Best Answer: BTU is an old fahioned term British Thermal Units and was used to calculate the amount of energy required to raise the temp of a room by a degree (using Therms as a unit here too), and is uses an energy calculation rather than a straight how much air does it push sort of calculation.est Answer: BTU is an old fahioned term British Thermal Units and was used to calculate the amount of energy required to raise the temp of a room by a degree (using Therms as a unit here too), and is uses an energy calculation rather than a straight how much air does it push sort of calculation.
Buses that primarily operate service within the city, but are not limited to this area. Local bus service varies depending on the route, but many run seven days a week and nearly 24 hours a day.
The new Philadelphia Transportation Company (PTC) took over its operation on January 1, 1940. In the 1950s, National City Lines took over management of the PTC and began converting streetcar lines to bus routes. SEPTA, created in 1962, bought and took over PTC transit operations on September 30, 1968.After the purchase of the Red Arrow Lines on January 29, 1970, SEPTA designated the city services as its City Transit Division.oday, these bus or trackless trolley routes were once operated as streetcar lines: Routes 2, 3, 5, 6, 7, 12, 17, 23, 25, 26, 29, 30, 31, 33, 37, 38, 39, 40, 42, 43, 46, 47, 48, 52 (formerly streetcar Route 70), 53, 54, 55, 56, 57, 59, 60, 61, 64, 66, 73, 75 and 79.