--- title: 7000 GT Series Atmosphere Industrial Furnace | Lucifer Furnaces description: Explore our 7000 GT Series Atmosphere Industrial Furnace models for efficient operation under inert atmosphere, featuring welded shell, gasketed door, and cost-effective design. Choose from various sizes for your industrial needs. --- [Skip to content](https://www.luciferfurnaces.com/products/7000-gt#main-content) [![lucifer-primary\_imagotype-1200px](https://www.luciferfurnaces.com/hubfs/Logos%20(new)/lucifer-primary_imagotype-1200px.png)](https://www.luciferfurnaces.com?hsLang=en) - [About](https://www.luciferfurnaces.com#about) - [FAQs](https://www.luciferfurnaces.com/faqs) - [Careers](https://info.luciferfurnaces.com/careers) - [Terms & Conditions](https://info.luciferfurnaces.com/terms-conditions) - [Warranty](https://info.luciferfurnaces.com/warranty) - [Products](https://www.luciferfurnaces.com/products) - [Quick Ship Furnaces & Ovens](https://www.luciferfurnaces.com/products-quickship) - [Single Chamber Furnaces](https://www.luciferfurnaces.com/products?type=box_furnace) - [Single Chamber Ovens](https://www.luciferfurnaces.com/products?type=convection_oven) - [Dual Chamber Ovens & Furnaces](https://www.luciferfurnaces.com/products?type=dual_chamber) - [Atmosphere Furnaces](https://www.luciferfurnaces.com/products?atmosphere=inert) - [Specialty Furnaces](https://www.luciferfurnaces.com/products?type=specialty) - [Quench Tanks](https://www.luciferfurnaces.com/products/quench-tanks) - [Parts & Accessories](https://www.luciferfurnaces.com/products/parts?what_are_you_inquiring_about_=Parts%20for%20an%20existing%20oven) - Industry - [Aerospace](https://www.luciferfurnaces.com/industry/aerospace) - [Automotive](https://www.luciferfurnaces.com/industry/automotive) - [Composites](https://www.luciferfurnaces.com/industry/composites) - [Energy](https://www.luciferfurnaces.com/industry/energy) - [Finishing](https://www.luciferfurnaces.com/industry/finishing) - [Laboratory](https://www.luciferfurnaces.com/industry/laboratory) - [Military](https://www.luciferfurnaces.com/industry/military) - [Medical Devices](https://www.luciferfurnaces.com/industry/medical-devices) - [Tool & Die Shops](https://www.luciferfurnaces.com/industry/tool-die) - [Articles](https://luciferfurnaces.com/resources) - [Heat Treatment Chart](https://luciferfurnaces.com/resources/steel-heat-treatment-chart) - [In-House Heat Treating](https://luciferfurnaces.com/resources/benefits-to-heat-treating-in-house) - [Model Selection Guide](https://luciferfurnaces.com/resources/model-selection-guide) - [Understanding AMS2750](https://luciferfurnaces.com/resources/understanding-ams2750-heat-treating-furnace-standards-for-consistent-compliant-results) - [Blog](https://luciferfurnaces.com/resources) - [Contact](https://info.luciferfurnaces.com/contact) - [Request a Quote](https://info.luciferfurnaces.com/request-a-quote) (215) 343-0411 [info@luciferfurnaces.com](mailto:info@luciferfurnaces.com) This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. # 7000GT Series Gas Tight Atmosphere Furnace The 7000 GT Series industrial furnace features a welded shell, gasketed door, and atmosphere ports for higher flow rates, ideal for constant operation to maintain a dry refractory environment and minimize oxidation on workloads, providing a cost-effective alternative to alloy muffle models. ![7GT-K12](https://21225054.fs1.hubspotusercontent-na1.net/hub/21225054/hubfs/Imported%20sitepage%20images/7GT-K12.jpg?width=1200&length=1200&name=7GT-K12.jpg) Model 7GT-K12 ![7GT-A6-Lucifer-Furnaces-8570](https://21225054.fs1.hubspotusercontent-na1.net/hub/21225054/hubfs/Imported%20sitepage%20images/7GT-A6-Lucifer-Furnaces-8570.jpg?width=1200&length=1200&name=7GT-A6-Lucifer-Furnaces-8570.jpg) Model 7GT-A6 with optional Soak Timer ![7GT-B24-Lucifer-Furnaces-8595](https://21225054.fs1.hubspotusercontent-na1.net/hub/21225054/hubfs/Imported%20sitepage%20images/7GT-B24-Lucifer-Furnaces-8595.jpg?width=1200&length=1200&name=7GT-B24-Lucifer-Furnaces-8595.jpg) Model 7GT-B24 with inert door curtain & flowmeter options ![7GT-K36-8224-Lucifer-Furnaces](https://21225054.fs1.hubspotusercontent-na1.net/hub/21225054/hubfs/Imported%20sitepage%20images/7GT-K36-8224-Lucifer-Furnaces.jpg?width=1200&length=1200&name=7GT-K36-8224-Lucifer-Furnaces.jpg) Model 7GT-K36 with optional chart recorder ![7GT-R48-7986-Lucifer-Furnace](https://21225054.fs1.hubspotusercontent-na1.net/hub/21225054/hubfs/Imported%20sitepage%20images/7GT-R48-7986-Lucifer-Furnace.jpg?width=1200&length=1200&name=7GT-R48-7986-Lucifer-Furnace.jpg) Model 7GT-R48   ### [Product Information](https://www.luciferfurnaces.com/hubfs/Product%20Data%20Sheets/7000GT.pdf?hsLang=en) ## Inert Atmosphere GT Box Furnaces Bench and Floor Models for hardening, drawing, preheating, annealing, brazing, normalizing, and special applications under inert atmosphere to 2100°F. The GT Models are designed with a continuously welded furnace shell, gasketed door assembly, and atmosphere inlet and outlet ports for operation with a positive flow of higher atmosphere rates. These models are best suited for constant operation to maintain a dry refractory environment in the work area to minimize oxidation on workloads. The GT system is a less expensive alternative compared to our atmosphere furnaces equipped with alloy muffles (AM Models). Ruggedly constructed and rated for work loads up to 50 lbs. per square foot of hearth area. All models are completely wired, assembled, test-fired, and shipped ready for connection to the main power supply and regulated atmosphere pressure of 5 PSI. Compact design, fast installation, and simple, safe, dependable operation. Available in over thirty standard model sizes. ### Standard Features - Continuously welded sheet metal shell construction with structural reinforcement. - Heavy gauge coil wound low watt density heating elements suitable for atmosphere, for longer life. - Multi-layered energy efficient lightweight firebrick and mineral block insulation for maximum heat storage and minimum heat loss. - Elements mounted in easy-to-replace holders located on side walls, door, and back for uniform temperature. - Hearth plate for load support and floor brick protection. - Double-pivot horizontal swing door with high-temperature ceramic fiber gasket, swing bolts, and handles for a tight seal. - Safety micro-switch shuts off power to elements when the door opens. - Eurotherm digital temperature controller with type K thermocouple and contactor. - Controls are mounted in separate side-mounted NEMA 1 panels and operate on 115 volts.   [Get a Quote](https://info.luciferfurnaces.com/request-a-quote?hsLang=en) ## Model Specifications | Model | Chamber Dimensions | Overall Dimensions | KW | Voltage | Weight (lbs) | | --- | --- | --- | --- | --- | --- | | 7GT-B12 | 9"H X 9"W X 12"D | 27"H X 23"W X 29"D | 5 | 230/460 | | | 7GT-B18 | 9"H X 9"W X 18"D | 27"H X 23"W X 35"D | 6.5 | 230/460 | | | 7GT-H12 | 9"H X 12"W X 12"D | 27"H X 26"W X 29"D | 6 | 230/460 | | | 7GT-H18 | 9"H X 12"W X 18"D | 27"H X 26"W X 35"D | 8.5 | 230/460 | | | 7GT-H24 | 9"H X 12"W X 24"D | 27"H X 26"W X 41"D | 10 | 230/460 | | | 7GT-K12 | 12"H X 12"W X 12"D | 31"H X 26"W X 29"D | 6.5 | 230/460 | | | 7GT-K18 | 12"H X 12"W X 18"D | 31"H X 26"W X 35"D | 10 | 230/460 | | | 7GT-K24 | 12"H X 12"W X 24"D | 31"H X 26"W X 41"D | 13 | 230/460 | | | 7GT-K36 | 12"H X 12"W X 36"D | 31"H X 26"W X 47"D | 15 | 230/460 | | | 7GT-M18 | 12"H X 18"W X 18"D | 54"H X 38"W X 35"D | 14 | 230/460 | | | 7GT-M24 | 12"H X 18"W X 24"D | 54"H X 38"W X 41"D | 15 | 230/460 | | | 7GT-M36 | 12"H X 18"W X 36"D | 54"H X 38"W X 47"D | 18 | 230/460 | | | 7GT-O18 | 18"H X 18"W X 18"D | 60"H X 38"W X 35"D | 15 | 230/460 | | | 7GT-O24 | 18"H X 18"W X 24"D | 60"H X 38"W X 41"D | 20 | 230/460 | | | 7GT-O36 | 18"H X 18"W X 36"D | 60"H X 38"W X 47"D | 25 | 230/460 | | | 7GT-O48 | 18"H X 18"W X 48"D | 60"H X 38"W X 53"D | 32 | 230/460 | | | 7GT-P24 | 18"H X 24"W X 24"D | 60"H X 44"W X 41"D | 23 | 230/460 | | | 7GT-P36 | 18"H X 24"W X 36"D | 60"H X 44"W X 47"D | 32 | 230/460 | | | 7GT-P48 | 18"H X 24"W X 48"D | 60"H X 44"W X 53"D | 40 | 230/460 | | | 7GT-R24 | 24"H X 24"W X 24"D | 60"H X 44"W X 41"D | 30 | 230/460 | | | 7GT-R36 | 24"H X 24"W X 36"D | 60"H X 44"W X 53"D | 45 | 230/460 | | | 7GT-R48 | 24"H X 24"W X 48"D | 60"H X 44"W X 65"D | 50 | 230/460 | | ![lucifer-primary\_imagotype-1200px](https://www.luciferfurnaces.com/hubfs/Logos%20(new)/lucifer-primary_imagotype-1200px.png) Manufacturer of industrial heat-treating furnaces and ovens. Designed and built in the USA since 1946. 2048 Bunnell Road Warrington, PA 18976 (215) 343-0411 [info@luciferfurnaces.com](mailto:info@luciferfurnaces.com) #### Newsletter Receive expert heat treating articles, industry developments, and company news straight to your inbox bimonthly. - [Products](https://www.luciferfurnaces.com/products) - [Single Chamber Furnaces](https://www.luciferfurnaces.com/products?type=box_furnace) - [Single Chamber Ovens](https://www.luciferfurnaces.com/products?type=convection_oven) - [Dual Chamber Ovens & Furnaces](https://www.luciferfurnaces.com/products?type=dual_chamber) - [Atmosphere Furnaces](https://www.luciferfurnaces.com/products?atmosphere=inert) - [Specialty Furnaces](https://www.luciferfurnaces.com/products?type=specialty) - [Quench Tanks](https://www.luciferfurnaces.com/products/quench-tanks) - [Parts & Accessories](https://www.luciferfurnaces.com/products/parts) - [Resources](https://luciferfurnaces.com/resources) - [Heat Treatment Terminology](https://luciferfurnaces.com/resources/heat-treating-terminology) - [Material Safety](https://luciferfurnaces.com/resources/data-sheets-for-material-safety) - [User Guides](https://luciferfurnaces.com/resources) - [FAQs](https://www.luciferfurnaces.com/faqs) - Industries - [Aerospace](https://www.luciferfurnaces.com/industry/aerospace) - [Automotive](https://www.luciferfurnaces.com/industry/automotive) - [Composites](https://www.luciferfurnaces.com/industry/composites) - [Energy](https://www.luciferfurnaces.com/industry/energy) - [Finishing](https://www.luciferfurnaces.com/industry/finishing) - [Heat Treating](https://www.luciferfurnaces.com/industry/tool-die) - [Laboratory](https://www.luciferfurnaces.com/industry/laboratory) - [Military](https://www.luciferfurnaces.com/industry/military) - [Medical Devices](https://www.luciferfurnaces.com/industry/medical-devices) - [Tool & Die Shops](https://www.luciferfurnaces.com/industry/tool-die) - [About](https://www.luciferfurnaces.com#about) - [FAQ](https://www.luciferfurnaces.com/faqs) - [Careers](https://info.luciferfurnaces.com/careers) - [Request a Quote](https://info.luciferfurnaces.com/request-a-quote) - [Terms & Conditions](https://info.luciferfurnaces.com/terms-conditions) - [Warranty](https://info.luciferfurnaces.com/warranty) © 2026 All rights reserved. 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