Is the fuel considered to affect the [taste of the] bread: Pesachim 26b, 27a-b
A New Oven fired with Fruit of a Tree's First 3 Years or Grafted/Mixed Species grown in a Vineyard: Pesachim 26b
Above case, where the oven was then used to bake bread: Pesachim 26b
Above, where the prohibited item was in Coal form: Pesachim 26b
A New oven fired with wood of a Tree of Idolatry: Pesachim 27a
Above case, where the oven was then used to bake bread: Pesachim 27a
Above, where the prohibited item was in Dying Coal or Live Coal form, or a live flame: Pesachim 27a-b
An Oven lit with a Sanctified Item: Pesachim 27b
