How much noise does it make when running?
997120
It is relatively quiet. We mostly use it in a storage bay in our motor home but have used it in our jeep too. You can hear a quiet hum.
640316
I find it very quiet when just running. But when I walk on it, it is noisier than I expected. There doesn't seem to be any padding under the rubber mat you walk on, so just the walking motion of your feet is fairly noisy. I've gotten used to it, but if you are sharing an office, the other person might find the noise level annoying.
134431
I find it to be quite loud - when running it sounds like I'm stomping my feet on it. I've been running routinely at gyms for 10+ years and have never had this issue. My model may have a defect though, I don't know.
1044853
I would say the noise level is about the same as others. Maybe just ever so slightly quieter. I bought it because it is very light in weight.
1332737
I think it's quiet- my husband can't hear it when I'm running in the other bedroom. I do wear headphones most of the time, though. On the weekends I use the built in speakers and they're great.
2279350
Not overly loud, I run mine inside a separate building and can't hear it inside my house. You certainly would not won't to be in the room with it for ant length of time.
700274
It is a diaphragm pump, so they do vibrate when running. If it is mounted using the rubber mounts and isn't touching anything else, it should be pretty quiet.
2024239
Loud enough, I wouldn't feel comfortable running outside allowable hours in a campground, that's for sure. It's in no way quiet. Not sure about running time, should be inversely proportional to power, which is good for this unit. :-) price is right!
473000
It is not particularly noisy. It cycles automatically over a preset timed cycle that the operator sets. We have been very happy with this product..
538704
It's def louder than a portable generator. If you start it up and don't hear it, you better go check on it. Having said that tho, I don't mean to say that it is distractingly noisy, just that you're going to hear it running.
1085673
Sorry I don't know. I purchased for resale and the customer has not mentioned any excessive noise
58591
I can hardly hear it running. Its whispers. (Quiet). I have to feel the sides to see if it's still running.
1996204
Compared to what? You will certainly hear it running. It is louder than a ceiling fan. It doesn't keep me awake, though, and I am right smack next to it at night, so I can hog all the cold air.
159788
Depends on how close others are. It does make some noise, but I, personally, do not find it loud.
2048168
It is not whisper quiet. You will know when it is running. I have it outside of the house and when I am indoor with all windows and doors closed, I can hear it. Nothing too crazy, but can be heard.
1088867
Noise is different to each person; however I find it to have a normal motor sound which is not that loud. I run mine in an enclosed garage, checking on it periodically.
336603
I'm not sure. I gave it to my niece who lives across the ocean. I know that it makes sounds, and that she likes it, but I honestly don't know how loud it is.