The Ooni Fyra 12 manual explains how to assemble, light, fuel and cool down this wood pellet pizza oven safely. Its core rules are simple: use 100% hardwood pellets, light only with approved firelighters, and keep the oven outdoors at all times.
Follow the steps in order, keep the door on while cooking, and wait at least two hours before covering or storing the oven. The steps below follow the printed manual for model UU-P0AD00.
This article summarizes the printed manual and does not replace it. Read the full safety section of your own copy before the first fire.
What Is in the Ooni Fyra 12 Manual
The printed Ooni Fyra 12 manual for model UU-P0AD00 covers safety, assembly, lighting and cool-down with English on the first pages.
The English section is short enough to read before your first fire. It opens with a legal disclaimer and a safety list, then moves to the parts list and the assembly steps. Lighting and extinguishing instructions come after assembly, so read the whole English section in order. If you also own a Karu 12, our Ooni Karu 12 manual summary covers its wood and charcoal rules.
The parts list in the manual includes these components:
- Main body, door and chimney with chimney cap
- Cordierite stone baking board
- Fuel grate and fuel tray
- Fuel hopper and Flame Keeper
Check that every part is in the box before you start. The Ooni Fyra 12 manual asks for a complete assembly before use, so a missing piece is a reason to pause and not to improvise a substitute.
Safety Rules in the Ooni Fyra 12 Manual
The manual says the Fyra 12 is for outdoor use only, on a sturdy, level, non-flammable surface away from structures and never inside a building or garage.
Pellet ovens combine open fire, high heat and flying sparks, so the manual lists several rules that readers often skip. These are the points that matter most before you light the oven:
- Do not use it indoors, in a garage, a tent, a caravan, or on a boat or recreational vehicle.
- Do not use it in high or gusty winds, and do not use it as a heater.
- Flames can blow out of the back, from the front when the door opens, or from the top of the chimney.
- Only touch the wooden or plastic handles to open the door and lift the fuel hatch.
- Never leave it unattended while lit, and never leave the lid open while it burns.
Keep children, pets and combustible items away from the oven at all times. The Ooni Fyra 12 manual also says the oven remains hot after the visible flames have died down, so treat it as hot until it has cooled.
The Ooni Fyra 12 manual notes that the approximate operating temperature runs from 250°F (120°C) to 1000°F (550°C). For how those heat levels compare with other fuels, see wood pizza oven temperatures.
How to Assemble the Fyra 12 in Seven Steps
The Ooni Fyra 12 manual lists seven assembly steps, starting with unfolding the legs and ending with the door and chimney cap.
Assemble the oven before you add any fuel. Work through the steps in this order so each part sits in its place before the next one goes on:
- Unfold the legs.
- Assemble the fuel tray and fuel grate, then insert them.
- Insert the pizza stone.
- Insert the chimney and lock it in place.
- Add the fuel hopper.
- Add the Flame Keeper.
- Add the door and chimney cap.
The Ooni Fyra 12 manual says improper assembly, adjustment or maintenance can cause injury or property damage. That is why it asks you to use the oven only when it is completely assembled and every part is securely fastened and tightened.
Give the legs a final check before you move on. The manual asks the user to keep the oven level and stable, so a wobbling frame is a sign to stop and correct the setup before lighting.
How to Light the Fyra 12 With Hardwood Pellets
Remove the chimney cap, fill the grate with about 150 g of 100% hardwood pellets, and light a firelighter placed at the front of the grate.
The Ooni Fyra 12 manual gives five steps for lighting. Each one affects airflow, fire size or what you can see from outside the oven:
- Remove the chimney cap and make sure the chimney vent is open for optimum airflow.
- Remove the grate and fill it with 100% hardwood pellets, about 5 oz (150 g) or two handfuls to start.
- Place a fire-starter at the front of the grate, light it, and push the grate back into the oven. Avoid anything that may add unwanted flavour to your food.
- Let the starter pellets fully ignite, then look through the viewing hole in the door to check for full flame.
- Keep the door on throughout the cook, except when you add or remove food.
Use only firelighters that comply with EN 1860-3. The manual warns against using spirit or petrol for lighting or re-lighting, and it says to keep lighters and barbecue lighting fluid away from the oven.
The manual puts the flame check before the top-up in its order of steps. Let the starter pellets ignite fully and confirm the flame through the viewing hole first, then add pellets gradually.
Topping Up Pellets and Controlling Heat
Add pellets little and often until the hopper is full, because the manual says a full hopper lasts about 15 minutes. For fuel background, read how to use wood pellets in a pizza oven.
The Ooni Fyra 12 manual says to top up the hopper gradually and keep it near the top throughout the cook. It links this habit to consistently high temperatures during the cook.
- Add pellets gradually, because too many at once enlarge the fire.
- Keep the hopper topped up until it reaches the top, then maintain that level.
- Watch the flame through the viewing hole rather than guessing from the outside.
The Ooni Fyra 12 manual warns that adding too many pellets enlarges the fire, which risks damage to you or the oven. Smaller, frequent additions are the approach the manual describes.
Do not cook until the fuel has a coating of ash. The manual lists that warning among its operating rules, so treat it as a clear signal to wait rather than a suggestion.
First Use: What the Manual Says About Burn-In
The printed Ooni Fyra 12 manual gives no separate seasoning cycle, so the first fire follows the same lighting steps as every later cook.
The English section of the manual does not list a separate burn-in or seasoning routine for the Fyra 12. A seasoning temperature or time could not be confirmed from the manual or the Ooni pages reviewed for this article, so none is given here.
For first use, assemble the oven fully, set it up outdoors on a stable, non-flammable surface, and light it with the steps above. Ooni publishes support articles in its help centre, so check there for any updated first-use advice before you cook.
Shutting Down and Cooling the Oven Safely
Let the fire burn down naturally, leave the oven to cool, and wait at least two hours before covering or storing it.
The Ooni Fyra 12 manual says to let the fire burn down on its own and not to add more fuel to end the cook. The oven stays hot after the flames die down, so the manual sets a minimum cool-down of 2 hours after use.
- Leave the oven alone while it cools, and do not remove the ash until it has cooled completely.
- Do not cover the oven straight after use.
- Make sure all fire and glowing embers have gone from the burner before you store it.
Ash removal is the step most people rush. Wait until the oven is fully cool, because the manual ties ash removal to a cool oven, not a warm one. Questions about leaving it out between cooks are covered in can you leave a pizza oven outside.
Frequently Asked Questions
Can I light the Ooni Fyra 12 with lighter fluid?
No. The Ooni Fyra 12 manual warns not to use spirit or petrol for lighting or re-lighting. Use only firelighters that comply with EN 1860-3, placed at the front of the grate, and keep lighters and barbecue lighting fluid away from the oven.
What fuel does the Ooni Fyra 12 use?
The Ooni Fyra 12 manual specifies 100% hardwood pellets. To start, it recommends about 5 oz (150 g), or two handfuls, of pellets in the grate. After that, add pellets gradually to the hopper and keep it near the top during the cook.
How long does a full hopper last?
According to the manual, a hopper full of pellets lasts about 15 minutes. Top up little and often to keep the level steady during a cook, because adding too many pellets at once enlarges the fire and can damage you or the oven.
How long should the Fyra 12 cool before storage?
The Ooni Fyra 12 manual says to allow a minimum of 2 hours after use. Do not cover the oven straight after cooking, and make sure all fire and glowing embers have gone from the burner before you store it.
Can I use the Ooni Fyra 12 indoors or in a garage?
No. The Ooni Fyra 12 manual says the oven is for outdoor use only and must never be used in a building, a garage or any enclosed area. It also says not to use it on boats or recreational vehicles.
Does the Ooni Fyra 12 need seasoning before the first cook?
The printed Ooni Fyra 12 manual does not list a seasoning routine. No seasoning figure is given here because none could be confirmed, so follow the lighting steps, light only with approved firelighters, and check Ooni’s help centre for updates.
Keep the manual with the oven and read its safety section before the first fire. Its rules on outdoor use, wind and attendance apply to every cook, not only the first one. Wait for full cool-down before you clean out ash or store the oven, and never leave it lit and unattended. If you are comparing wood-fired models, see the Ooni Karu 2 size guide and the oven model guides.