Dark stains on a wall above a household heat radiator

---

Size: 3648px × 5472px
Photo credit: © Starring Lab / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: air, airflow, black, burn, calor, chaleur, conveccion, convection, convectors, convezione, dark, de, dirty, exchangers, flow, heat, heater, heaters, heating, home, house, marks, radiator, radiators, science, smudge, spot, stains, thermal, thermic, wall, white