Dewhot geysers fitted by our installers

Gas geyser in a weatherproof cover with insulated pipesKemp Jonker, March 2024
Gas geyser in a weatherproof cover and the gas line to the cylinderWinelands Gas
Gas geyser in a weatherproof cover with new copper pipesShineBright, added September 2026
Gas geyser in a weatherproof cover between two windowsShineBright, added August 2026
Gas geyser in a weatherproof cover above a water filter systemShineBright, added May 2026
Gas geyser in a weatherproof cover with water filters belowShineBright
Gas geyser in a weatherproof cover with insulated pipesTTS Gas, January 2023
Gas geyser in a weatherproof coverGas Solutions

Photos from the installers' own jobs.

The four types

Type	Sizes	Best for	Indoors?	Brochure
Room-sealed fan-forced (RS20)	20 L	Larger homes, several showers at once, flats and townhouses with close neighbours	Yes: draws air from outside and vents through a double flue	RS20 (PDF)
Constant temperature	12 L, 16 L	Most family homes; holds the set temperature as taps open and close, and works from about 4 L/min water flow	12 L with a flue; 16 L outdoors only	Constant temperature (PDF)
Low pressure	5 L, 12 L	Tank or gravity-fed water, farms, camping and outdoor showers; one outlet at a time	5 L yes, without a flue, in a ventilated space; 12 L with a flue	Low pressure (PDF)
Diaphragm activated	6 to 16 L	Budget water heating; the simplest to install	No: outdoor only	Diaphragm activated (PDF)

The brochures are from 2021; Dewhot may have changed models and features since, so check the current range with the installer or on dewhot.co.za.

Which one fits your home

One shower at a time, good water pressure: a 12 L constant-temperature model is the usual choice.
Two bathrooms used together: a 16 L constant-temperature model outdoors, or the RS20 where it has to go indoors.
Low pressure or a JoJo tank: a low-pressure model.
A basin, sink or outdoor shower only: the 5 L low-pressure unit.

The installer confirms the size from the taps you want to run together, your water pressure and where the geyser can go. More in the gas geyser installation guide.

What Dewhot geysers cost

Dewhot's own price list (updated September 2026) runs from R2,369 for a 5 L to R17,011 for a 30 L, for the unit only. Fitting, the gas line, cylinders, any flue or cover and the Certificate of Conformity come on top. See gas geyser prices for other brands and what an installation adds.

Features worth knowing

Flame failure device on every type: the gas shuts off if the flame goes out.
Battery ignition on the constant-temperature and low-pressure models, so they run without electricity during load shedding. The fan-forced RS20 needs power for its fan.
Anti-freeze function on most models, useful on the Highveld and in the Free State in winter.
Natural gas versions of some models, for homes on a piped gas supply.

Where people ask for this

In the last 12 months, gas geyser installation requests through National Gas Installers came from East Rand (316), Pretoria (288), Johannesburg (246), Roodepoort (158), Alberton (107), Centurion (90), Cape Town (88), Bellville and Durbanville (77), Witbank (39), Durban (38), Bloemfontein (33), Bloubergstrand (28) and Strand and Somerset West (27). Each area page shows who the local installers are:

Want a Dewhot (or another make) fitted at your home?

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Sources: Dewhot product brochures (2021) and Dewhot's price list at dewhot.co.za (updated September 2026). National Gas Installers is not part of Dewhot and earns nothing from the brand.

Last reviewed 2026-11-08. This guide is general information; the installer will advise on your installation after seeing it.

Gas geyser installers by area