It sounds like the story is describing a large kitchen rack or appliance that resembles an oven in size, found in a newly moved-into home. Based on that description, a few possibilities come to mind:
- Baking or cooling rack – commercial-size racks used in bakeries, often as tall as an oven and designed to hold multiple trays.
- Dish drying rack – larger, free-standing versions can be oven-sized, though less common.
- Wine or beverage rack – sometimes large, multi-level racks can occupy that much space.
- Old-style kitchen appliance – like a warming oven or bread proofing rack, which can be similar in size to a standard oven.
If the story hints at something unusual, it’s likely a commercial or vintage kitchen item that isn’t typically found in a regular home.
If you want, I can narrow it down to the most likely explanation based on common “new house surprises”” that match an oven-sized rack. Do you want me to do that?