Atmosphere furnaces process parts in a controlled gas environment to prevent oxidation during carburizing, annealing, and other heat treating cycles. Surface’s lineup includes our industry benchmark Allcase® Batch Integral Quench Furnace, as well as Pit Furnaces, Rotary Retort, and more. These atmosphere furnaces support processes including annealing, carburizing, carbonitriding, and marquenching.
Vacuum furnaces remove air and contaminants from the chamber to process parts without an outside atmosphere. Surface Combustion’s vacuum line includes the VacuDraw® tempering furnace, Power Convection® Furnace, Cloverleaf™ Vacuum Furnace, and more. These furnaces support processes including annealing and brazing.
Batch furnaces process a fixed load of parts through a heating, holding, and cooling cycle before unloading. Surface Combustion’s batch line includes the Allcase® Batch Integral Quench Furnace, VersaQuench® Quick Quench Furnace, Uni-DRAW® batch temper furnace, and more.
Continuous furnaces move parts through the furnace on a belt, roller, or rotating hearth for uninterrupted, high-volume processing. Surface Combustion’s continuous line includes Mesh Belt furnaces, Roller Hearth furnaces, Rotary Hearth furnaces, and more. These furnaces support high-volume carburizing cycles and other processes such as annealing and hardening.
RX® and DX® gas generators produce consistent, on-site controlled atmospheres, reducing dependence on outside gas suppliers. RX® endothermic generators create the base carbon potential for carburizing, carbonitriding, ferritic nitrocarburizing, and neutral hardening. DX® exothermic generators produce an inert atmosphere for bright annealing, bluing, brazing, normalizing, purging, sintering, and tempering.
Surface Combustion’s process control systems manage furnace temperature, atmosphere, and material handling across continuous and batch heat treat lines, using open-architecture programmable controllers and advanced SCADA systems.
Surface offers a diverse line of industry-leading heat treat and thermal processing equipment built on 110 years of engineering expertise, industry knowledge, and technical support. From aerospace and automotive to fasteners, gears, and powder metals, we serve the industries that depend on precision heat treating every day. Talk to our team about your objectives and we can custom design a solution for you today.
Furnace Selection Guide
Let’s find an innovative, efficient heat treat furnace solution for your thermal process needs. Our furnace selection guide is a great place to start.




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As your heat treatment furnace manufacturer, Surface has a top-notch customer service department, backed by decades of experience and historical documentation.
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Surface genuine replacements parts are backed by 110 years of knowledge and experience that only an OEM can provide.
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Surface provides maintenance and upgrades by offering retrofit packages. Our technicians have the expertise to complete Machine Repair Overhaul (MRO) and furnace overhaul.
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Since 1915, Surface Combustion has been solving thermal processing challenges for a wide range of industries. That’s 110 years of moving our customers forward with trusted experience and expertise. How can we help you?

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Why choose Surface?
We are the standard heat treat leaders have trusted for 110 years. When your operations demand consistent metallurgical results, Surface Combustion delivers industry leading solutions, reliable service, and family-driven values, all built into equipment manufactured right here in the USA.
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