Choosing the right water heater for your home is one of the most important decisions you'll make as a South African homeowner. With electricity costs continuing to rise and load shedding remaining a reality, many households are weighing their options between traditional electric geysers and gas-powered alternatives. Both systems have their merits, and the best choice depends on your specific circumstances, budget and lifestyle needs.

At Kwikot, we've been providing South African homes with reliable water heating solutions for over 120 years. In this comprehensive guide, we'll break down everything you need to know about gas and electric geysers to help you make an informed decision.

Electric Geysers

Electric geysers, also known as electric water heaters, work by using an electrical element to heat water stored in an insulated tank. The thermostat maintains the water at a set temperature, typically between 55°C and 65°C, ensuring hot water is available whenever you need it.

Our Superline range of electric water heaters represents the gold standard in domestic water heating. Available in capacities from 50 litres to 250 litres, these units are designed to meet the needs of households of all sizes.

Gas Geysers

Gas geysers heat water on demand using either liquefied petroleum gas (LPG) or natural gas. When you open a hot water tap, the flow of water triggers the burner, which heats the water as it passes through a heat exchanger. This means you only heat water when you actually need it.

The Gasmate range offers instant gas water heaters in various capacities, from the compact 5-litre unit ideal for single points of use, to the powerful 20-litre model capable of supplying multiple outlets simultaneously.

One of the primary considerations for most homeowners is the ongoing cost of operating their water heater. Let's examine how gas and electric systems compare.

Electric Geyser Running Costs

Water heating typically accounts for 30% to 50% of a household's electricity bill. A standard 150-litre electric geyser uses approximately 3kW of power and may consume between 300 and 400 kWh per month, depending on usage patterns and insulation quality. At current Eskom tariffs, this translates to a significant monthly expense.

However, there are ways to reduce these costs substantially. Installing a geyser blanket can reduce heat loss by up to 20%. Additionally, using a geyser timer to heat water only during off-peak hours can further reduce your electricity bill.

Gas Geyser Running Costs

Gas geysers only consume fuel when hot water is being used, making them inherently more efficient in terms of energy consumption. A 9kg LPG cylinder typically costs between R300 and R400 and can last a family of four approximately one month, depending on usage patterns.

The key advantage of gas is that you're not paying to keep water hot when you don't need it. This on-demand heating principle means zero standby losses, unlike storage-type electric geysers that continuously maintain water temperature.

Electric Geyser Installation

Electric geysers require a dedicated electrical circuit with appropriate circuit breakers and earth leakage protection. The unit must be installed by a qualified plumber in compliance with SANS 10254 standards, which govern the installation of hot water systems in South Africa.

Installation typically involves mounting the geyser (usually in a roof space or on a wall), connecting it to the water supply, and ensuring proper electrical connections. A drip tray is mandatory to catch any leaks and protect your home from water damage.

Pressure control is crucial for protecting your electric geyser and extending its lifespan. Our range of pressure control valves, including the Multi Pressure Control Valve, helps regulate water pressure and prevent damage from excessive municipal pressure.

Gas Geyser Installation

Gas installations require certification by a registered gas installer and must comply with SANS 10087 for LPG installations. The unit needs proper ventilation to allow combustion gases to escape safely, which often limits installation options to external walls or well-ventilated spaces.

You'll also need to arrange for gas supply, whether through a permanent LPG cylinder setup or, where available, a natural gas connection. Regular safety checks and gas leak inspections are essential for safe operation.

This is where gas geysers have a distinct advantage. Since they don't rely on electricity to operate, gas water heaters continue providing hot water during power outages. For many South African households dealing with regular load shedding, this uninterrupted supply of hot water is a major selling point.

Electric geysers, on the other hand, stop heating water when the power goes out. However, a well-insulated geyser can retain heat for several hours, meaning you may still have access to warm water during shorter outages. Investing in a quality unit with good insulation, along with a geyser blanket, can help extend this retention time.

For those who want the reliability of electric geysers without load shedding concerns, consider our Elon Solar PV water heating range. The Elon Smart Water Heating Unit converts your existing electric geyser into a solar-powered system, providing hot water even during power outages while significantly reducing your electricity consumption.

Electric Geyser Maintenance

A quality electric geyser, properly installed and maintained, can last 10 to 15 years. Regular maintenance includes checking the anode rod (which protects against corrosion), inspecting the temperature and relief valve, and ensuring the thermostat is functioning correctly.

We recommend annual inspections by a qualified technician. Our spares and accessories range includes everything you might need, from replacement elements to thermostats. For detailed maintenance guidance, check out our KwikTok maintenance series.

Gas Geyser Maintenance

Gas geysers typically have fewer components that wear out, with an expected lifespan of 15 to 20 years. However, they require annual safety inspections to check for gas leaks, ensure proper ventilation, and verify that the burner is functioning efficiently.

The heat exchanger should be descaled periodically, especially in areas with hard water, to maintain efficiency and prevent blockages.

Both systems have environmental impacts worth considering. Electric geysers in South Africa draw power primarily from coal-fired power stations, contributing to carbon emissions. Gas geysers, while burning fossil fuel directly, are generally more efficient, resulting in lower overall carbon emissions per unit of hot water produced.

For the environmentally conscious homeowner, there are greener alternatives worth exploring. Our heat pump range offers exceptional efficiency, using up to 67% less energy than conventional electric geysers. Domestic heat pumps extract heat from the surrounding air to warm your water, making them an excellent choice for sustainable water heating.

Similarly, solar thermal systems harness free energy from the sun. Our Kwiksol range includes both direct systems for frost-free areas and indirect systems for frost-prone regions.