>> With a slider cracked, that should be enough don't ya think? 2/4/2009 <<

Probably. I have friends that swear by them and keep them on all night. I
just know that I wouldn't. I actually have one. I use it to take the chill
out of the van before getting into it. I also use it in the outside drive
away tent too sometimes but I never leave in on unattended.

Bryan