Though there are many types of gas geysers like piezo ignition, hydro generated, storage geyser, Zero start, battery operated to fan forced units they all come in different sizes and some have been discontinued from the market!  The top range gas geyser on the market are the constant temp/ fan forced units that has more reliability and longer live span then the entry level gas geysers! The two types of gas geysers we specialize in are the zero start battery operated and fan forced/constant temp gas geyser as shown below!

• Immunity to Power Outages: The primary advantage is that they operate using only gas and small torchlight batteries for ignition, ensuring a reliable hot water supply even during electricity blackouts or load shedding.
• Cost Efficiency: While installation can be an upfront cost, the month-to-month running costs are generally lower than electric geysers, as you only heat water on demand, reducing wasted energy from keeping a tank constantly hot.
• Instant and Continuous Hot Water: As long as you have a gas and water supply, the geyser provides instant and continuous hot water, which is ideal for large families or back-to-back showers.
• Compact Size: These units are typically small, tankless, and wall-mounted, saving valuable space compared to bulky electric storage geysers.
• Simplicity and Repair: They have a relatively simple mechanism, making them familiar to most technicians and generally easier and less expensive to repair than more complex "forced fan" models. 

• Limited Functionality: Standard battery models often cannot supply hot water to multiple outlets (e.g., two showers or a shower and a kitchen sink) simultaneously without significant temperature fluctuations.
• Ventilation and Safety Concerns: Because they involve combustion, they require proper ventilation when installed indoors to prevent the build-up of carbon monoxide, and many models need a weather cover and a flue/chimney when installed outdoors.
• Gas Management: Users must monitor gas levels and arrange for cylinder refills or replacements, which can be an inconvenience.
• Susceptible to Environmental Factors: They can be sensitive to wind (which might blow out the flame) or extreme cold (risk of freezing if not adequately protected), and may struggle with very low water pressure.
• Less Precise Temperature Control: Unlike advanced forced-fan models with precise digital temperature settings, standard battery units often have simpler controls, meaning you might have to add cold water to regulate the temperature manually.

• High Efficiency: Fan-forced combustion ensures complete burning, making them very gas-efficient and cost-effective long-term.
• Precise Temperature Control: Electronic controls allow you to set exact water temperatures.
• Reliable Performance: Works well with low water pressure and isn't affected by wind, providing consistent hot water.
• Multi-Tap/Multi-Floor Use: Can supply multiple taps and even upstairs bathrooms simultaneously.
• Weatherproof & No Flue: Often designed for outdoor or internal installation without traditional flue pipes.
• Solar Compatible: Can be integrated as a backup for solar water heating systems.
• Longer Lifespan: Superior build quality often leads to a longer operational life. 

• Higher Initial Cost: Significantly more expensive to purchase than standard models.
• Electricity Dependent: Needs electricity for ignition and electronic controls; requires a UPS, inverter, or generator for power outages.
• Installation Complexity: Requires professional installation and surge protection for electronics.
• Power Surge Risk: Electronic components are vulnerable to surges, necessitating surge protection.
• Potential CO Risk: Like all gas appliances, proper ventilation is crucial to prevent carbon monoxide buildup.