Looking for a Mr. Buddy Heater

jauguston wrote:
The little green tanks are one pound capacity. 5 hours on low.

Here's your answer to how long.

I have two regular Mr Buddy Heaters and a large Mr Buddy Heater (which I almost never use). We often use one in our living room and basement office to take the chill off in the winter. My wife LOVES it. It will work VERY WELL for your intended purpose.

Of course it's important to observe the safety instructions and ensure that you maintain appropriate ventilation. With that said, I experimented with mine in my travel trailer. It would automatically shutoff before I could detect any changes in the air quality, and the CO alarm never even registered a thing. I would still not sleep with it running though.