Our sources all agreed that in double wall ovens, both ovens are identical (give or take some specialty cooking modes) and will each perform just as well as they would in a single-oven unit.
Double wall ovens, in particular ... “[A] range combines an oven and cooktop into one unit, and the slide-in version slides into a cabinet that matches your kitchen cabinetry,” Lewis agrees.
That includes high-powered cooktops that will bring water for pasta to a rapid boil and double ovens that let ... required of a conventional electric wall oven set to 350° F.
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