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High Temperature Furnace Lab & Production Use

horizontal tube furnace

MHI is an energy efficient high temperature furnace and general furnace manufacturer. Our furnaces meet the highest standards for quality, energy efficiency, and performance. From the laboratory scale Z-Series box furnace, robust motorized bottom-loading/opening furnace, to our novel steam furnace with a rapid heat-up rate, Our furnaces have a high temperature heating solution for even the most demanding user. From laboratory, lab scale, prototyping to large scale with established high safety heating devices, furnaces and refractories.

Please give us a call @ 513.772.0404 or contact us for more information about our furnace line.

Some of Our Popular Furnace Models

Turn any MHI furnace into a Hybrid

Box Furnace
High Temperature Box Furnaces
High temperature furnaces
Horizontal Tube Furnaces
bottom loading furnace
Motorized Bottom Opening Furnaces

Large Industrial Horizontal Tube Furnace

Horizontal Tube Industrial Scale

MHI Furnace Features

Safety, Warranty, Non-sag High Temperature Roofs, Unique FiberFree™ Hearths, Great Uniformity

Designed with modern materials and state-of-the-art technology platforms

Top Hat Box Furnace
  • Safety:  Double walled Stainless Steel construction.  This, along with the FiberFree™ refractory, allow for a safe exterior working environment (~50°C or lower). MHI furnaces, where applicable, have three-arm balanced swing away doors that keep the hot surface side away from user.

  • Warranty: Contact us to learn about the best warranty for your furnace

  • High Temperature Furnace Classes: Almost all MHI furnaces are lined with non-toxic FiberFree™ refractory in the furnace chamber. FiberFree™ refractory is a safe-to-use insulation which does not contain any toxic short fibers.  Please check detailed specifications that are provided with quote.

  • Non-sag roof technology: MHI also uses the unique RHD FiberFree™ refractory for the roof of most furnaces. This novel refractory does not crack during cycling at operating temperatures which allows for longer life of the furnace and longer life from the heating elements. Less cracks and longer life means you will be running your furnace more efficiently and have an overall savings (monetary, energy, replacement materials, etc.). This FiberFree™ material advantage is uniquely available from MHI!

  • Robustness: MHI uses nanofractal roof hangers.

  • Unique Hearth Designs: Several bottom loader type furnaces now have floors that come standard with removable hearths. On large bottom loader furnaces we have added a new design feature, which makes the already sturdy door-top fully removable and lockable.  If you ever damage the floor of the door - simply change out this piece without incurring the larger cost for the entire door.  Hearths can reach 2000°C operating temperatures with the unique non-toxic FiberFree™ refractory.

  • Uniformity:  As high as +/- 2°C temperature uniformity for small chambers. Slightly more as the size increases.  Uniformity is related to insulation quality and quantity, furnace design, best heating elements and high class control systems that for example are easily accepted in US government laboratories. Overall care matters when mating ceramics, thick gauge stainless steel and high temperature heating elements.  We often find MHI provides an additional layer of insulation compared to other manufacturers and provides the latest in feedback control electronics.

  • Our heating elements routinely outperform.  MHI offers the highest temperatures and longest life available in MoSi2 heating elements. (Please see customer testimonials for elements)

  • Awards: MHI has received the prestigious R&D100 and other awards for its heating elements, refractory materials, and furnaces. This shows our commitment to innovation and continuous improvement so that you have the highest quality and best performing furnace.

  • Access to best practices and patented technology:  We are a completely integrated high temperature furnace manufacturer which allows us to respond quickly and efficiently to our customers' needs worldwide. MHI has several service testimonials from satisfied customers.

  • Versatile:  MHI furnaces are used in diverse applications from chemical processing, vapor deposition, nano scale processing, materials processing and energy conversion from R&D to prototypes to industrial scale operations.

  • Flexibility:  When appropriate MHI takes significant care in providing versatility.  Mutitap transformers are often provided when we feel the customer may move the furnace over time to a different location.  In some areas of the world there is a need for mutitap transformers in order to cater for long-cycle voltage fluctuations. However it is very important for user to specify correct voltage at time of ordering.

See also:

Robust Top Loader Furnace

Top Hat Box Furnace


Energy Efficient Attractive Furnaces

Easy to lift EYE bolts standard when required.
Attractive Power and temperature control panels.


Steam Ovens

Add Steam to a MHI Furnace or Oven

MHI makes it easy for steam inlet port.  New furnace prices have been dramatically reduced so that a steam inlet port and steam generator may be ordered with the furnace.


208, 220 240V all accomodated in voltages

The mark of high temperature quality from MHI

XPAN control panel

Multi-Tap Transformer

Quality Mark

X-PAN Control Pane

MHI manufactures novel devices when standard furnaces cannot meet your needs.  Please contact us.

What's New :: Read Testimonials :: Conversion Calculator

Please use genuine MHI replacement parts only. With a unique blend of engineering excellence, advanced safety features and impeccable design, every MHI replacement part creates best value for you.

MHI also manufactures: Custom Continuous Convective Ovens and Hydrogen Annealing Furnaces

click here for custom furnaces
Custom Furnaces

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©Micropyretics Heaters International Inc. 1995 - 2016
750 Redna Terrace Cincinnati, OH 45215, USA
Telephone: 513-772-0404 | Fax: 513-672-3333