floor furnace

American  

noun

1. a small self-contained furnace placed just below the floor of the space to be heated.

---

Etymology

Origin of floor furnace

First recorded in 1950–55

Example Sentences

In my old family house in Flagstaff, Ariz., alone, with heavy snow falling outside, the old floor furnace crackling and the makings of roast-beef sandwiches in the refrigerator.

From New York Times • Nov. 18, 2021