Electric Process Air and Process Gas/Fluid Heaters.  

  • Compact
  • Very high turn down ratios
  • Ultra-low pressure drop 
  • High temperature and efficiency 
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Ultra-low pressure drops, High turn-down ratios, Outlet temperature 400°C-1200°C, Inlet temperature depending on model, up to 500°C, choice of shell pressure, choice of unique construction for even reactive and toxic gases like ammonia to mono-silane.  New high-value duct modules for transforming combustion ovens to electrically powered air heating.  Ask MHI for the best warranty on heating systems. MHI offers inline air heaters, compressed air heaters, process air heaters, jet heaters, hot temperature air heaters, electric plenum heaters.  MHI offers several models from low KW to MW and duct heaters.  MHI can provide Airtorch® units that span a wide range of flows for the same output temperature rating.  Process Gases are Air, Ar (Argon), O2 (Oxygen), CO2 (carbon dioxide), sCO2, N2 (Nitrogen), Syn-Gas, CH4 (Methane or Natural Gas), H2 (Hydrogen), CO (Carbon Monoxide), H2O (Steam) and many more.  Each requires special materials and construction.  Several  specialty patented designs.  Save energy by using the MHI SH models for high input temperature.  Experience low pressure drop and high pressure enclosures with fully stamped ASME, UL, ATEX and CE codes. Rapid heat rise units.

GTA Hinged

MHI uses industry tested electric control panels.  High life warranty.  MHI is a known brand.  Compare price, energy savings, life, and warranty.

MHI customers are the first to be offered the most recent upgrades.  The company offers a very attractive NeverDown™ policy.

Energy Savings with a MHI Electric Airtorch®.

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The Airtorch® is a highly efficient scalable electric process air/gas heater.  MHI Airtorch® systems offer patented low pressure drop technology called the Direct Flow Drop.   Industry leading quality, price and delivery.  Experience low pressure drop.  Low pressure drop equals savings.  For a 2000 SCFM flow when you save ~5 psi in pressure drop,  it equals about 30 KW in power-savings. This is almost a savings of $25,000 per year.

MHI provides units for 750°C, 1000°C,1100°C and 1200°C.  The typical Airtorch® use is illustrated in the Airtorch®  Infographic.

Use the Airtorch® for a future with low CO2 emissions and abundant renewable energy supply. Ask about the MHI warranty?

New*-In line GiantHeat™ Liquid Bh-Ima Heaters™  for Oil Pipelines.  High Efficiency.  High Reliability. *Contact.

Vertical configurations

Why choose the MHI Airtorch®? Low operational cost because of very low pressure drop (~1psig, much lower for Duct Heaters), noise-free,  quick-start, high temperature capable – which also implies longer-life at lower temperatures when compared to process gas heaters that cannot reach high temperatures.   Several models in stock – all quality engineered and carefully manufactured.  Decades of electrical heating experience.

What is New

New Prices.  Higher temperature.  More compact.

Extremely low pressure drop. Fibonacci heaters.

Multiple third party ratings:  ASME, UL, cUL, CE, ATEX.

Compact Duct Heaters. DH model 240 KW -7 MW shown below unit is  100 KW ~12″ long and 0.1 psi pressure drop.

 Extremely compact. Extremely efficient. Very low pressure drop.  320 KW.   Easy to install in a duct. Ultra-low pressure drop.

18 Bar

6 Bar-240 Bar

Saddles are provided as well as blind flanges

One year warranty on heaters (Information)

Duct Heaters

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 Airtorch® Models

Why are the MHI Airtorch models efficient? Prices scale with power, temperature and pressure. Please discuss your best value with MHI, 

The following classes are available:

  • LTA – Up to 1000°C. LTA is a process heater for air which requires a compressed air input.
  • VTA – Up to 900°C. VTA is process gas heater with fan or blower with low flow sensor capability.   New* VTA with fan models for 1100°C.
  • MTA925 and GTA925  up to 1000°C and MVTA or GVTA up to 1100°C.  These are flow or inline sealed process gas heaters which can take compressed air or compressed gas input.  New Models for MVTA-DPF-DNA Class. Contact MHI.
  • DPF, VTA-MPDNA and GPD-MPDNA – Up to 1150°C-1250°C/~2200°F. DPF models can take fan or blower input as well as a compressed air/gas input.
  • Large Flow MVTA DNA SH.  For 1000-1100°C. These are sealed process gas heaters with  blower or inline capability. High KW – High Flow.
  • Large Flow GTA – For high pressure vessel Airtorch® use. Custom engineering. Please contact us directly for assistance. Experience low pressure drop savings.

New:  Inline-Airtorch™ models for process heat are now offered with input up to 20°C-800°C into the Airtorch®. The output is up to 1200°C (~2150°F).

Please contact MHI for Airtorch® and Airtorch®-recuperation uses.  Smart Recuperators,

Typical Applications from Simulation, Chemical Reactions, Heating Reactions, Drying and so many more.

Simple 5-step selection guide and flow as a function of temperature for various models.

Energy efficiency and uniformity of impinged surfaces.

Airtorch Manifolds and Connectors (an MHI speciality)

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*Unit Life and Safety: MVTA units provide forgiveness for temperature exposures beyond their rated capacity by an extra 100°C.

High Power MVTA or High Pressure GTA. The typical Airtorch® model output is up to 1200°C (~2150°F) depending on its rating. They offer high flexibility and good control of for process heaters.  Room temperature is assumed as 25°C for standard input in most models – whereas the (HI) models allow even a 600°C input.   Single Phase Power to Three Phase Choose from 1KW, 3 KW, 4 KW, 12 KW, 24KW, 36KW, 60KW, 120KW, 144 KW, 180KW, 216 KW, 300KW,400KW, 1 MW, 2.2 MW, 4 MW and higher.  Choice of pressure vessels.  Plug in Voltages 120V, 240V, 380V, 400V, 440V, 480V, 600V.

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Temperature Lower Power (1-12 kW) High Power (36-600 kW)
600-900°C LTA, VTAMTA925 MVTA-900-(DNA) Models


MVTA-900-(DNA) Models MVTA-1000-(DNA) Models


1200°C/1300°C DPF Models


High Pressure Enclosures (GTA, GVTA) Up to 1200°C

Introduction to Airtorch® | Airtorch® Applications | Calculating Power vs Flow Rate | Easy Design Criterion

Properties of Gases & Moist Air with Temperature.   Why conserve energy.

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Very High Temperature

Operating Temperatures to 1200°C/~2150°F.  DPF models can take fan or blower input as well as a compressed air/gas input.

Important volumetric conversion.[ 1 m³ = 35.315 ft³ ]

MHI special technologies allow for:

  • Incredible Warranty.
  • Inlet temperatures can be high on specific models MVTA.
  • Pressure drop: Very Low. MHI offers DirectFlow™ Airtorch.
  • We take advantage of our combined thermal knowledge across diverse equipment offerings to optimize and provide low friction Airtorch systems.
  • Quick Selection Guide: If the flow rate is is of the order of 2-40 scfm please choose MTA, VTA or LTA models or the MVTA925 models with flanges.  If the flow is higher than 40 scfm, please choose from the highly energy efficient MVTA models.
  • If the temperature required is above 1100°C please choose the DPF models.
  • When comparing Airtorch heating to other methods please note that the MHI Airtorch systems do not produce any appreciable sound.

Quick Units-Conversion : (800°C=1472°F) (925°C=1697°F) (1000°C=1832°F), (1100°C=2012°F) (5 Bar=0.5 Mpa)

Need higher temperatures? Please don’t hesitate to give us a call or contact us. The kW required depends on the temperature of the exit gas from the Airtorch™ models and the flow volume required. Please use Easy Design Criterion or please use this formula to calculate approximate temperature vs. flow rate for a fixed power for an Airtorch™ model number. MHI also provides flow rate vs. temperature for TA and DPF models. Request Graphs.

Allowed Air/Gas Inputs: Air/Gas from compressor or blower or fan may be attached (varies by model). Some Airtorch models also accept high temperature feed gas as an input. Airtorch™ models are highly efficient electric process heaters (inline, cross line and independently standing models are offered). DPF models have very low pressure drop associated with them. Inputs such as Gas Cylinders, Compressors, Blowers and even fans may be used depending on the model.

Airtorch Operation: The flow rate and temperature are connected. The heater cannot go beyond its rated temperature or power. The thermocouple is integral to the heater.The principle of an air/gas heater is for flowing gas to heat within the residence time of heater/configuration. The flow temperaturecurve is given on Power Vs Flow Calculator. This is shown for air and can easily be converted for different gasses and supercritical CO2  (sCO2) recuperators used for a Brayton cycle demonstration.

Flow Rate is Important: If using a blower or fan the air flow will be controlled by the characteristics of the fan or blower. Fans are employed when the drop in pressure of the system is no greater than approximately 50 in. w.c. (50 in. w.c./inches of H20 is approximately 1.8psi.) This condition remains true even when the fan output large CFM values. Blowers are considered in circumstances where larger pressure drops are present.

Every MHI Airtorch has a maximum power rating, a maximum temperature and a pressure rating (if rated to higher than 1 atmospheric pressure i.e. the GTA models). Please follow the curve on Easy Design Criterion while operating safely within the device ratings. The power should be fixed close to the rated power. Please observe limits with care. Please maintain a low flow cutoff sensor if used close to the highest rated temperature.  MHI Airtorch models are provided with multiple control and safety thermocouples plus other safety devices.

FAQ?. Whether to use Compressor or Blower?  What are MHI SmartDevices.

Ans: The Air torch units accept all inputs. The most important issue is to not fall below the minimum SCFM rating or temperature for the maximum rated power. Fans are employed when the drop in pressure of the system is no greater than approximately 10-50 in. w.c.

MHI Airtorch uses:  Industrial Equipment, Combustion Simulation, Test Beds, sCO2 heating simulation-power cycles, CO2 heating even for chemicals even to make carbon nitrides, CO heating for clean reduction, clean method of waste to fuel including integration with modern high quality steam,  Lab and Analytical Equipment Medical Equipment, Military and Defense, Rubber and Plastics, Pharmaceutical,  Pharmaceutical Equipment, Transportation, Water and Waste Water, Commercial, Adhesive Activation, Food Service Process Heat, Chemical Reactions, Laboratory,  de-soldering Heat Staking,  Melting, Energy Processes, Climate safe benefit, Energy, Soldering, Welding- Brazing, Weld preheat, Semiconductor, Medical, Preheating Gasses High speed heat shrink, Curing adhesives, Hot Air Processor, Powder drying and high temperature high velocity regime, Automotive, Packaging & Sterilization, Paper/Printing, Bio-Fuels, Digestion, Semiconductor processing, Soldering/Brazing, Textiles, Semiconductor, Energy Processes, Nuclear, Bio, Diesel, CyanoCarbons and Oxides, Process heater, gas heater, powder, gas pre-heater, air-pre-heater, supplemental heater and many other process heating applications.

MHI Airtorch® products are used as components in a product for chemical process use, for thermal energy storage systems and a variety of other applications.

Flow simulation whether combustion or high temperature viscous. wafer processing, metal finishing, Solvent drying, steam and air hybrid process heaters, Flow Air Heating, preheating, Hot Air Processor, Shrink Fitting, Synthetic Fabric Sewing. Pressure vessel, simulate, Baking, Laminating, Mold and Curing for many sectors, Drying and Vulcanazation temperature control,  Metal Working, Packaging, Plastic Welding, Sealing, Soldering and brazing, In-line heaters, Compact heaters, Parts cleaning, Biomass extraction , Bio- reclamation, Photo-resist material, Semiconductor processing equipment, Supercritical fluid heating, Solvent replacement, Test beds, Life Sciences, Air, Steam, sCO2, Photovoltaic, Semiconductor processing, Curing and Drying, Electronics, Efficient Heat Shrinking, Thermoforming/Sealing […]

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