I’m surprised how little there is currently on the internet regarding how long gas cylinders should last on a gas geyser. So I felt I should add my two cents.
We installed the 20L/min Paloma gas geyser with a 48kg gas cylinder on 12 February. It is now 1 June and it’s still going. I’m hoping for another two more weeks tops which will total 4 months exactly. For now, it’s at least 0.02kg/hr.
It’s a small household of two people where we average two showers a day. Maybe once a week a bath is run instead of a shower. Occasionally we have an overnight visitor or two. Hot water is opened as usual in the kitchen a few times a day for a minute at most. Once a week hot water is used more extensively for cleaning and filling buckets etc. Our hot water appliances heat their own water (dishwasher, washing machine).
We do have to wait a good twenty seconds or so for taps to heat up every time we open the hot tap!
My guess is that we probably run the hot taps on an average day around 10-12min per day in total. That probably goes up to 15-20min on cleaning day.
Maybe this information would help someone in a similar context.