2025 Generac Mobile Mobile Heaters MFH900

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Year 2025
Make Generac Mobile
Model Mobile Heaters

Year 2025
Manufacturer Generac Mobile
Model Name Mobile Heaters
Trim Name MFH900
Generic Type (Primary) General
Engine Manufacturer Perkins®
Engine Type 120AF-E44TTA
Emissions 26468271
Cylinder Liners 4
Displacement 4.4 L (268.5 in3)
Engine Power Power @ 2,200 rpm: 140.8 hp (105 kW)
Cooling Liquid cooled
Lubrication 500-hr service interval

The MFH900 flameless heater provides safe and reliable heat for Oil and Gas, Mining, Construction, Utility projects and more. Generac Mobile's flameless heat technology delivers heat without an open flame for use in hazard zone areas in which ignitable flames may be present. The MFH900 includes a brand new design for enhanced safety, serviceability and ease-of-use.

Features may include:

4.4 L Perkins® engine, FT4

865,000 BTU output*

Max temperature output 180° F (82° C)

88%+ heater efficiency

Hydraulic pump loop generates reliable heat in ambient temperatures down to -40° F/C

Rust-proof aluminum enclosure

26-hour run time on one fuel and DEF fill

Safe

Flameless technology produces heat without an open flame

Safe to use in hazard zones in which ignitable fumes may be present

External E-stop switch for emergency situations

External duct connection lighting for enhanced safety

Comprehensive safety alarms and shutdowns

Positive air shutdown to prevent runaway engine

Lockable cabinet to prevent tampering and theft

110% containment of engine fluids

DOT and Transport Canada compliant

Easy to Use

New, easy-to-use intuitive controller
- - Dual outlet ducts allow for separate duct runs and more versatile heating
  - Internal duct storage for convenience, ease-of-transport and theft prevention
  - Choice of one or two duct outlets
  - Single axle trailer for increased maneuverability
  - Roof strobe light indicates operating unit
  - Wide access doors flip up for easy, unobstructed access to maintenance items
  - Interior cabinet lighting for enhanced visibility during maintenance

Engine

Engine Manufacturer Perkins®

Engine Type 120AF-E44TTA

Emissions 26468271

Cylinder Liners 4

Displacement 4.4 L (268.5 in3)

Engine Power Power @ 2,200 rpm: 140.8 hp (105 kW)

Cooling Liquid cooled

Lubrication 500-hr service interval

Fuel System

Fuel Type Diesel

Fuel Usage, 100% Load DEF consumption rate: 0.312 gph (1.18 Lph)

Wheels & Tires

Wheels Tires: 16 in (40.6 cm)

Battery

Battery Two 12 V, 950 CCA, wet cell batteries

Operational

Operating Conditions Heat produced: Up to 865,000 BTU/hr (253.5 kW/hr) | Heater efficiency: Efficiency: 85%

Operating Temperature, Maximum Capable of operating at -40 to 100 °F (-40 to 37.8 °C) ambient—not considering derate factors | Temperature range: 120–180 °F (48.9–82.2 °C) | -22 to 149 °F (-30 to 65 °C)

Run Time Per Tankful Maximum run time: 26 hr

Hydraulics

Oil Filter Spin-on

Airflow 3,500–5,000 ft3 /min (99.1–141.6 m3 /min)

Pump Type Pump: Rexroth 100 cc variable displacement piston pump

Dimensions

Dimensions Air ducts diameter: Two 12 in (30.5 cm) | Rear storage for two 12-in×50-ft air ducts | 192.25 in (4.88 m) | 76.5 in (1.94 m) | 94.25 in (2.39 m)

Hitch Ball Size 2-5/16 in

Capacities

Fuel Capacity Total: 200 gal (757.1 L) | Usable: 176 gal (654.9 L) | DEF tank capacity (Total/Usable): 10 gal (38 L) / 8 gal (30 L)

Cooling System Coolant capacity: 10.3 qt (9.75 L) | Heat transfer fluid Tank capacity: 14 gal (53 L) | Heat Transfer fluid System capacity: 20.6 gal (77.9 L)

Weights

Weight Axle: One 8,000 lb (3,638.7 kg) | Operating: 7,735 lb (3,512 kg)

Dry Weight 6,590 lb (2,992 kg)

Features

Features 110% containment | Type: Flameless, self-contained | Hydraulic oil type: Mobile DTE10 ISO VG68 | Two 10-micron hydraulic oil filters | Emergency stop switch | Positive air shutdown | Self-contained | Automatic shutdown for high hydraulic oil temperature, high hydraulic oil pressure, engine overspeed, low engine oil, low fuel, and low hydraulic oil | Fully lockable – including control box door, service access doors, fuel fill, and DEF fill | Multi-lingual operating and safety decalsDocument holder with owner’s manual – includes DC wiring diagrams | Lift jack | Electric brakes | Transportation tie downs | Forklift tubes | DOT approved lights: Tail, brakes, and directionals | Wachendorf® controller and display | TFT color graphic LCD display with LED backlight

Construction Material Enclosure Material: Aluminum with powder coat

Warranty

Warranty 1 year, unlimited hours

2025 Generac Mobile Mobile Heaters MFH900