Are you considering the best way to get hot water for your Bali property? Demand gas water heaters are a popular choice, known for their low cost, effectiveness, and the fact that they never run out of hot water. These heaters are also called instantaneous water heaters, multipoint heaters, tankless heaters, geysers, or ascots. Let’s dive into how they work, their advantages, and some potential issues.
How Demand Gas Water Heaters Function
Unlike storage water heaters that heat a tank of water, demand gas water heaters heat water as it flows through the pipe to your tap. Inside, they have a heat exchanger, a vertical flue with a heating coil wrapped around it, and a gas ring with jets at the bottom. Cold water enters the coil and is heated as it moves through the cylinder, becoming hot by the time it reaches the top.
When you turn on a hot tap, the water flow triggers the heater to ignite the gas. As soon as you turn off the tap, the gas flow stops. You can adjust the gas and water flow, and flame size to control the water temperature.
Advantages of Demand Gas Water Heaters
- Cost-Effective: They are cheap to buy and operate.
- Easy Installation: They are quick and easy to install.
- Compact: They are very compact and don’t take up much space.
- Unlimited Hot Water: They heat water as needed, so you never run out.
- Environmentally Friendly: They are more efficient than electric heaters.
Potential Disadvantages
- Gas Cylinder Dependence: If not on a reticulated gas supply, you’ll need to change gas cylinders.
- Battery Changes: The ignition system may require battery changes.
- Maintenance: Servicing might be necessary, especially with dirty gas blocking the jets.
- Temperature Control: It can sometimes be challenging to control the water temperature.
- Low Water Pressure: They don’t function well with low water pressure.
Common Problems and Solutions
- Overheating and Shut-off: If water flow is too low, the heater will shut off automatically to avoid overheating. Turning the gas down is often the solution, not up.
- Low Flow Rates: The small pipes in the heat exchanger can cause low flow rates.
- Scaling: Hard water can cause calcium buildup, reducing flow. This issue may require professional repair.
- Unequal Pressure: Differences in hot and cold water pressure can cause the heater to switch off. Intelligent plumbing can address this.
Safety Considerations
Gas water heaters have open flames and need careful installation and operation.
- Ventilation: Mount heaters outdoors or in well-ventilated areas.
- Clearance: Keep flammable materials away from the flue, and do not put anything on top of the heater.
- Gas Cylinder Storage: Store gas cylinders in well-ventilated spaces, away from the heater.
- Regular Checks: Check regulators and gas hoses often.
- Professional Repairs: Never attempt repairs yourself; always call a qualified technician.
Demand gas water heaters can be a great addition to your property with the right installation and maintenance. By understanding their workings and potential issues, you can ensure you enjoy a reliable hot water supply.
