Frequently Asked Questions

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Plumbing     

Hot Water Heaters  

Tankless Water Heaters   

Local Law 152


What is a tankless water heater?

A tankless water heater is a water heater that heats water without the use of a tank. Instead, the water is heated on demand as it flows through a heat exchanger. Most newer homes are being built with tankless water heaters due to their efficiency and continuous hot water supply. Tankless water heaters offer several significant advantages compared to standard tank water heaters. Firstly, they require much less space as they do not have a water storage tank (which is the main space-consuming component of a standard water heater). The water flows back and forth through a heat exchanger, absorbing heat from the forced air as it passes through the fins of the heat exchanger. In the case of digital smart tankless units, they measure the inlet water temperature and flow rate to self-adjust the gas regulation. This technology enables efficiencies of up to 97% with condensing tankless water heaters. In contrast, most storage tanks experience heat loss when not in use, resulting in a significant standby heat loss and lower efficiencies of around 75% for tank-type water heaters.

Should I get a tankless water heater?

Whether or not to get a tankless water heater depends on your specific needs and circumstances. Here are some factors to consider when deciding:

Continuous hot water supply: Tankless water heaters provide hot water on demand, so you won't run out of hot water even with high demand. If you have a large household or frequently require simultaneous hot water usage, a tankless water heater may be beneficial.

Space-saving: Tankless water heaters are compact and wall-mounted, which can save valuable space compared to traditional tank water heaters. If you have limited space or prefer a more streamlined setup, a tankless option might be suitable.

Energy efficiency: Tankless water heaters are known for their energy efficiency. They only heat water as it's needed, eliminating the standby heat loss associated with tank water heaters. This can result in lower energy consumption and potentially reduced utility bills. However, the energy savings may take some time to offset the higher upfront cost of tankless units.

Upfront cost: Tankless water heaters generally have a higher upfront cost compared to tank water heaters. Consider your budget and weigh the initial investment against potential long-term energy savings and benefits.

Longevity: Tankless water heaters typically have a longer lifespan than tank water heaters. While tank units may last around 10-15 years, tankless models can last up to 20 years or more with proper maintenance. This extended lifespan may contribute to long-term cost savings.

Installation considerations: Installing a tankless water heater may require modifications to your plumbing and electrical or gas systems, depending on the type of unit you choose. It's essential to consider the installation requirements and associated costs before making a decision.

Maintenance: Tankless water heaters generally require less maintenance compared to tank units. However, they may still need periodic maintenance, such as descaling the heat exchanger, to ensure optimal performance.

It's recommended to consult with a professional plumber or a qualified technician to assess your specific needs, evaluate your home's infrastructure, and provide personalized recommendations. They can help you determine if a tankless water heater is the right choice for you and guide you through the installation process.


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