It's worth checking whether the oven has an Energy Star rating before buying an appliance. They are a great indicator that the oven has been tested to ensure energy efficiency. Single wall ovens unlike freestanding models are mounted at eye-level and come with thoughtful features like a pyrolytic cleaning function. https://ovens-and-hobs16085.blogdanica.com/30791116/what-is-a-built-oven-single