It comes down to three things: how many hot taps run at the same time, whether there is power at the geyser, and what your water pressure is doing. A 20L unit is the answer for a family home with two bathrooms; a 16L is comfortable for a single-bathroom house, and a Cadac 12L Ecoflow — suitable for a granny flat. Here are the five we install, with honest positioning on each.
Paloma 20L
Larger homes, estates, solar inlineFrom R22,000 supplied & installed
Needs electricity (weatherproof plug point)
A premium whole-house geyser. It holds temperature under mixer taps, runs happily inline with a solar setup, and doesn't need a weather cover. If you have two bathrooms and a busy morning, this is a unit that keeps up. Cylinders and a cage are extra.
See the Paloma 20L →Rinnai 20L
Premium whole-houseFrom R21,500 supplied & installed
Needs electricity (weatherproof plug point)
The same premium whole-house performance as the Paloma, manufactured in Japan and R500 apart on the installed price. Mixer-tap friendly, solar-inline capable and temperature-controlled. Cylinders and a cage are extra.
See the Rinnai 20L →Dewhot 16L Constant Temperature
Standard family homesFrom R15,000 supplied & installed
Battery-powered — works through load shedding
The value pick for a normal three-bedroom house. Constant-temperature control keeps showers steady, and because it runs on batteries there is no plug point needed. It does need a weather cover — rain and coastal moisture damage the board and loom.
See the Dewhot 16L Constant Temperature →Cadac 16L Ecoflow
Flats, granny flats, lower pressureFrom R12,200 supplied & installed
Battery-powered — works through load shedding
Practical and affordable, with a low-flow start that suits flats, granny flats, rentals and older plumbing with soft pressure. One bathroom at a time is its comfort zone. Cylinders, cage, cover and a flue where required are extras.
See the Cadac 16L Ecoflow →Cadac 12L Ecoflow
Granny flats, small unitsFrom R11,000 supplied & installed
Battery-powered — works through load shedding
Cadac 12L Ecoflow — suitable for a granny flat. A low-flow start, battery ignition and enough capacity for one shower or a kitchen at a time. Cylinders, cage, cover and a flue where required are extras.
See the Cadac 12L Ecoflow →Sizing as a guideline: 10L/min suits a kitchen, 12L a shower, 16L a bath, 20L a whole house. It is a starting point, not a rule — pipe runs, cylinder placement and simultaneous demand all shift the answer, which is why GasCraft George will assess the plumbing, installation position and hot-water requirements before quoting. The gas geyser buying guide works through the trade-offs in detail, and if you are running solar, read about inline gas geysers for solar homes first.