https://www.amazon.com/long-hot-wate...t+water+bottle
Has the ability to provide a short-term boost without the worry about duty-cycles and such.
No controllers, timers or other needlessly complex devices.

My wife and I like a cold room, but we temper that with the number of permitted pets on the bed. We have 180 pounds of available pets, being 95/25/20/20/20 (Golden/Scottie/Maine Coon/Main Coon/Main Coon Mix). And where the expression "Three dog night" came from.

Once again, demonstrating that this venue exists to provide needlessly complex solutions to otherwise simple problems using the most obscure means-and-methods presented with the maximum amount of obfuscation using as many words as possible.

Peter Wieck
Melrose Park, PA