Reply to post: ... start your vehicle and warm it up from inside the house on a cold day...

... start your vehicle and warm it up from inside the house on a cold day...

Not if you are in the UK (and don't have a garage) you can't:

"You MUST NOT leave a parked vehicle unattended with the engine running or leave a vehicle engine running unnecessarily while that vehicle is stationary on a public road."

http://www.highwaycode.info/rule/123

I imagine many potentially helpful (and therefor potentially dangerous) actions may have troubles somewhere in the world for somebody, so the whole approach may require "legal-region" localised APIs or the like.