How noisy are heat pump water heaters?

Heat pump water heaters make some noise during operation, akin to the hum of a refrigerator. In a garage, basement, or outside, they will not be disruptive.

Heat pump water heaters have a fan and compressor that make some noise while heating water.

While heat pump water heater noise is a concern for potential buyers, it is extremely rare for homeowners to report complaints about the noise. Especially when located in a garage or basement (where they're typically placed), their noise is not disruptive for the vast majority of homeowners.

• Decibel Range: The noise level is often cited between 40 to 50 dB, which is akin to a refrigerator's hum, and can rise to 60 dB in some models, particularly during peak operation or colder months when the unit works harder to extract heat from the air.
• Sound Type: The sound produced is usually a low hum or fan noise, which is less intrusive than the popping or crackling noises associated with traditional gas water heaters. However, some users report occasional clicking noises during operation, especially when the unit is recovering heat.

Check out this video which shows you what heat pump water heaters sound like during operation, and compares two options with different decibel ratings.