Running your hot water on LPG
On bottled LPG, a gas hot water system usually runs off a pair of bottles with a changeover valve. When one bottle empties, the valve switches to the full one, and that's your cue to order a refill. If both run dry, the hot water stops until the new bottle arrives, so it pays to keep an eye on them.
Storage tank. A gas burner under the tank keeps a full tank of water hot and ready. It suits houses where a few people shower one after another, and it works like the tank you're probably used to. It uses some gas keeping the water hot even when nobody is using it.
Continuous flow. There's no tank. The unit fires up when you turn on a hot tap and heats the water as it passes through, so it doesn't run out while there's gas. It's sized by how many litres a minute it can heat, which decides how many hot taps can run at once. It also needs a power point for its electronics.
Both kinds are usually fitted outside, because they need to vent. If you're replacing a unit that worked well for your house, the same kind is usually the simplest swap.
