What is a decibel (dB) rating?
A decibel (dB) rating measures how loud a heat pump's outdoor and indoor units are while running. It's the number to check if a quiet backyard, a shared property line, or a bedroom near the indoor unit matters to you.
Why heat pump noise varies so much between brands
Most of the difference comes down to how a unit modulates. A true variable-speed compressor that ramps the outdoor fan and compressor together, not just the indoor blower, runs at a lower speed most of the time, and a slower-moving fan is quieter across a bigger blade. Many quotes advertised as "variable speed" only modulate the indoor unit, so the outdoor unit still runs at full power.
Typical dB ranges by tier
| Tier | Typical outdoor dB |
|---|---|
| Bronze / single-stage | ~70–76 dB |
| Silver / two-stage | ~65–72 dB |
| Gold / variable indoor only | ~55–65 dB |
For reference, 70 dB is close to a running dishwasher. 50 dB is closer to a quiet conversation.
How Jetson Air compares
Jetson Air runs 46.5 dB in cooling on a 2-ton outdoor unit, as low as 35.5 dB in silent mode, and no higher than 52.5 dB in heating on its largest size, quieter than the "Gold" tier most contractors quote, because both the outdoor fan and the compressor modulate, not just the indoor unit.
Common questions
Does "variable speed" guarantee a quiet unit? Not on its own. Check whether the outdoor unit's fan and compressor both modulate, or only the indoor blower. That's what actually drives the noise difference.
Where is dB usually measured? Manufacturers typically publish outdoor sound levels from a fixed test distance. Always compare like-for-like (same distance, same condition) across quotes.
Curious how quiet a system would run at your home? See your price from your address, no in-home visit needed to start.