Using BlueHeat® to warm your interior and engine is the smarter alternative to idling your vehicle for several reasons:

Idling wastes fuel (more)
Idling creates unecessary harmful emissions (more)
Idling begins with a "cold start" (more)
Idling may be illegal in your area (more)
Massachusetts idling laws (more)
Denver idling laws (more)
Why Idlling is bad (more)