We talked to Bob Schiffmann, President of the International Microwave Power Institute for 18 years, who has worked with microwaves since the 1960s and consulted for frozen food companies. He told us that cheaper microwaves use cheaper components and end up costing more to fix than they’re worth. By digging through reviews and crunching some numbers, we found that the risk of buying an unreliable microwave doubles (at a minimum) once you go below that $100 mark. We didn’t consider anything under that price.
Microwave doors generally come with either push-to-open buttons or handles, and they open either to the right or to the left. We’re fans of the door handle version, which allows you greater control and is easier on the long-term fate of the door. However, when it comes to direction make sure you note if you need a right-opening microwave to fit your kitchen’s layout.
Another misconception is that microwave ovens cook food "from the inside out", meaning from the center of the entire mass of food outwards. This idea arises from heating behavior seen if an absorbent layer of water lies beneath a less absorbent drier layer at the surface of a food; in this case, the deposition of heat energy inside a food can exceed that on its surface. This can also occur if the inner layer has a lower heat capacity than the outer layer causing it to reach a higher temperature, or even if the inner layer is more thermally conductive than the outer layer making it feel hotter despite having a lower temperature. In most cases, however, with uniformly structured or reasonably homogenous food item, microwaves are absorbed in the outer layers of the item at a similar level to that of the inner layers. Depending on water content, the depth of initial heat deposition may be several centimetres or more with microwave ovens, in contrast to broiling/grilling (infrared) or convection heating—methods which deposit heat thinly at the food surface. Penetration depth of microwaves is dependent on food composition and the frequency, with lower microwave frequencies (longer wavelengths) penetrating further.[citation needed]
For an over the range microwave, you need the right kind of airflow for your setup, and you may need additional features like the ability to control oven range lights. Over the range units are specifically designed for these tasks, but they vary from model to model, so don’t get complacent when buying. Know what you need to keep your stove clear of smoke first!
Microwave ovens are a common kitchen appliance and are popular for reheating previously cooked foods and cooking a variety of foods. They are also useful for rapid heating of otherwise slowly prepared foodstuffs, which can easily burn or turn lumpy when cooked in conventional pans, such as hot butter, fats, chocolate or porridge. Unlike conventional ovens, microwave ovens usually do not directly brown or caramelize food, since they rarely attain the necessary temperatures to produce Maillard reactions. Exceptions occur in rare cases where the oven is used to heat frying-oil and other very oily items (such as bacon), which attain far higher temperatures than that of boiling water.