Ooni Karu 12 FAQ

TABLE OF CONTENTS

SETTING UP

How do I set up and light my Ooni Karu 12?

To set up your Ooni Karu 12, you’ll need to follow a few simple steps:

1. Unpack your oven, unfold the legs, insert the stone and attach the chimney, fuel tray, and door.

2. Place your oven on an outdoor surface made of stone, metal, or wood. Tables made of glass or plastic are not recommended. Never use your oven indoors.

3. Allow your oven 3 feet/1 meter of clearance on all sides and 9 feet/3 meters above.

4. Gather your pizza peel, dough and toppings - your oven will be fully preheated in 15 minutes!

If working with solid fuels (wood and/or charcoal):

1. Remove the chimney cap. 

2. Open your chimney baffle and ensure the oven door is in place.

3. Place a layer of charcoal into the fuel tray through the hatch door. 

4. Add 4-5 pieces of wood. 

5. Ignite the wood/charcoal using either a gas blowtorch or matches and Ooni Premium Natural Firestarters.

If working with gas:

1. Connect the burner per manual instructions, removing fuel trays, grates, chimneys, and doors as needed

2. Connect the regulator and hose to your propane tank. This will either be a push-on fitting or a threaded fitting, depending on your region.

3. Open up the gas from your propane tank.

4. Find the control knob on the back of the gas burner. Push in and slowly turn the control knob counterclockwise until you hear a click and the burner ignites. 

5. Continue to push in the control knob for 5 seconds after ignition, then release.

*Ooni Gas Burner and Ooni Karu 12 Gas Burner should run quietly when lit. If you hear a roaring noise from the gas burner, switch the gas off for 5 minutes, then re-light.

When using your oven for the first time, let it run at high temperature (750°F/400°C) for 30 minutes, then cool it down completely to season the oven and ready it for use.

What should I do before I start cooking in my Ooni Karu 12?

Fire your empty Ooni Karu 12 at a high temperature (750°F/400°C) for 30 minutes. Allow it to cool fully and wipe down the inside with a dry paper towel. After this 'seasoning' process, your oven will be ready to cook great pizza.

Where can I use and store my Ooni Karu 12?

Ooni Karu 12 is designed for outdoor use only. Burning solid fuels indoors can cause carbon monoxide to build up to dangerous levels.

You must also leave 3 feet/1 meter of clearance on all sides of your oven and 9 feet/3 meters of clearance above your oven. This means Ooni Karu 12 will not be suitable for use on most balconies.

When your oven is not in use, use an Ooni Karu 12 Carry Cover to keep it safe from the elements. For occasions where the weather is stronger than usual, such as periods of heavy snow or rain, or extended exposure to sea breeze, bring your oven indoors to protect it.

How hot and smoky will my Ooni Karu 12 get?

Your oven will be hot to the touch, so please exercise some caution. The legs of your oven will not transfer this heat, which will keep your wooden, stone or metal surface safe. There are also cool touchpoints on the oven. Handles for the door and fuel hatch will stay cool throughout the cooking process.

When cooking with wood and charcoal:When cooking with gas:
  • You can expect some smoke throughout the cooking process, especially as your oven is near the peak of the heating process. 
  • Once your oven has reached high temperatures, your oven will burn cleanly
  • You should not see much smoke when working with propane; this fuel typically burns very cleanly.
  • If you do see smoke while using propane then you can contact us at support.ooni.com.

FUEL

How much fuel will my Karu 12 use?

Fuel Type

Consumption

Solid fuels (wood/charcoal)

3.3lb/1.5kg per 10 pizzas

Gas

0.74lb/0.34kg per hour

What kind of wood and charcoal do I need to use with my Ooni Karu 12?

A combination of wood and charcoal will give you the best results in your Ooni Karu 12. Always use lumpwood charcoal and kiln-dried hardwoods. 

Beech, birch, oak, hickory, mesquite, apple, and cherry are all readily available hardwood fuel options, though this is not a definitive list.

The photo below shows  a good example of the wood size to use in your Ooni Karu 12:

If you are based in the UK or the EU, you can order our Ooni Premium Hardwood Oak Logs here and here. If you are in the US, you can order our Ooni Premium Hardwood Oak Logs here.

Does the Ooni Karu 12 work with wood pellets?

Ooni Karu 12 is designed for use with gas or hardwood kindling and lumpwood charcoal. Pellets are not suitable for this fuel tray and will prevent your oven from getting up to temperature. 

What kind of gas tank and regulator do I need to use with my Ooni Gas Burner or Ooni Karu 12 Gas Burner?

Your Ooni Gas Burner or Ooni Karu 12 Gas Burner will come with a regulator and work with a standard propane tank.

These will vary across regions.

If you are ordering a 30mBar burner, you will need to purchase your own region-specific gas hose and regulator.

Please see the charts below for more information.

Suitable Gas Tanks

Not Suitable Gas Tanks

20lb / 3.9-13kg propane tanks

Natural gas

1lb/440g propane tanks*

*with purchase of adaptor(US/CA) or suitable regulator (UK/EU)

Home propane hook-ups 

Propane tanks larger than 30lb/13kg

Region

Regulator

Tank

Canada, USA

28mBar

Bulgaria, Croatia, Cyprus, Denmark, Estonia, Finland, Hungary, Iceland, Italy, Lithuania, Netherlands, Norway, Romania, Slovakia, Slovenia, Sweden, Turkey

30mBar

A 30mBar regulator will not come with your gas burner. 


The range of 30mBar regulators is vast, and it is currently best for you to choose the regulator most suitable for use with the gas tanks available to you. 

Region Specific

Belgium, Cyprus, Czech Republic, France, Great Britain, Greece, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Portugal, Slovakia, Slovenia, Spain, Switzerland

37mBar

“Patio Gas” = propane

*If using propane tanks like the red ones in this photo, please see below for further instructions

Austria, Germany, Slovakia, Switzerland

50 mBar

If you have a 37mBar oven and you’re using a propane tank that looks like the red tanks in the chart above, you will need to purchase a POL regulator. It will look something like this. Once you have the new regulator, watch this instructional video and follow the instructions below:

1. Loosen the jubilee clips, which look like this:

2. Soften up the edge of the hose by warming it with a hair dryer or dipping the hose in hot water for 10 seconds.

3. Once you have softened the hose, pull the regulator off.

4. Replace the Ooni-provided regulator with the POL regulator.

5. Replace the jubilee clips and tighten them so there is an airtight seal around the hose and valve.

6. Do a leak test with liquid soap and water: Put some soapy water on the connection points of the hose, turn the gas on and see if any bubbles are created. If you see bubbles, you’ve got a leak. 

  • If there are bubbles, go back and tighten the seals around the hose.
  • If there are no bubbles, you’re ready to make some pizza!

Can I use butane or natural gas?

Ooni Karu 12 cannot be used with natural gas. If you’re interested in a natural gas option, Ooni Karu 16 can use natural gas with the addition of the Ooni Karu 16 Natural Gas Burner

Ooni Karu 12 has been certified for use with propane, butane and LPG gas, which is a mix of both. Propane and butane are very similar, but burn slightly differently. Please note that butane will produce a somewhat sootier flame.

  • In the US/CA, we recommend using propane only. 
  • In the UK and EU, the regulator you’ll need for butane will depend on your oven, as outlined in the chart below.

Oven Type

Butane Regulator Needed

37mBar Ooni Gas Burner

28-30mBar butane-compatible regulator

30mBar Ooni Gas Burner

28-30mBar butane-compatible regulator 

50mBar Ooni Gas Burner

Not certified for use with butane

What safety devices are built into Ooni gas-fired products?

Your Ooni Gas Burner or Ooni Karu 12 Gas Burner includes a Flame Safety Device (FSD). This device ensures your gas burner will not continue releasing gas if the temperature of the oven suggests there is no flame. This was designed and implemented to make your oven as safe as it is fun. 

If your gas burner appears to cut out when a flame is present, please contact us at support.ooni.com

What should my flames look like?

Once ignited, you can expect the color of the flame in your oven to range anywhere between yellow and blue. Your flames should look something like those in the below photos:

What should I do if I’m having trouble lighting my Ooni Gas Burner (compatible with both Ooni 3 and Ooni Karu 12)

The following video has a step-by-step guide for firing up and getting the best results from your Ooni Gas Burner:

First, double check that your gas burner is installed correctly:

1. Assemble and install your gas burner so the logo is facing upward.

2. Remove the chimney and place the chimney cap in the space where the chimney was attached. 

3. Make sure to keep the door off while working with gas.

Then, walk through the following steps before trying to light your burner again:

1. Ensure that your Ooni Gas Burner is in the "off" position.

2. Disconnect your regulator from the propane tank for 5 minutes.

3. Check that the connections between regulator and tank are clean and free of debris. 

4. Remove any kinks or bends in the hose. 

5. Secure the connections between your regulator, hose and propane tank. 

6. Use a leak detector spray to check for any gas leaks. 

7. Keep your propane tank upright: If it’s resting on its side, gas will not flow properly.

If those steps do not help, service your gas burner:

1. Clean the thermocouple at the front of your gas burner:

2. Hand-tighten the FSD bolt, then give it an additional quarter turn with a wrench.

3. Open the gas flow on the propane tank very slowly. If there is a sudden rush through the regulator, it may trigger a safety valve and prevent the gas from flowing properly. 

4. When lighting your gas burner, push in and, very slowly, turn counterclockwise. This should take 5 seconds, which will give the gas time to flow into the burner. 

5. After you hear the *click* of ignition, continue to press the control knob in for 5 more seconds.

If you can hear gas flowing, but there is no spark of ignition, follow these steps:

1. Remove your gas burner and adjust the piezo (the ignition tip highlighted in the picture below) so it is 3mm away from the point of ignition.

2. Make sure it is not directly over a flame output hole, but instead rests over a metal part of the burner. You should now see a spark when you turn the control knob.

If you do not see a blue spark, use your matchstick holder to fire up:

1. Light your gas burner using a match and the supplied matchstick holder. 

2. Turn the gas on and light through the front of the oven by inserting a lit match onto the matchstick holder until the burner catches.

Other helpful tips:

  • Use compressed air to remove any debris from the inside of your gas burner.
  • If you hear a loud roaring sound, switch off your gas burner for 5 minutes. 
  • Do not fire your gas burner in high winds.
  • Keep your gas burner stored indoors when not in use.

What should I do if I’m having trouble lighting my Ooni Karu 12 Gas Burner?

First, double check that your gas burner is installed correctly:

1. Assemble and install your gas burner so the logo is facing upward

2. Remove the door and fuel tray and ensure the chimney baffle is open

3: The door can remain on when using the Ooni Karu 12 Gas Burner. 

Then, walk through the following steps before trying to light your burner again

1. Ensure that your Ooni Gas Burner is in the "off" position.

2. Disconnect your regulator from the propane tank for 5 minutes.

3. Check that the connections between regulator and tank are clean and free of debris. 

4. Secure the connections between your regulator, hose and propane tank. Use a leak detector spray to check for any gas leaks. 

5. Remove any kinks or bends in the hose. 

6. Keep your propane tank upright: If it is resting on its side, gas will not flow properly.

Other helpful tips: 

  • Use compressed air to remove any debris from the inside of your gas burner. 
  • If you hear a loud roaring sound, switch off your gas burner for 5 minutes before relighting. 
  • Do not fire your gas burner in high winds.
  • Keep your gas burner stored indoors when not in use.
  • If these tips do not help, please get in touch with us at support.ooni.com.

CARE

How do I clean my Ooni Karu 12?

How to clean the outside of your oven:

1. Let the oven cool down completely. 

2. Wipe off soot and dirt using dry paper towels.

3. If you’ve got tougher stains, Bar Keepers Friend or Weiman’s Stainless Steel Cleaner and Polish are great ways to clean the stainless steel parts of your Ooni. If you can’t find these particular products, just be sure to use a clean towel and non-abrasive cleaner.

How to clean the inside of your oven:

1. Let the oven cool down completely. 

2. If you’ve used solid fuels, dispose of cooled ashes in a fire pit, compost pile or any other environmentally-friendly waste disposal option available to you.

3. Use a stiff wire brush to clear excess soot from the fuel tray and grate so the perforations are free of debris. This will help with airflow for your next cook. 

4. To clean soot from the pizza door and chimney, use a dry paper towel. Avoid using water to clean the inside of the oven.

How to clean your baking stone:

1. Let the oven cool down completely 

2. Scrape off stubborn bits of food or debris using a pizza brush. 

3. Flip your stone over and reinsert it for the next cook. The heat from the oven should be enough to burn off any remaining residue while you’re making pizzas.

Don’t worry about the stone changing color; that’s completely normal and is the sign of a well-loved Ooni Karu 12!

How long does it take for my Ooni Karu 12 to cool down?

Leave Ooni Karu 12 to cool for a minimum of one hour before attempting to touch, move, or store it.

MANUAL AND ESSENTIALS GUIDE

Ooni Karu 12 Essentials Guide

Ooni Karu 12 Manual & Safety Instructions

Ooni Karu 12 Dimensions & Blueprint

Ooni Gas Burner Essentials Guide 

Ooni Gas Burner Manual: Manual 28mBar, Manual: 30mBar, Manual: 37mBar, Manual: 50mBar

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