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- Configuration & install support we spec the temperature grade, controller and safety package to your process
- US-based service & spares Carbolite Gero calibration, parts and support handled locally
Furnances, Industrial Ovens
Carbolite Gero HT High-Temperature Industrial Oven – 400–700°C | 28–350 L
High-temperature industrial oven in four grades — 400, 500, 600 and 700 °C — and four chamber sizes from 28 to 350 L. Robust construction, a stainless-steel liner and perforated shelves handle ageing, tempering, stress relief and high-temperature curing in air.
- ✓ Four temperature grades — 400, 500, 600 and 700 °C
- ✓ Four chamber sizes — 28, 95, 220 and 350 L
- ✓ Robust build — stainless-steel liner, perforated shelves, door switch
- ✓ Configured to order — lead time on request; install & support included
Price held 7 days after order.
Install + training included
Tailored service plan
What your process engineer actually checks
What your process engineer actually checks
High-temperature heat in four grades
HT4–HT7 cover 400, 500, 600 and 700°C so you buy the grade your process needs. A stainless-steel liner, perforated stainless shelves and robust construction with a door switch handle repeated high-temperature cycles at ±5°C uniformity.
An applications engineer on the line
Questions on soak temperatures, whether your process tolerates air, or which grade and size to pick? Our engineers run heat treatment in-house at AO Metal. Sub-4h reply, NDA standard.
400–700°C
Max temperature
28 / 95 / 220 / 350 L
Chamber volumes
±5°C
Uniformity
301
Controller
About this product
The Carbolite Gero HT is a high-temperature industrial oven built in four maximum-temperature grades — 400, 500, 600 and 700°C — and four chamber sizes from 28 to 350 litres. Robust construction, a stainless-steel liner and perforated stainless-steel shelves handle demanding heat-treatment duty, and a door switch and 301 controller come as standard. It reaches temperatures well above a general 300°C oven, covering air-atmosphere processes such as ageing, tempering, stress relief and high-temperature curing. Options include multi-segment programmers, over-temperature protection, a viewing window and a stoving & curing package for solvent extraction.
Why engineers choose the HT
High-temperature air heating in four grades and four sizes — figures below are from the Carbolite Gero datasheet.
Four temperature grades
HT4 (400°C), HT5 (500°C), HT6 (600°C) and HT7 (700°C) — pick the grade that matches your process rather than paying for headroom you don’t use.
Four chamber sizes
28, 95, 220 and 350 L chambers — one design from bench-scale batches to larger production loads, with perforated stainless-steel shelves.
Robust industrial build
Stainless-steel liner, heavy-duty construction and a door switch that isolates power when the door opens — engineered for reliable, repeated high-temperature cycles.
301 control + options
301 controller with single ramp to setpoint and process timer; multi-segment programmers, over-temperature protection, viewing window and a stoving & curing option (adds 1500 W) are available.
How Additive Plus delivers it
Configured to order, installed and validated by engineers who run heat treatment in-house.
Step 01
Configure to your process
Pick temperature grade (400–700°C), chamber size (28–350 L), controller and options — over-temperature protection, viewing window, stoving & curing, extra shelves.
Step 02
Install & support
US-based delivery and setup, operator guidance, and Carbolite Gero spares and service handled locally.
Step 03
Validate your cycle
We help set ageing, tempering, stress-relief or curing temperatures and ramp rates for the alloys and parts you process — and can run trials at AO Metal.
Temperature grades & chamber volumes
| Model | Max temp | Available chamber volumes |
|---|---|---|
| HT4/x | 400°C | 28, 95, 220, 350 L |
| HT5/x | 500°C | 28, 95, 220, 350 L |
| HT6/x | 600°C | 28, 95, 220, 350 L |
| HT7/x | 700°C | 28, 95, 220 L |
Minimum operating temperature is approximately ambient +60°C. Full per-model dimensions, shelf loading, recovery times and power ratings are in the Specifications tab.
Typical applications
Where a 400–700°C air oven earns its place in an AM and materials workflow.
Ageing & tempering
Air-atmosphere age-hardening and tempering
Stress relief
Low-oxidation-tolerant metal AM parts in air
High-temperature curing
Coatings, resins and adhesives above 300°C
Debind pre-heat & drying
Low-temperature debind and high-temp drying
Materials & process R&D
Thermal trials up to 700°C in air
Not sure the HT is the right oven?
If you need a controlled atmosphere, larger capacity or a lower-temperature production oven, a sibling Carbolite Gero oven may fit better.
Need inert atmosphereHTMA Atmosphere OvenView oven →
Need larger capacityLGP Large Industrial OvenView oven →
300°C production ovenGP Industrial OvenView oven →
Need larger capacityLGP Large Industrial OvenView oven →
300°C production ovenGP Industrial OvenView oven →
Tell us your alloy or material, target temperature and part size — and whether the process tolerates air — and our applications engineer will confirm the right HT grade and size, or point you to an atmosphere oven if you need one. Configurations are priced per specification.
Why source through Additive Plus
- AM heat-treatment expertise — soak temperatures, ramp rates and atmosphere guidance for the alloys and parts you process, not just oven delivery.
- In-house heat treatment at AO Metal — we run post-processing on LPBF parts and can validate a cycle before the oven ships.
- US-based support and consumables — Carbolite Gero service, spares and calibration handled locally.
- Sub-24h engineer response — on every enquiry, with leasing and financing available.
| Brand | Carbolite Gero |
| Models | HT4, HT5, HT6, HT7 |
| Max temperature | 400 / 500 / 600 / 700°C |
| Chamber volumes | 28 / 95 / 220 / 350 L |
| Temp uniformity | ±5.0°C |
| Min temperature | Ambient +60°C |
| Interior | Stainless steel liner, perforated SS shelves |
| Controller | 301 (ramp to setpoint + timer) |
Don't see your size or temperature?
Carbolite Gero ovens are configured to order across dozens of chamber sizes, temperature grades and controller options — including AMS2750F (Nadcap) and clean-room builds. Tell us your process and we'll spec the right one.
Other products teams run alongside Carbolite Gero HT High-Temperature Industrial Oven – 400–700°C | 28–350 L
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Rapid-cooling oven for annealing thermoluminescent dosimeters (TLDs) — 400 °C in a compact 3 L chamber with a CC-T1 programmable controller that automatically activates a cooling blower for defined, repeatable cool-down and reproducible dosimeter readings.
- ✓ Automatic rapid cooling — CC-T1 controller triggers the cooling blower on a set schedule
- ✓ 400 °C, compact 3 L chamber — sized for TLD chips and small samples
- ✓ Horizontal forced-air circulation — even heating and cooling
- ✓ Configured to order — lead time on request; install & support included
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Carbolite Gero HTCR High-Temperature Clean Room Oven – 400–600°C | 28–1000 L
High-temperature clean room oven combining low-shedding clean-room construction with 400, 500 or 600 °C in five sizes from 28 to 1,000 L — enclosed brushless fan, particle-free seal, safe-touch double skin and standard over-temperature protection, with an ISO 14644 Class 5 option.
- ✓ Clean-room build at 400–600 °C — low-shedding insulation, enclosed brushless fan
- ✓ Five sizes, 28–1000 L — sixteen standard models
- ✓ ISO 14644 Class 5 option · over-temperature protection standard
- ✓ Configured to order — lead time on request; install & support included
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Carbolite Gero LGP Large General Purpose Industrial Oven – Up to 700°C | 500–13,820 L
Large-format industrial oven with the range's widest choice of size and temperature — 500 to 13,820 L in four grades (250, 425, 625 and 700 °C). Heavy-duty impellers, a 430-grade stainless interior, single/double doors and a 3216CC controller with over-temperature protection, plus AMS2750F (Nadcap)-ready builds.
- ✓ 500 to 13,820 L — the largest ovens in the range, single or double door
- ✓ Four temperature grades — 250, 425, 625 and 700 °C
- ✓ AMS2750F (Nadcap) builds, explosion relief and motorised doors available
- ✓ Configured to order — lead time on request; install & training included
On backorder
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Carbolite Gero GP General Purpose Industrial Oven – Up to 300°C | 220–450 L
General-purpose industrial oven to 300 °C in three sizes (220, 330, 450 L) with a choice of vertical (A) or horizontal (B) airflow, a 430-grade stainless-steel case and robust production-duty construction — with AMS2750F (Nadcap)-ready builds available.
- ✓ 300 °C production-grade oven — ±5 °C uniformity, vertical or horizontal airflow
- ✓ Three sizes — 220, 330 and 450 L
- ✓ AMS2750F (Nadcap)-compliant builds available for aerospace heat treatment
- ✓ Configured to order — lead time on request; install & support included
On backorder
· Lead time: configured to order — request current lead time. Install and support included.
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Carbolite Gero CR Clean Room Oven – Up to 250°C | 30–1810 L
Clean room oven to 250 °C in nine sizes from 30 to 1,810 L — fully sealed low-shedding insulation, enclosed brushless fan and a particle-free door seal keep the load clean, with an optional inert-atmosphere package and through-wall designs.
- ✓ 250 °C clean heating — low-shedding insulation, enclosed brushless fan, particle-free seal
- ✓ Nine sizes, 30–1810 L — bench chamber to floor-standing
- ✓ Inert-atmosphere, through-wall flange and over-temperature options
- ✓ Configured to order — lead time on request; install & support included
On backorder
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Carbolite Gero HTMA Controlled Atmosphere Oven – Up to 700°C | 28–1000 L
Controlled atmosphere oven for metal AM post-processing and materials research — 400–700°C max (4 grades), 28–1,000 L chambers (5 sizes), O₂ down to 50 ppm with N₂/Ar purge. Seam-welded gas-tight chamber built as an atmosphere unit from the ground up.
- ✓ O₂ down to 50 ppm — atmosphere-controlled heat treatment without vacuum-furnace cost
- ✓ 17 configurations in one family — 28 L lab to 1,000 L production, same gas architecture
- ✓ Seam-welded gas-tight chamber — purpose-built, not a retort-converted standard oven
- ✓ Configured to order — request lead time; install, training & cycle validation included
On backorder
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Carbolite Gero LHT High-Temperature Laboratory Oven – 400–600°C | 30–120 L
High-temperature laboratory oven in three grades — 400, 500 and 600 °C — and three bench sizes (30, 60, 120 L). A heavy-duty convection fan and low-thermal-mass insulation give fast, uniform heating, and the oven is rated for continuous operation.
- ✓ Three temperature grades — 400, 500 and 600 °C
- ✓ Three bench sizes — 30, 60 and 120 L, brushed stainless interior
- ✓ Rated for continuous operation — R38 PID control
- ✓ Configured to order — lead time on request; install & support included
On backorder
· Lead time: configured to order — request current lead time. Install and support included.From teams running Carbolite Gero ovens
Unedited feedback from labs and production floors.
★★★★★
Temperature uniformity held within spec across the whole chamber — our heat-treat sign-off stopped being a fight.
DR
Daniel R. Process Engineer · Aerospace
★★★★★
Configured to order meant the exact controller and over-temperature setup we needed, and install was handled end to end.
PS
Priya S. Lab Manager · Materials R&D
★★★★★
We use it for ageing and stress relief up to 600°C; ramp control and recovery are exactly what we needed.
MT
Marcus T. Metallurgist · Energy
Common questions
Don't see yours? Email [email protected] — NDA standard, typical reply within 4 hours.
What temperatures does the HT oven reach?
The Carbolite Gero HT is built in four maximum-temperature grades: HT4 (400°C), HT5 (500°C), HT6 (600°C) and HT7 (700°C). You choose the grade that matches your process. Temperature uniformity is ±5°C and minimum operating temperature is about ambient +60°C. It is an air-atmosphere oven — for oxidation-sensitive work that needs an inert atmosphere, the Carbolite Gero HTMA controlled-atmosphere oven is the better choice.
What chamber sizes are available?
The HT comes in four chamber sizes — 28, 95, 220 and 350 litres. The 400, 500 and 600°C grades are available in all four sizes; the 700°C grade (HT7) is offered in 28, 95 and 220 L. Perforated stainless-steel shelves are standard, and additional or heavy-duty reinforced shelves can be specified. Our applications engineer will help match the size to your load and throughput.
Can the HT be used to stress-relieve metal 3D printed parts?
Yes, for alloys and cycles that tolerate an air atmosphere. The HT reaches up to 700°C, which covers stress relief, ageing and tempering of many metals. However, oxidation-sensitive alloys such as titanium should be treated under inert gas — for those, the Carbolite Gero HTMA controlled-atmosphere oven holds oxygen down to 50 ppm. We run heat treatment in-house at AO Metal and will advise which oven suits your alloy.
What controller does the HT use and can I program cycles?
The HT ships with the Carbolite Gero 301 controller for single ramp to setpoint plus a process timer. For programmed multi-segment ramps, soaks, data logging and digital communications, a range of upgraded controllers and programmers can be specified at time of order. This matters for heat-treatment cycles that need controlled ramp and soak stages. We will help match the controller to your process.
Does the HT offer a stoving and curing option?
Yes. A stoving & curing option for extracting small volumes of volatile solvents is available; it increases the maximum power by 1500 W and is not compatible with the viewing-window option. This suits high-temperature curing of coatings and resins that release fumes. Over-temperature protection and heavy-duty reinforced base and shelves are also available. We will confirm the right option combination for your process.
Is over-temperature protection available?
Yes. Over-temperature protection is an option, recommended for unattended operation and for protecting valuable loads — it isolates the heating if the setpoint is exceeded. Given the HT reaches up to 700°C, we strongly recommend it for high-value or long-duration cycles. A viewing window is also available (though not together with the stoving & curing option). The applications engineer will advise which safety options suit your workflow.
What is the lead time and does Additive Plus install it?
The HT is configured to order, so lead time depends on the grade, size and options chosen — request a current quote and we will confirm it. Additive Plus handles US-based delivery and setup, provides operator guidance, and coordinates Carbolite Gero spares, service and calibration locally. Because we run heat treatment in-house at AO Metal, we can help validate a stress-relief or ageing cycle on your parts before the oven ships.
Place your order, or talk to an engineer first
Order Carbolite Gero HT High-Temperature Industrial Oven – 400–700°C | 28–350 L direct, or talk to materials engineer