How long do your propane tanks last?

Im sure there are a lot of variables to consider when answering the question, but i was wondering if people with Co2 burners can tell me how long do their propane tanks last for

someone........

i have found Co2 calculators and stuff, but i still dont konw how long to expect it to last. Say the calculator says 12 hour run time, that is on continuosly. The burner is on for short intervals during the day, so how fuking long will it fuking last.

and does anyone know if a generator can be hooked up to the stove gas line?

my propane tank lasts me about 6-8 days.

wtf!!!
are you talking about co2 tanks ( the kind you fill balloons with) or generators with propane tanks.
thats fuking insane, you have to replace that thing every week?
how big is your room, and burner?
ppm?

I hown a 12000btu propane generator, the generator can run about 1h 45 non-stop per pound of gaz (but the generator never run steady, he stop when reach 1500ppm and restart at 1400ppm, it's run 5 min. and stop for 10 to 15 min. an restart again, so the generator run for around 2h per days in my room in 12/12) So a tank of 20 pound can run for about 30h non-stop (so about 15 days for me. But it's a small room 8X6, if the room is bigger the generator will run for more than 5 min or if you used a bigger generator it's will burn more gaz per hours.

So depending of the size of the room it's could run for 1 weeks and more on a 20 pound tank, i will link you to a web-site with very good calculators, one of them: PROPANE CALCULATOR let your write the size of your tank in pound and the power of your generator in BTU, the answer will give you the maximum time your generator wil work non-stop, after you can figure better how much time it's will run for you.

The only thing it's a french site, but numbers have no language: http://www.fernandpigeon.com

I run my CO2 for my whole veg and it took me that long but yeah I have a big place, i run my Co2 at 1500 ppm at all times during flowering too.

I had no idea it used so much propane, this entire time i was like yeah, fuck it just close the room and pump with co2.
i have recently found out that its possible to connect a natural gas burner to a home gas line.
i think thats what ill do, no fuking way im changing tanks every week.
thanks to all who posted