Heater, Demand (Tankless) Water Explained

As HVAC professionals, understanding the nuances of various heating solutions is crucial for delivering efficient and cost-effective systems to clients. One such solution that has gained immense popularity in recent years is the tankless water heater. A tankless water heater, also known as a demand water heater, is a type of water heating system that operates without a traditional storage tank.

What is a Tankless Water Heater?

In essence, a tankless water heater heats water directly as it flows through the unit. When a hot water tap is turned on, cold water travels through a pipe into the heating unit, where either a gas burner or an electric element heats the water on demand. This means that you have a continuous supply of hot water without the limitations imposed by a storage tank.

Advantages of Tankless Water Heaters

• Energy Efficiency: One of the most significant benefits of tankless systems is their ability to eliminate standby heat losses that occur in conventional storage tank water heaters. Since water is heated only when needed, these systems can lead to significant energy savings over time.
• Space Saving: Without a bulky storage tank, tankless heaters are compact and can be installed in smaller spaces, making them a great option for residential and commercial applications where space is a premium.
• Longevity: Tankless water heaters generally have a longer lifespan compared to traditional water heaters. With proper maintenance, they can last up to 20 years or more, reducing the need for replacements.
• Continuous Hot Water Supply: As they heat water on demand, these systems provide an endless supply of hot water, which is ideal for larger families or commercial settings with high hot water demands.

Considerations for HVAC Professionals

While there are numerous benefits to tankless water heaters, HVAC professionals should also be mindful of specific considerations:

• Flow Rate: Ensure that the selected unit can meet the peak demand of the household or facility. It’s vital to calculate the required flow rate to avoid running out of hot water.
• Installation Requirements: Tankless systems typically require larger gas lines and specific venting requirements for gas units, or adequate electrical supply for electric systems. It's essential to be aware of local codes and installation guidelines.
• Maintenance: Regular maintenance is necessary to prevent mineral buildup, especially in areas with hard water, which can affect efficiency and lifespan.

Conclusion

Tankless water heaters are a compelling choice for both residential and commercial applications due to their energy efficiency, space-saving design, and direct delivery of hot water. As HVAC professionals, embracing this technology not only enables you to meet the growing consumer demand for energy-efficient solutions but also positions you as a knowledgeable expert in the field. Proper installation and maintenance practices ensure clients receive the full benefits of their tankless systems, leading to increased satisfaction and loyalty.