You ask, what is a fireplace and what is a fireplace-heater?

Fireplace emits warmth only for a short while when the fire is burning, but a fireplace-heater stores the heat from the fire in its shell and releases it in the surrounding space over a longer period of time.
Fireplace-heater has a large glass door and the burning fire visible through it adds warmth and cosiness to every household.
Clay tile fireplace-heaters add character and warmth to every room.