Understanding the Differences Between Tankless Water Heaters
When it comes to water heaters, tankless models are becoming increasingly popular due to their efficiency and versatility. These units boast a lifespan that can be double or more than traditional storage water heaters, and they offer several advantages. However, before making a decision, it's important to understand the different types of tankless water heaters available, their features, and how they operate.
Types of Tankless Water Heaters
The primary types of tankless water heaters include electric, natural gas, and propane-powered units. These options cater to various needs and can be installed in different areas of the home, making them a versatile choice for homeowners. Each type operates differently, and understanding these differences can help you make an informed decision.
Electric and Gas Tankless Water Heaters
Electric tankless water heaters can be powered from household electricity, making them a convenient choice for homes with reliable electrical systems. They are quieter and produce fewer emissions compared to gas models. On the other hand, gas tankless water heaters use propane or natural gas to heat water, making them a more energy-efficient option, especially for homes that already have a gas line for other utilities. Propane tankless water heaters can be a viable option for homes located in areas where gas is more readily available.
Flow Capacity Considerations
A key consideration when choosing a tankless water heater is its flow capacity. This is the maximum amount of water that the unit can heat in a specific amount of time, usually measured in gallons per minute (GPM). While some units may be more efficient and offer higher flow capacities, the average homeowner may not have the technical knowledge to understand the significance of flow capacity, BTUs, and other such metrics.
Demand Igniter vs. Pilot Light
A significant difference between tankless water heaters and their traditional counterparts is the operation mechanism. Most modern tankless units use a demand igniter that senses water flow, opens the gas valve, and ignites to heat the water. This is in contrast to the standing pilot light found in storage water heaters, which is always lit and constantly consuming energy. The demand igniter is activated only when hot water is needed, making it more energy-efficient.
Benefits of Tankless Water Heaters
One of the most significant advantages of tankless water heaters is their ability to provide an endless supply of hot water. Unlike traditional storage water heaters, which maintain a constant temperature in the stored water, tankless units heat water on demand. This means that as long as water is flowing, you can continue to take hot showers without running out of hot water. Additionally, since these units don't maintain a constantly heated reservoir of water, they can save up to 30% on water heating costs compared to traditional water heaters.
Annual Maintenance and Lifespan
While tankless water heaters offer numerous benefits, it's important to note that they do require annual maintenance. This includes cleaning the inside of the unit, checking for corrosion, and ensuring that all parts are functioning properly. Although this maintenance is necessary, it may offset some of the cost savings over the long term compared to traditional water heaters. Tim Boardwell, an energy efficiency expert, emphasizes the importance of regular maintenance to extend the life of these units and maintain their efficiency.
Conclusion
Choosing between a tankless and traditional water heater ultimately depends on your specific needs and circumstances. Tankless water heaters offer the convenience of endless hot water and can save you money in the long run. Understanding the different types of tankless water heaters, their features, and the importance of annual maintenance can help you make the best choice for your home.