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- Configuration & install support we spec the temperature grade, clean-room rating and safety package to your process
- US-based service & spares Carbolite Gero calibration, parts and support handled locally
Furnances, Clean Room Ovens
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
Price held 7 days after order.
Install + training included
ISO 14644 Class 5 option
What your process engineer actually checks
What your process engineer actually checks
Clean heating at high temperature
The HTCR carries the CR's low-shedding sealed insulation, enclosed brushless fan and particle-free seal up to 400, 500 or 600°C. Double-skin construction keeps the outer case safe to touch, over-temperature protection is standard, and ISO 14644 Class 5 models are available.
An applications engineer on the line
Questions on cleanliness class, ISO 14644 rating or which grade and size fits your load? Our engineers run heat treatment in-house at AO Metal. Sub-4h reply, NDA standard.
400–600°C
Max temperature
28 – 1000 L
Chamber volumes
ISO Class 5
Clean option
301
Controller
About this product
The Carbolite Gero HTCR is a high-temperature clean room oven combining low-particulate clean-room construction with maximum temperatures of 400, 500 or 600°C, in five chamber sizes from 28 to 1,000 litres (sixteen standard models). Fully sealed low-thermal-mass insulation avoids shedding fibres, a fully enclosed brushless fan motor keeps the airstream clean, and a particle-free silicone door seal with a polished sealed stainless interior contains the chamber. Double-skin construction keeps the outer case safe to touch, over-temperature protection is standard, and ISO 14644 Class 5 models are optionally available for the most demanding cleanliness requirements.
Why engineers choose the HTCR
Clean-room construction that also runs hot — figures below are from the Carbolite Gero datasheet.
Clean, low-shedding at high heat
Fully sealed low-thermal-mass insulation, an enclosed brushless fan motor and a particle-free silicone seal keep the load clean — now at 400, 500 or 600°C, not just 250°C.
Five sizes, 28–1000 L
Sixteen standard models span 28, 95, 220, 510 and 1,000 L across three temperature grades — from a bench chamber to a floor-standing production unit.
ISO 14644 Class 5 option
Class 5 clean-room-rated models are optionally available where your process demands a formally classified environment.
Safe-touch build, over-temp standard
Double-skin construction keeps the outer case at a safe temperature, over-temperature protection is fitted as standard, and a 301 controller with door switch runs the cycle.
How Additive Plus delivers it
Configured to order, installed and supported by engineers who run heat treatment in-house.
Step 01
Configure to your process
Pick temperature grade (400–600°C), chamber size (28–1000 L), ISO Class 5 rating and options — through-wall flange, access port, cable entries, floor stand.
Step 02
Install & support
US-based delivery and setup, operator guidance, and Carbolite Gero spares and service handled locally.
Step 03
Dial in your cycle
We help set clean high-temperature cure, bake-out or heat-treatment temperatures and times for the contamination-sensitive parts you process.
Temperature grades & chamber volumes
| Model | Max temp | Available chamber volumes |
|---|---|---|
| HTCR4/x | 400°C | 28, 95, 220, 510, 1000 L |
| HTCR5/x | 500°C | 28, 95, 220, 510, 1000 L |
| HTCR6/x | 600°C | 28, 95, 220, 510, 1000 L |
Minimum operating temperature is approximately ambient +60°C. Full per-model dimensions, shelf loading, heat-up times and power ratings are in the Specifications tab.
Typical applications
Where a high-temperature clean room oven earns its place.
Aerospace composite cure
Clean high-temperature prepreg and bonded-part cure
Electronics & semiconductor
High-temperature bake-out in a clean chamber
Medical device processing
Clean high-temperature cure and heat treatment
Debind pre-heat & drying
Contamination-free debind and high-temp drying
Contamination-sensitive heat work
High-temperature processing where cleanliness matters
Not sure the HTCR is the right oven?
If you need lower temperature, a controlled inert atmosphere or non-clean high-temperature heat, a sibling Carbolite Gero oven may fit better.
Lower temp, cleanCR Clean Room OvenView oven →
Need inert atmosphereHTMA Atmosphere OvenView oven →
High temp, non-cleanHT Industrial OvenView oven →
Need inert atmosphereHTMA Atmosphere OvenView oven →
High temp, non-cleanHT Industrial OvenView oven →
Tell us your cleanliness class, part type and target temperature — and whether you need an ISO 14644 Class 5 build — and our applications engineer will confirm the right HTCR grade, size and options. Configurations are priced per specification.
Why source through Additive Plus
- AM & clean-process expertise — clean high-temperature cure, bake-out and heat-treatment schedules for contamination-sensitive parts, not just oven delivery.
- In-house heat treatment at AO Metal — we run post-processing daily and can advise on cycles for your parts.
- 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 | HTCR4, HTCR5, HTCR6 |
| Max temperature | 400 / 500 / 600°C |
| Chamber volumes | 28 / 95 / 220 / 510 / 1000 L |
| Temp uniformity | ±5.0°C |
| Min temperature | Ambient +60°C |
| Clean features | Sealed low-shedding insulation · enclosed brushless fan · particle-free seal · double-skin case |
| Clean option | ISO 14644 Class 5 models available |
| Controller | 301 · over-temperature protection standard |
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 HTCR High-Temperature Clean Room Oven – 400–600°C | 28–1000 L
Furnances
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.
Furnances
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
· Lead time: configured to order — request current lead time. Large-format install and training included.
Furnances
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
On backorder
· Lead time: configured to order — request current lead time. Install and support included.
Furnances
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
· Configured to order — request lead time
Furnances
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
· Lead time: configured to order — request current lead time. Install and support included.
Furnances
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.
Furnances
Carbolite Gero PF Fan Convection Laboratory Oven – Up to 300°C | 28–910 L
Fan-convection laboratory oven in six sizes from 28 to 910 L — 300 °C on PF 30–PF 200, 250 °C on the large PF 400/800, with ±5 °C uniformity, a stainless-steel chamber and options for solvent stoving, curing and moisture extraction.
- ✓ Fan convection to 300 °C — ±5 °C uniformity, rapid heat-up and recovery
- ✓ Six sizes, 28–910 L — bench-top to floor-standing
- ✓ Stoving & curing, moisture extraction and variable-speed fan options
- ✓ 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.
Furnances
Carbolite Gero AX Laboratory Oven – Fan Convection Up to 250°C | 28–128 L
Bench-top fan-convection laboratory oven — 250 °C max across three sizes (28, 66, 128 L), ±5 °C uniformity at 250 °C and a ~23-minute heat-up, with a chemically resistant stainless-steel chamber and R38 digital PID control.
- ✓ 250 °C fan-convection heating — ±5 °C uniformity, 23–26 min heat-up, 3 min recovery
- ✓ Three bench sizes — 28, 66 and 128 L, stackable to save space
- ✓ Chemically resistant stainless-steel liner — built to BS EN 61010-2-010
- ✓ 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
★★★★★
The clean chamber let us cure parts without the particulate contamination our old oven left behind. Big step up.
PS
Priya S. Cleanroom Manager · Medical devices
★★★★★
Configured to our Class 5 requirement and installed cleanly. Support has been responsive throughout.
MT
Marcus T. Facilities Engineer · Electronics
Common questions
Don't see yours? Email [email protected] — NDA standard, typical reply within 4 hours.
What makes the HTCR a clean room oven, and how hot does it get?
The Carbolite Gero HTCR combines clean-room construction with high temperature. Fully sealed low-thermal-mass insulation avoids shedding fibres, a fully enclosed brushless fan motor keeps the airstream clean, and a particle-free silicone seal with a polished sealed stainless interior contains the chamber. It is available in three grades — 400, 500 and 600°C — so you get clean-room cleanliness at temperatures a standard 250°C clean room oven cannot reach.
What chamber sizes and models are available?
There are sixteen standard HTCR models across five chamber sizes — 28, 95, 220, 510 and 1,000 litres — in 400, 500 and 600°C grades. Smaller units are bench or cabinet scale; the 510 and 1,000 L models are floor-standing. Perforated stainless-steel shelves are standard. Our applications engineer will help match the grade and size to your parts, batch volume and cleanliness requirement.
Is the HTCR ISO 14644 clean-room rated?
ISO 14644 Class 5 models are optionally available on the HTCR for processes that require a formally classified clean environment. The standard build already uses low-shedding sealed insulation, an enclosed brushless fan and a particle-free seal to minimise particulates. If your quality system calls for a specific classification, specify the Class 5 option at time of order and we will configure it accordingly.
Is over-temperature protection included?
Yes. On the HTCR, over-temperature protection is fitted as standard, recommended for protecting valuable contents and for unattended operation — it isolates the heating if the setpoint is exceeded. Double-skin construction also keeps the outer case at a safe temperature, and a door switch is standard. Given the oven reaches up to 600°C, these safety features matter for high-value or long-duration cycles.
Can the HTCR be built into a cleanroom wall?
Yes. Through-wall (flange-fitted) designs are available so the HTCR can be mounted in a cleanroom partition, and fully bespoke designs are offered. Additional options include an access port for an independent thermocouple, cable entry ports, lockable door and fixed or castor-mounted floor stands. Tell us your facility layout and cleanliness class and we will configure the oven to suit.
What is the difference between the HTCR and the CR clean room oven?
Both share clean-room construction — low-shedding insulation, enclosed brushless fan and particle-free seal. The CR reaches 250°C, while the HTCR is built for higher temperatures of 400, 500 or 600°C and adds double-skin safe-touch construction, standard over-temperature protection and an optional ISO 14644 Class 5 rating. Choose the CR for lower-temperature clean drying and curing, and the HTCR when you need clean processing above 250°C.
What is the lead time and does Additive Plus install it?
The HTCR is configured to order, so lead time depends on the grade, size, clean-room rating 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 advise on clean high-temperature cure and bake-out cycles for your parts.
Place your order, or talk to an engineer first
Order Carbolite Gero HTCR High-Temperature Clean Room Oven – 400–600°C | 28–1000 L direct, or talk to materials engineer