The Rumford Fireplace – An Early Modern Fireplace Design The Rumford Fireplace, invented in the late 18th century, was one of the most important innovations in fireplace technology at the time. Learn more about its history and how it works now! The History Of The Rumford Fireplace The Rumford Fireplace was first prototyped by Sir Benjamin Thompson, also known as the Count of Rumford. He was an American-born British physicist, who was very interested in studying heat and convection. He created this fireplace in the 1790s, by creating a shallow, small fireplace with widely-angled sides to reflect heat into the room more efficiently. The fireplace quickly became a sensation in London and spread throughout the world. How It Works Beyond its angled sides, the principal innovation of the Rumford Fireplace was the idea of restricting the chimney opening using bricks. This, in turn, resulted … Continued