Brochure

C
US
9
75-136.49
Request Catalog 5-174 For Complete Technical Information and Specifications.
GAS-FIRED, GRAVITY AND POWER-VENTED DUCT FURNACES
Low Initial Cost Applications Cover Heating and/or Make-Up Air 75,000 to 400,000 Btu/Hr Input Capacity
82% Minimum Thermal Efficiency Low Maintenance Easy to Service
MODEL DFG
GRAVITY VENTED
The Modine indoor duct furnace was designed for use with a building’s heating, heating/
cooling and make-up air systems. Available in 11 model sizes, in both gravity and power
vented configurations, the unit covers a wide variety of applications. They have input
ranges from 75,000 to 400,000 Btu/Hr and can operate on either natural or propane
gas. The airflow direction can be specified when ordering the unit. The duct furnace is
certified for location either upstream or downstream from cooling coils and has a drain
pan that allows connection to a condensate drain line.
Standard features include:
C.S.A. certification.
ETL certification.
All units a minimum of 82% thermally efficient.
20 gauge aluminized steel cabinet.
Certified to 3.0" W.C. external static pressure for high static applications.
Optional features include:
409 stainless steel heat exchanger and burner.
409 stainless steel drip pan.
Two-stage and electronic modulation controls for either natural or propane gas.
Building management compatible gas conrols for modulation control using 0 - 10 Vdc
or 4 - 20 mA input.
High and/or low gas pressure switches.
Table 9.1 - DFG/DFP Duct Furnace Performance Data ➁ ➂
Ratings are shown for elevations up to 2,000 feet.
Model DFP units approved for use in California by CEC.
When high rates of CFM are used, the air distribution baffle may be removed to reduce the pressure drop through the duct furnace.
DFG is design certified by CSA for the gas heating furnace section, and ETL for the electrical controls.
DFP is design certified by ETL for both the gas heating furnace section and the electrical controls.
Btu/Hr Without Air Baffle With Air Baffle
DFG/DFP
Temperature Rise Temperature Rise
Model Size
Input Output
Range (°F)
CFM Range
Range (°F)
CFM Range
75 75,000 61,500 20 - 60 926 - 2,778 20 - 100 556 - 2,778
100 100,000 82,000 20 - 60 1,235 - 3,704 20 - 100 741 - 3,704
125 125,000 102,500 20 - 60 1,543 - 4,630 20 - 100 926 - 4,630
150 150,000 123,000 20 - 60 1,852 - 5,556 20 - 100 1,111 - 5,556
175 175,000 143,500 20 - 60 2,160 - 6,481 20 - 100 1,296 - 6,481
200 200,000 164,000 20 - 60 2,469 - 7,407 20 - 100 1,481 - 7,407
225 225,000 184,500 20 - 60 2,778 - 8,333 20 - 100 1,667 - 8,333
250 250,000 205,000 20 - 60 3,086 - 9,259 20 - 100 1,852 - 9,259
300 300,000 246,000 20 - 60 3,704 - 11,111 20 - 100 2,222 - 11,111
350 350,000 287,000 20 - 60 4,321 - 12,963 23 - 100 2,593 - 11,111
400 400,000 328,000 20 - 60 4,938 - 14,815 27 - 100 2,963 - 11,111
MODEL DFP
POWER VENTED
DO NOT LOCATE ANY GAS-FIRED UNIT IN AREAS WITH CHLORINATED,
HALOGENATED, OR ACIDIC VAPORS IN ATMOSPHERE.