Insulation jacket for a baking oven

A baking oven comprising:

• an oven muffle having an exterior surface and defining an interior cavity adapted to receive articles to be heated therein;
• a unitary-formed insulation jacket having a top wall, a bottom wall, opposing side walls and a rear wall that are substantially continuous with each other and are free of joints therebetween;
• wherein said top, bottom, side and rear walls define and surround an interior cavity that is complementary shaped and sized to receive the oven muffle therein;
• a housing that defines an interior cavity therein;
• said interior cavity of the housing being complementary shaped and sized to receive the insulation jacket therein;
• and
• a door affixed to one of the muffle and housing to selectively close off access to the interior cavity of the oven muffle.

A method of insulating an exterior surface of a baking oven muffle, said method comprising the steps of:

• forming a unitary insulation jacket having a top wall, a bottom wall, opposing side walls and a rear wall that surround and define an interior cavity therein;
• wherein the top, bottom, side and rear walls are substantially continuous with each other and free of joints;
• and wherein the interior cavity is sized to receive the baking oven muffle therein;
• slidingly engaging the insulation jacket over an external surface of the baking oven muffle such that the top, bottom, sides and rear wall of the jacket are aligned with a top wall, bottom wall, side walls and rear wall of the backing oven muffle.