[VOA]

As an aside, today I have a "Mr. Heater Buddy heater"
This IS a small propane heater that runs on those disposable
propane tanks you use for camp stoves and lights.

I have the "Big Buddy" heater.
In my personal experience it will run about 2.5 hours on full heat
with two one-pound bottles of propane.
I suspect it will keep about 400 sq. feet of living space fairly
comfortable under external conditions of freezing to maybe 10
deg. F.
But I'd still get excess bottles of propane in preparation for
more challenging scenarios.
(it's capable of running on full-sized propane bottles with the right rigging)

I bought it last year in case we had a full power outage
and my fairly-homebound father needed to stay warm at home.

Dad went on to his well-earned reward earlier this year.
And the Big Buddy provides my dear mother with lovely warmth
like the old open gas heater that kept the extended family
warm on the family farm.
About five decades ago.

[snowtigger]

They do look like those old room heaters.

I bought mine to heat the cabin on my boat during hunting season. Here it can get into the 20's 0r even the teen's during Sept hunting season. I have a conversion hose for that purpose. My"Buddy" is one of those things that never get left behind.

For the car, I decided to revert to the screw-on cylinders because I can keep them in the heated part of the car. A six-pack will be enough to keep me until help arrives, even in the worst weather. The smaller "Buddy" puts out either 4,000 btu's or 9,000 btu's. One pound of propane contains about 22,000 btu's, so even at 9,000 btu's, I have about 15 hours of burn time. Even in the worst weather, help would arrive along the roads I drive.