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Rational Rational CombiMaster 20 Grid 1/1 GN (Gas Combination Oven)

Product Code: CM201G
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The CombiMaster range from rational with a wide range of features & usability options. The CombiMaster ovens come with one of the largest customisation option ranges there is enabling you to create your perfect oven which is suited to your exact needs. A hot-air steamer conforming to DIN 18866 for most of the cooking methods used in commercial kitchens for the optional use of steam & hot air individually in succession or in combination. Complete with 5 programmable air speeds, 100 cooking programs each with up to 6 steps & an internal probe for accurate core temperature measurement.

The useful mode selector control enables for simple operation with separate controls for temperature, core temperature & time settings. Each making this unit seamless to use with simple operation controls.

This product comes with some very unique & useful features, such as a special designed USB interface making this unit even easier to operate. Integral, maintenance-free grease extraction system with no additional grease filter as well as a seamless hygienic cooking cabinet with rounded corners, cabinet with splash guard which stops water from spilling out enabling you maintain your machine easier & provides a useful health and safety benefit.

Further Features:

  • Cool-down function for fast cabinet fan cooling
  • High-performance fresh steam generator
  • Automatic, active rinsing and drainage of steam generator by pump
  • Automatic adaptation to the installation location (height, climate, etc.)
  • Unit door with rear-ventilated double-glass panel and hinged inner panel
  • Mobile oven rack (rail spacing 2 1/2" / 63 mm) with tandem castors, wheel diameter 5" / 125 mm)
  • Handle mount for mobile oven rack
  • Cooking cabinet door with integral sealing mechanism
  • Material inside and out 304 (DIN 1.4301) stainless steel
  • Hand shower with automatic retracting system
  • Separate solenoid valves for normal and softened water
  • Fixed waste water connection conforming to SVGW requirements where permitted
  • Splash and hose-proof to IPX 5
  • Demand-related energy supply
  • Lengthwise loading for 18”x26” or 2/1, 1/1 GN accessories
  • Temperature unit is selectable in °C or °F
  • Height-adjustable feet
  • Dynamic air mixing

Operation & safety

  • Mode selector control for cooking modes, separate controls for temperature, core temperature and time settings
  • LED illuminated display, visible from a distance
  • Clear control panel
  • Manual cleaning program
  • Diagnostic system with automatic service notices displayed
  • Menu-guided user descaling program

Gas & electric versions are also available of each model.

Marine & Prison versions available of each model

Rational Oven Options:

Left Stop for Appliance Door - The appliance door can be ordered to a left stop rather than right, making the appliance easier to use in some establishments.

Mobile Oven Rack Package - The internal hanging racks are replaceable with a mobile oven rack - makes unloading your rational appliance simple & comfortable.

Connecting to energy optimization systems - For connecting to energy optimization systems & operating control systems.

Rack Signalling - In iLC mode, the LED lighting indicates which rack can be loaded or unloaded.

Safety Door Lock - The safety door lock protects against injury from hot steam.

3 Externally attachable core temperature probes - With the 3 core temperature probe & iLevelControl option, you can prepare different foods at the same time. (For appliances with right hand doors only)

Sous-vide core temperature probe (Externally attached) for vacuum cooking - The extremely thin & elastic sous-vide core temperature probe is used for cooking with vacuum sealed bags. The vacuum is not destroyed by inserting the probe. (For appliances with right hand doors only)

Externally attachable core temperature probe - The core temperature probe can be attached to the outside of the appliance if required using a connecting socket. (For appliances with right hand doors only)

Integrated fat drain - Any drops of grease are reliably caught in the cooking cabinet & diverted to special grease drip containers.

Prison Version - Protects the Rational appliance against deliberate damage or vandalism. Also prevents it being misused to perpetrate violence against other people. (For appliances with right hand doors only)

Lockable control panel - The control panel is protected with a robust & durable lockable door. (For appliances with right hand doors only)

Marine Version (For electrical appliances only) - Suitable for passenger ships & marine applications. Keeps the operator safe while maintaining functionality - even in rough seas. 

Mobile Appliances - Special frame with 4 stainless steel castors & parking brake for mobile uses.

Ethernet Port - Enables you to incorporate the rational appliance into a network. Appliance link is also possible with an appliance remote control & monitoring from iPhone/iPad using the Rational Remote App.


Model Options:

UltraVent Condensation Hood - The condensation technology in UltraVent absorbs & dissipates steam. Simple installation & can be retrofitted at any time. - W: 854mm | D: 1,226mm | H: 450mm

  • Model 201 Electric - 60.72.326
  • Model 202 Electric - 60.74.067

UltraVent Plus Condensation Hood - In addition to the UltraVent technology, UltraVent Plus is equipped with special filters. This prevents both vapours & the lingering smoke that builds while grilling & roasting. - W: 854mm | D: 1,226mm | H: 628mm

  • Model 201 Electric - 60.72.205

Mobile Oven Racks:

Match perfectly with Rational Appliances & are manufactured with the highest quality stainless steel whilst meeting the highest requirements. Ergonomic design for fast loading & use.

Mobile Plate Rack - The Mobile Plate Rack allows you to complete up to 120 finished plates (up to 31cm diameter) 

  • Model 201 - 60 Plates - 60.21.099
  • Model 201 - 50 Plates - 60.21.104
  • Model 202 - 84 Plates - 60.22.182
  • Model 202 - 100 Plates - 60.22.109
  • Model 202 - 120 Plates - 60.22.108

Mobile Oven Rack - For fast & comfortable loading & unloading of the Rational appliance. Can only be used in conjunction with the run-in rail.

  • Standard - 60.21.099
  • 15 Racks - 60.21.156
  • 16 Racks - 60.21.172
  • 17 Racks - 60.21.174
  • Bakery Stand - 60.21.222

Fat Drain Kit for Mobile Oven Rack - Only for use in conjunction with option integrated fat drain.

  • Model 201 - 60.73.040
  • Model 202 - 60.73.041


Other Accessories:

Many different accessories are available further imcreasing customisation options.

Handle Mount for Mobile Oven Rack - The handle of the mobile oven rack is in a fixed position & is well within reach

  • Models 201 and 202 - 60.72.378

Flow Guard with Silencer - For extracting the exhaust gases via a pipe (180mm diameter).

  • Model 201 - 70.00.770
  • Model 202 - 70.00.771

Entry Ramp - The entry ramp can compensate for inclinations (up to 3%) on the kitchen floor.

  • Model 201 - 60.21.080
  • Model 202 - 60.22.181

Appliance Height Extension - Increases ground clearance underneath your rational unit. (Max. 70mm)

  • Models 201 and 202 - 60.70.407

Mobile Oven Rack Height Extension - Only in conjunction with an apliance height extension.

  • Models 201 - 60.21.184
  • Models 202 - 60.22.184

This product has not been reviewed yet.


Minimum order total is now €150.00.

All orders over €200 Ex VAT are free from delivery charges. Delivery is €15 Ex VAT for orders under €200 Ex VAT.  We offer a 10 working day delivery on stock items. Any items that are not standard stock items may take up to 28 days to arrive. An estimated delivery date will be displayed at the checkout and is dependent on the items ordered. In some rare circumstances, there may be an increased delay but we endeavor to inform you as soon as possible on the product page or by email. If you have a query regarding stock, please call before placing your order.

We are currently not dispatching to Europe and Worldwide, due to Customs regulations.




Orders can be cancelled anytime until the order has been dispatched. You can cancel your order by contacting us through email or phone.


At BuyCatering we want you to be happy with your new purchase, if you are not completely satisfied with your purchase, under Distance Selling Regulations you have 14 days to return the items in a saleable and unused state. Contact our returns department on 1800 930 222 who will then authorise a return where goods will be inspected. We will then offer a refund or alternative item. Returns notified after 14 days will not be accepted unless under extreme circumstance and will be subject to a 25% restocking charge. Customers are responsible for the return carriage costs unless the product is faulty.