I'm loving that your out there field testing and reporting back. We are gonna uses your info. Question for ya, do you have a quick, rough, formula for determining how long a full propane tank will last you running these things? For example, a 20 lb propane tank @ 80% will last you how long with running 4000 btu? Follow me? I haven't used a propane system before. Seems like it would be nice to figure out ahead of time when your gonna drain the tank.
Did you add the CO monitor?