Before fitting any baffle plate, you will need to ensure that you remove the firebricks or cast-iron liners (depending on model) that surround the inside of the firebox. Bay Window: The baffle plate must be turned lengthways and placed into the woodheaters firebox opening. Ensure that the baffle folds are facing upwards. Once the baffle plate is inside the firebox, the plate needs to be angled upwards towards the r/h internal top of the firebox. When doing this, ensure you clear the baffle locator pins at the rear of the firebox. This will allow the front part of the baffle plate to clear the l/h lower front firebox opening. Now you can turn the baffle plate to its correct (horizontal) orientation. Tilt the r/h side and angle it to the inner roof of the firebox above the baffle locator pins. Repeat this for the l/h side and lower the baffle onto the locators. The baffle plate should now be in the correct position. Flat Window: Lift the baffle plate so it is horizontal inside of the firebox, with the lip at the front of the baffle plate facing upwards. Lower the rear of the baffle to bottom of the firebox. Lift the front of the baffle upwards and towards the front of the firebox, allowing the rear of the baffle to clear the locator pins at the upper-rear of the firebox. Lower the baffle onto the locators. If done correctly, the rear lip should be hooked in behind the locator pins, and the front of the baffle plate will be resting on the ledge above the firebox opening.