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Forced Air Heaters

Forced air heaters push a high-BTU heated air stream to warm large open spaces fast. Kerosene, propane, and natural-gas models from 60,000 to 600,000 BTU cover garages, warehouses, and construction sites up to 15,000 square feet.

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Mi-T-M MH-0375-LM10 Propane Forced-Air Heater – 375,000 BTU, 9,000 Sq Ft, Thermostat

Mi-T-M
In stock

MH-0375-LM10 High-Output Propane Forced-Air Heater The Mi-T-M MH-0375-LM10 adjusts from 225,000 to 375,000 BTU to heat about 9,000 square feet, the...

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Original price $1,273.99 - Original price $1,273.99
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Mi-T-M MH-0150-NM10 Natural Gas Forced-Air Heater – 150,000 BTU, Thermostat, 3,800 Sq Ft

Mi-T-M
In stock

MH-0150-NM10 Natural Gas Forced-Air Heater The Mi-T-M MH-0150-NM10 runs on a natural-gas line rather than a cylinder, putting out 150,000 BTU to he...

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Original price $709.99 - Original price $709.99
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Mi-T-M MH-0150-LMT0 Propane Forced-Air Heater – 150,000 BTU, Thermostat, 3,800 Sq Ft

Mi-T-M
In stock

MH-0150-LMT0 Propane Forced-Air Heater with Thermostat The Mi-T-M MH-0150-LMT0 is the thermostat-equipped version of the 150,000 BTU propane forced...

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Original price $868.99 - Original price $868.99
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Mi-T-M MH-0150-LM10 Propane Forced-Air Heater – 150,000 BTU, 3,800 Sq Ft, Adjustable

Mi-T-M
In stock

MH-0150-LM10 Propane Forced-Air Heater for Large Areas The Mi-T-M MH-0150-LM10 runs on propane with adjustable output of 120,000, 135,000, or 150,0...

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Original price $425.99 - Original price $425.99
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Mi-T-M MH-0060-LM10 Propane Forced-Air Heater – 60,000 BTU, 1,500 Sq Ft, Adjustable

Mi-T-M
In stock

MH-0060-LM10 Propane Forced-Air Heater for Shops The Mi-T-M MH-0060-LM10 runs on propane with adjustable output of 40,000, 50,000, or 60,000 BTU to...

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Original price $362.99 - Original price $362.99
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Mi-T-M MH-0600-0M11 Kerosene Forced-Air Heater – 600,000 BTU, 15,000 Sq Ft, Wheeled

Mi-T-M
In stock

MH-0600-0M11 Industrial Kerosene Forced-Air Heater The Mi-T-M MH-0600-0M11 produces 600,000 BTU to heat about 15,000 square feet, the largest keros...

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Original price $4,375.99 - Original price $4,375.99
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Mi-T-M MH-0400-0M11 Kerosene Forced-Air Heater – 400,000 BTU, 10,000 Sq Ft, Wheeled

Mi-T-M
In stock

MH-0400-0M11 Wheeled Kerosene Forced-Air Heater The Mi-T-M MH-0400-0M11 delivers 400,000 BTU to heat about 10,000 square feet, a wheeled unit for l...

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Original price $2,776.99 - Original price $2,776.99
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Mi-T-M MH-0215-0M11 Kerosene Forced-Air Heater – 215,000 BTU, 5,375 Sq Ft, Multi-Fuel

Mi-T-M
In stock

MH-0215-0M11 Kerosene Forced-Air Heater for Large Structures The Mi-T-M MH-0215-0M11 puts out 215,000 BTU to heat about 5,375 square feet, the top ...

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Original price $893.99 - Original price $893.99
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Mi-T-M MH-0190-0M11 Kerosene Forced-Air Heater – 190,000 BTU, 4,750 Sq Ft, Multi-Fuel

Mi-T-M
In stock

MH-0190-0M11 Kerosene Forced-Air Heater for Warehouses The Mi-T-M MH-0190-0M11 produces 190,000 BTU to heat about 4,750 square feet, sized for ware...

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Original price $885.99 - Original price $885.99
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Mi-T-M MH-0135-0M11 Kerosene Forced-Air Heater – 135,000 BTU, 3,375 Sq Ft, Multi-Fuel

Mi-T-M
In stock

MH-0135-0M11 Kerosene Forced-Air Heater for Large Bays The Mi-T-M MH-0135-0M11 delivers 135,000 BTU to heat about 3,375 square feet, a step up from...

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Original price $667.99 - Original price $667.99
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Mi-T-M MH-0075-0M11 Kerosene Forced-Air Heater – 75,000 BTU, 1,875 Sq Ft, Multi-Fuel

Mi-T-M
In stock

MH-0075-0M11 Kerosene Forced-Air Heater for Job Sites The Mi-T-M MH-0075-0M11 puts out 75,000 BTU to heat about 1,875 square feet on a job site, ga...

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Original price $437.99 - Original price $437.99
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Forced Air Heaters for Construction and Restoration

Why Forced Air Heats a Big Space Fastest

A forced air heater burns fuel and drives the heated air out with a fan, so warmth reaches the far corners of a large open area in minutes instead of radiating slowly from one spot. That air movement is why contractors, restoration crews, and warehouse managers reach for forced air when a space has to come up to working temperature on a schedule. Output runs from 60,000 BTU for a single-bay garage to 600,000 BTU for an open 15,000 square foot floor, so the heater matches the room rather than forcing the room to wait on an undersized unit.

Kerosene, Propane, or Natural Gas

Kerosene and multi-fuel models deliver the highest BTU per gallon and run off a self-contained tank, which suits remote sites with no utility hookup. Propane forced-air heaters light instantly and burn clean off standard cylinders. Natural-gas models connect to a building line for continuous heat with zero refueling. All three demand fresh-air makeup and a carbon-monoxide detector in the space; the OSHA temporary heating standard covers ventilation and placement on job sites.

Sizing and Placement on Site

Point the heater across the space, not at a wall, and keep the air path clear of tarps and materials. Allow roughly 45 BTU per square foot in an uninsulated space and less in a sealed, insulated one. For continuous overnight runs, a thermostat-equipped model holds temperature without manual cycling. Related: Portable Heaters · Kerosene Heaters · Propane Heaters. A thermostat-controlled option like the MH-0375 propane forced-air heater holds a set temperature across a 9,000 square foot space.

Frequently Asked Questions

How many BTU does a forced air heater need per square foot?
Plan on about 45 BTU per square foot in an uninsulated or open space, dropping to 20 to 30 BTU in a sealed, insulated room. A 150,000 BTU unit covers roughly 3,800 square feet of typical jobsite space.
Can I run a forced air heater off a 20 lb propane tank?
Smaller propane forced-air heaters run off a 20-pound cylinder, but high-BTU models draw enough fuel that a 100-pound tank or larger is needed to avoid regulator freeze-up during long runs.
What is multi-fuel on a kerosene heater?
Multi-fuel models burn kerosene, diesel, #1 and #2 fuel oil, or JP-8, which lets crews use whatever fuel is already on site instead of stocking a dedicated supply.
Do forced air heaters need electricity?
Yes. The fan and ignition need a standard 120V outlet or a generator. Kerosene and propane provide the heat, but the blower will not run without power.

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