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How long do 45kg LPG bottles last?

Good question. It really does depend on what you are running and how you use it, and it can be a little hard to say. However, we are going to let you in on a few numbers that might just give you an idea so you can roughly work out your usage of gas bottles.

Calculating how long an LPG bottle will last

Using the calculation below you can work this out yourself.
  • 1 kg of LPG gas contains 50.4 MJ of energy
This means that 1 x 45 kg LPG gas bottle has 2268 MJ of energy
  • 45 kg x 50.4 MJ = 2268 MJ
To work out how many hours an LPG gas bottle will last, you need to know the total Megajoule rating of all the appliances you are running. This can normally be found on the data plate or in the product manual, and if you don't have that try Google with the product and model number.

Let's look at an INFINITY® VT26 as an example

Minimum operating 2.4L per minute = 14 MJ/H
Divide the total energy (MJ) in the bottle by the total MJ input as above 14 (in MJ/h).
  • 2268 MJ ÷ 14 MJ/h = 162 hours approx of continuous use (per 45kg bottle)

Maximum operating 26L per minute = 199 MJ/H
Divide the total energy (MJ) in the bottle by the total MJ input as above 199 (in MJ/h).
  • 2268 MJ ÷ 199 MJ/h = 11.39 hours approx of continuous use (per 45kg bottle)
So there is quite a difference between 162 hours and 11 hours of continuous use. How much are you going to use?

You can consider one example – a shower typically uses 10-12L of water per minute in total. Approx 6-8L will be hot, the rest you'll mix with cold to get your perfect temperature.

As a very rough average you may expect to get 40-50 hours of continuous showering from 1 x 45kg bottle.

In a future blog we may just test this out.

About Gas Leaks

If you find you are suddenly going though bottles much faster, check for leaks. Your delivery drivers will check when they install and sometimes they'll leave a card saying you have a leak. You'll need to call a gasfitter like us to repair.

IF YOU THINK YOU HAVE A GAS LEAK – AND IT'S SAFE TO DO SO – TURN OFF THE GAS, LEAVE THE IMMEDIATE AREA AND GIVE US A CALL

If you have any questions we are Plumbers and Gasfitters so talk to us. See our shop for great deals on installations and specials.


 

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