.05 8210
0.10 7725
0.15 7110
0.20 
0.25 
0.30 
0.35 4300
0.40 3510
0.45 
0.50 1840
CEILING DIFFUSER AIR RESISTANCE - in. w.g.
Air
Volume
cfm
󰀨 󰀨
RTD11-185S RTD11-275S
FD11-185S FD11-275S
2 Ends Open
1 Side/2 Ends
Open
All Ends &
Sides Open
2 Ends Open
1 Side/2 Ends
Open
All Ends &
Sides Open
5000 .51 .44  - - - - - - - - - .27 - - -
5200  .48 .42 - - - - - - - - - .30 - - -
5400  .52 .45 - - - - - - - - - .33 - - -
   .48 - - - - - - - - -  - - -
5800 .71  .51 - - - - - - - - -  - - -
   .55  .31 .27 .42 
 .80   - - - - - - - - -  - - -
  .72  - - - - - - - - - .50 - - -
 - - - - - - - - - .42  .31 - - - .34
  .77  - - - - - - - - - .54 - - -
  .83 .72 - - - - - - - - - .58 - - -
7000 1.03 .87   .41   .40
7200   .80 - - - - - - - - -  - - -
7400 1.15  .84 - - - - - - - - - .70 - - -
7500 - - - - - - - - - .51  .41 - - - .45
 1.20 1.02 .88 - - - - - - - - - .74 - - -
8000 - - - - - - - - -   .43 - - - .50
8500 - - - - - - - - -  .58 .50 - - - .57
 - - - - - - - - -   .58 - - - 
 - - - - - - - - -  .75  - - - .74
 - - - - - - - - - 1.00 .84 .73 - - - .81
 - - - - - - - - - 1.10  .80 - - - 
 - - - - - - - - - 1.21 1.01 .88 - - - 
CEILING DIFFUSER AIR THROW DATA - ft.
Model
No.
Air Volume
cfm
1
󰀨
Model
No.
Air Volume
cfm
1
󰀨
RTD11-185S
Step-Down
FD11-185S
Flush
RTD11-275S
Step-Down
FD11-275S
Flush

180
  28 - 37
240
7200 33 - 38 
5800 42 - 51  7400 35 - 40 28 - 37
 44 - 54 40 - 50   
 45 - 55 42 - 51 7800 38 - 43 40 - 50
  43 - 52 8000  42 - 51
   8200  43 - 52
1

󰀨
open.
8400  44 - 54
 44 - 50 
8800 47 - 55 
BLOWER DATA

Lennox LDT180H4M Specifications

General

Brand	Lennox
Model	LDT180H4M
Category	Air Handlers
Language	English