COMBAT® by Roberts-Gordon IDF-Series air handlers improve indoor air quality and provide air comfort.
COMBAT® by Roberts-Gordon IDF-Series is one of the most versatile indirect-fi red heating systems. With three fuel
options, three control options, nine discharge choices, horizontal or upright installation, plus a complete line of air
handling and fi ltering accessories, COMBAT® by Roberts-Gordon IDF-Series is designed to last for years with proper
installation, maintenance and use.
MODEL
IDF-35
IDF-45
IDF-50
IDF-65
IDF-75
IDF-85
IDF-100
IDF-125
IDF-150
CFM
3,500-
6,000
3,500-
6,000
4,000-
8,000
4,000-
8,000
6,000-
12,000
6,000-
12,000
6,000-
12,000
10,000-
18,000
13,000-
24,000
Output
[MBH]*
240-
350
240-
450
240-
500
520-
650
520-
750
520-
850
520-
1,000
560-
1,250
560-
1,500
Make-Up Air (MUA) Models
Design:
100% replacement air with a fi xed discharge air volume.
Function:
Supplies direct replacement air for building mechanical exhaust.
Application:
Used as make-up air for paint booths and other industrial
processes which incorporate mechanical exhaust.
Model Confi gurations
Bottom
Discharge
Outside
Air
Bottom
Discharge
Bottom
Return
Outside
Air
Potentiometer Control
Bottom
Discharge
Bottom
Return
Outside
Air
Pressure Gauge
MODEL
IDF-175
IDF-200
IDF-225
IDF-250
IDF-275
IDF-300
IDF-350
IDF-400
IDF-450
CFM
13,000-
24,000
21,000-
37,000
21,000-
37,000
21,000-
45,000
21,000-
45,000
30,000-
45,000
35,000-
57,000
35,000-
57,000
35,000-
57,000
Output
[MBH]*
600-
1,750
600-
2,000
600-
2,250
600-
2,500
720-
2,750
720-
3,000
720-
3,500
1,400-
4,000
1,400-
4,500
Fixed Recirculation (FR) Models
Design:
Manual modulation of outdoor air from 0% to 100% with use of
mixing box and potentiometer.
Function:
Provides effi
cient, low-cost heating where minimum ventilation
rates are required.
Application:
Used in warehouses, distribution centers, retail outlets, etc.
Air Management (AM) Models
Design:
Automatic modulation of outdoor air from 0% to 100% with use
of mixing box and pressure gauge.
Function:
Automatically responds to building pressure and temperature
needs.
Application:
Used in industrial and commercial buildings that have air
quality and specifi c air management requirements.
Combat
®
by Roberts-Gordon IDF-Series
* 1 MBH = 1,000 Btu/h
