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.
We just got a bus that went 10 miles in 2 years needless to say its in real bad shape 93 international Carpenter. As for southern & western climates id feel 14 to 17 years is a good life span for those buses. unless they sit for long periods of time..Wayne A legend of the past. think the age of a conventional (type C)school bus should be 14 years old before it is retired, and for a transit-style (type D) school bus, I think it should be 16 years old before it retires.