Hi Gary,
I was at "The Coleman Store" a year or so ago, and noticed warmer packs
that you simply tear open and they heat up. On impulse, I bought a
dozen, and boy do they work good. One .99 pack will heat like heck for
6-7 hours. The store also has propane powered catalytic "golf cart"
heaters. This worked well for my bridge as they are designed to mount to
a cup holder. (I have reverse cycle H&AC in the cabin) Last winter, the
few cold days we had were made quite comfortable by the little unit.

I would not consider its use in an unvented cabin or near fuel system
components.

Regards,

Capt. Frank Hopkins
http://www.home.earthlink.net/~aartworks

Gary Warner wrote:

Ok, after a quick search on the web I find I'm probably *way* behind on
knowing
about these. but anyway....

Was in a mall the other day and being sold at a kiosk was a reusable heat
pack. Permanently sealed, when you "snap" a metal disk in the pack's liquid,
the liquid crystallizes and releases heat. The sales-kid (and web reports)
say the
heat will last for 45 minutes or more. The part that's really great is you
can
reverse the process by boiling the bags in hot water - ready to be reused.

Seems to me this could be very handy for those cold boating days or
possibly even in a ditch bag.

Anyone use these and have comments and/or creative uses?


Hmmm, maybe someone could market little *cold* ones shaped like ice
cubes - never know when occasion for a cocktail might arise.

Gary