A 12 and 4 KW range oven is a stove top. This is for
cooking.
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Yes, an example is the KitchenAid 36-Inch Dual-Fuel Freestanding
Convection Oven Range.
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A really good place to find reviews on oven range hoods is
consumer reports. They have an online site and tell you all the
pros and cons on oven range hoods for the kitchen.
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the range oven
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Yes, if it is a standard gas range with built in oven then it
would normally be a conventional oven.