Forecast issued at 4:30 pm EDT on Saturday 14 December 2024. Cloudy. Light winds becoming easterly 15 to 20 km/h in the early afternoon then becoming light in the late evening.
That system has been called a "Hypocaust". This system used hot air to provide heat under the floor. If we think of a flue for a chimney today and run it horizontal rather than vertical the warm air ...