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Uncover the truth: does a tankless water heater make noise?

Rob is a seasoned home improvement writer with over 15 years of experience researching and recommending products for the home. Prior to starting Nurturing Homeaid, he wrote extensively for This Old House magazine and has been featured as a home expert on several TV and radio programs. An avid DIY-er,...

What To Know

  • If the garage is detached or well-insulated, it can be a suitable location for a tankless water heater.
  • It’s not recommended to install a tankless water heater in a bedroom due to potential noise disturbances.
  • What is the best way to reduce combustion noise from a tankless water heater.

The question of “does tankless water heater make noise” is a common concern among homeowners considering this energy-efficient alternative. Tankless water heaters, unlike traditional tank models, heat water instantaneously as you need it, eliminating the need for a bulky storage tank. While this feature offers numerous benefits, it also raises questions about potential noise levels. In this comprehensive guide, we delve into the factors influencing tankless water heater noise and provide practical solutions to mitigate any potential disturbances.

Factors Affecting Tankless Water Heater Noise

Several factors contribute to the noise produced by tankless water heaters:

  • Water Flow Rate: The higher the water flow rate, the more noise the unit will generate. High-flow appliances, such as showers and bathtubs, can create louder sounds.
  • Water Pressure: Higher water pressure can increase the velocity of water flowing through the unit, resulting in louder noises.
  • Gas Type: Gas-powered tankless water heaters typically produce more noise than electric models. Natural gas burns with a higher flame intensity, contributing to louder combustion sounds.
  • Unit Size and Design: Larger tankless water heaters with higher heating capacities tend to be noisier than smaller units. The design and construction of the unit also play a role in noise levels.

Types of Tankless Water Heater Noise

Tankless water heaters can emit various types of noise:

  • Combustion Noise: This is the sound produced by the burning of fuel (gas or electricity) to heat the water.
  • Water Flow Noise: As water flows through the unit, it creates a turbulent flow that can generate noise.
  • Mechanical Noise: Fans, pumps, and other mechanical components within the unit can also contribute to noise levels.

How to Reduce Tankless Water Heater Noise

To minimize noise from your tankless water heater, consider the following strategies:

  • Choose a Quiet Unit: Look for models with lower noise ratings. The noise rating is typically measured in decibels (dB) and lower numbers indicate quieter operation.
  • Install Noise-Reducing Accessories: Install silencers or sound blankets around the unit to absorb and dampen noise.
  • Proper Installation: Ensure the unit is installed correctly, with adequate clearance and proper venting.
  • Adjust Water Flow Rate: If possible, reduce the water flow rate to the unit. This will lower the velocity of the water and minimize flow noise.
  • Install a Pressure-Reducing Valve: This device can reduce water pressure, which can help decrease combustion noise.

Where to Install a Tankless Water Heater for Minimal Noise

To minimize noise disturbances, consider installing the tankless water heater in the following locations:

  • Outdoor: Installing the unit outside the house eliminates noise from penetrating indoor living spaces.
  • Basement or Utility Room: These areas are typically isolated from main living areas, reducing noise transmission.
  • Garage: If the garage is detached or well-insulated, it can be a suitable location for a tankless water heater.

When to Contact a Professional

If you encounter excessive noise from your tankless water heater, it’s advisable to contact a qualified plumber or HVAC technician. They can assess the situation, identify the source of the noise, and recommend appropriate solutions.

Wrap-Up: Striking a Balance between Efficiency and Comfort

Tankless water heaters offer energy savings and convenience, but it’s important to consider potential noise levels before installing one. By understanding the factors affecting noise production and implementing noise-reducing strategies, homeowners can enjoy the benefits of tankless water heating while minimizing disturbances.

Q: How loud are tankless water heaters?
A: Noise levels vary depending on the unit, but most operate between 50-70 dB. This is comparable to the sound of a dishwasher or vacuum cleaner.

Q: Can I install a tankless water heater in my bedroom?
A: It’s not recommended to install a tankless water heater in a bedroom due to potential noise disturbances. Consider installing it in a more isolated location.

Q: What is the best way to reduce combustion noise from a tankless water heater?
A: Installing a pressure-reducing valve can help lower combustion noise by reducing water pressure.

Rob Sanders

Rob is a seasoned home improvement writer with over 15 years of experience researching and recommending products for the home. Prior to starting Nurturing Homeaid, he wrote extensively for This Old House magazine and has been featured as a home expert on several TV and radio programs. An avid DIY-er, Rob takes pride in testing out the latest tools and gadgets to see how they can make home projects easier. When it comes to heating systems, he's evaluated over 50 different furnace and boiler models over the years. Rob founded Nurturing Homeaid with his business partner Jim in 2020 to provide homeowners with genuine product recommendations they can trust. In his free time, Rob enjoys remodeling old homes with his family and traveling to visit architectural landmarks across the country. He holds a bachelor's degree in Journalism from Syracuse University.
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