70K-125K BTU Propane Forced Air Heater

If it will hook up to the heater, don't believe the heater cares if it's a 50lb, 80lb, 100lb propane tank.....

No..............

I've used a number of size tanks, from 20 lb to a 100 lb and have never encountered the problem you describe, even on some sub-zero days. The only thing I can think of is vertical air flow if you're up on scaffolding. I've never had cold direct wind or a heavy air flow when I've used the heater, but even then, it would have to be a fairly strong wind/vertical freezing air flow. Have you called the company, spoken to anyone in their tech department? I'm confident they have one, somebody who can answer any questions you may have.

I do not believe that will be a problem, with the following caveats: 1. Make sure there is nothing close by that is flammable/could burn/ignite. If you have say about 15' to 20' from heat discharge, you should be okay. 2. I would not stay in the room, just open the bedroom door every few minutes to make sure all is well. I've used my heater in our cellar during the cold months when I wanted to get some woodworking done...never had a problem with fumes/odor...did keep the cellar door open a bit to get some fresh air circulating. I'm not sure though if the room will reach 140 degrees...maybe it will, never tried anything like you want to do. Isn't there some kind of safe spray out there to get the job done? I know they sell so called 'room bombs' to get rid of flea infestations. Anyway, good luck.....

No

4 to 8 hours depending upon BTU setting..................

The info provided says it will run for 12 hours. I'm guessing that is at the highest setting so it may be longer at the lower setting.

In the manual, it says you may have to leave it depressed in the lighting mode for a bit. I've noticed it takes longer to stay lit when the temps drop.

I wouldn't recommend it. Amount other things, you need at least 36" clearance above the heater to combustible material. You would stand a good chance of setting the floor of the trailer, or the vapor barrier on fire.