With a shorter length than a double oven, single ovens are able to fit in tight spaces and fit easily under counters. They usually have electric elements in the top and the bottom of the oven for zoned heating. This allows for a more precise browning and cooking of dishes. https://ovensandhobsuk05573.targetblogs.com/31212314/can-a-built-in-single-gas-oven-and-grill-be-installed-in-your-kitchen