Skip To The Main Content
OLearys Equipment

Contractors Equipment

  • Rentals
  • Sales
  • Service
  • Parts
(773) 252-6600 Location Contact Us FAQs


Allmand Maxi-Heat MH500iQ FCS

Available For Rent
Available For Purchase

Now equipped with a Fluid Containment System and double-wall single-cell metal fuel tank , the MH500iQ FCS is ready for the harshest of conditions.
• iQ analyzer detects the environmental temperature and pressure, suggests the correct setting of the burner and automatically configures the nozzles eliminating the need to change them as the altitude changes.
• Twin heater units, producing a maximum of 1,000,000 combined BTUs, may be operated independently depending on heating requirements. Standard 16 inch heater outlet flanges and optional flexible ducting provide a wide variety of heat distribution options.
• CAT or optional Isuzu liquid-cooled 1800-rpm diesel engine with 9 kW transform- er-regulated generator provides power to operate heater blowers and safety systems.

Product files and documents

MAXI-HEAT MH500iQ Spec Sheet PDF file, 853.67 KB
Maxi-Heat MH500iQ Manual PDF file, 23.38 MB



Caterpillar C1.5 T4F liquid-cooled diesel (standard)

Isuzu 3CE 1.6L liquid-cooled diesel (optional)

Low oil pressure / high temperature automatic shutdown


60 Hz, 9 kW single-phase


12 volt electric - Group 8D battery

Glow plugs (CAT)

Engine block heater

Intake air heater (Isuzu)

Fuel Capacity

175 gal double-wall single-cell metal fuel tank


(2) MCS500iQ indirect-fired twin heating units

Up to 500,000 BTU/hr each

1-16 in. duct flange per heater

Optional flexible ducting easily connects to heater output flanges

2.3” wc static pressure allows use of 110 ft. (33.5 m) of 16 in. ducting

Electronically-controlled temperature

Easy-clean combustion chamber

(2) automatic nozzles

iQ controls environmental temperature/pressure and suggests correct burner settings

Heated Air Output

6,200 CFM total with no ducting

Temperature Rise

185° F (85° C)


Fluid containment system

Safety chains

Formed, welded steel frame

Front screw jack

Adjustable height combination 25/16 in. Bulldog, 3 in. pintle towing hitch

Hour meter

Heavy-gauge steel enclosure

Interior compartment light

Lockable access doors

Stop/turn/tail lights

6,000 lbs. (2,722 kg) leaf spring axle

Electric brakes


Height: 87.3”(2.22 m)

Length: 193.3”(4.91 m)

Width: 80” (2.03 m)

16 in. (40.6 cm) wheels and tires


Dry: 3,675 lbs. (1,667 kg) | Wet: 6,000 lbs. (2,722 kg)


Fabric-elastometer ducting 16 in. x 20 ft.

Remote thermostat

Fabric-elastometer ducting 12 in. x 24 ft.

16 in. slip lock duct connectors / bands

CSA/Transport Canada Package

Duct storage box

12 in. or 20 in. dual duct outlet end cap

Emergency air shutoff valve