I have been firing with Propane for a couple of years. I have a small updraft kiln and have been firing it with a pair of 100lb (26 gallon)propane tanks, in a dual tank configuration and I run then both at the same time. I get three firing out of the two tanks, then have to haul them down to the local farm co-op to refill them. I am getting a new larger kiln next weekend, but the burner configuration is the same so the BTUs should be pretty close as well. I am sure it will use more volume of gas as it has to heat up more mass. My question is when is the right time to upgrade and which option is best.
1. Just buy another 100lb tank to add in series and keep going with 3 firings per refill. This is the cheapest option as the tanks are cheap. However I would still need to go down to refill them. Perhaps I could call a mobile refill company and have them come to me, but with such a low volume I bet I would have to pay a delivery charge. They would not come out for 50 gallons of propane I am sure.
2. Go buy a 250 gallon tank and then have a company come put the refill it when I need to, which may be every other month or so I would guess.
3. Get a contract with a local propane provider and have them subsidize the 250 gallon tank and setup regular fill. I assume this would be the most expensive.
So how do you do it.