Note: many people drill a hole in the wall so that the noise from the air compressor noise is in the other room. Or some people put the compressor in a closet. Also I do not like to put an air compressor next to my hyperbaric chamber anyway as they emit super high emf. If getting 2 size 80 motors and putting them in sync that is very quiet as just one size 80 motor is quiet to start with but the air flow is too low for many people. I like a lot of air exchange to get rid of the mugginess. Without a cooler the chamber gets to about 85 degrees when the room is around 70 degrees. The muffler brings it down to about 80 degrees. 5 degrees hotter makes a difference after about 30 minutes in there. The hyperbaric chamber start making me feel like I'm in a sauna.
Also, syncing 2 motors together gives less heat than a 120 or 200 motor. Many people have only experienced size 200 motors and never realized they could sync their compressors together for a whole new experience (See my compressor sync page. The bigger the compressor the more heat and louder the chamber will sound and also the noise from the compressor itself.
Two 120 motor compressors will sound quieter and give more air flow than a single 200 size motor that most hyperbaric companies offer with their chamber. I have asked if I could buy the chamber without their 200 size motor as that compressor costs 2000 dollars and why should I pay that if I am going to have to sell it and gonna sync 2 smaller ones. Reason is because they think I'm gonna go on the internet and buy a higher psi compressor so I can break the law and make my 1.3 ATA chamber go to 1.4 or 1.5 ata. That is the real reason they won't take off money and let you save money by not buying their compressor that they make money on in the first place. Arggghhh...
KEEPING THE HYPERBARIC CHAMBER QUIET:
Nearly everyone complains about the sound, especially those using compressors higher psi compressors.
Those looking for a 1.5 ATA chamber using a compressor that is nearly twice the power of a factor stock chamber. By factory stock I am referring to the air compressor that comes with any of the Oxyhealth, Oxynova, or Dive chambers. The chambers that go to only 1.3 ATA don't need a high powered and loud compressor. The Oxyhealth Chambers except their hard shell model and the Quamvis 320 all are 1.3 ATA rated. Only 2 of the Oxynova chambers are 1.3 ATA rated.
Note: on the Oxynova chambers that go to 1.4 ATA and the Dive Chambers that can go to 1.5 to 1.7 ATA, these can run on regular quieter compressors. Only those that want to go to higher pressures can change out the valves (in legal places) and change out the compressors for a higher psi version.
With higher pressure capable chambers or even using a higher psi pump to pump in faster air and more air turns it will always be louder the more air coming in at once. To lower the sound level, I strongly recommend getting a chamber with 2 valves and 2 compressors. This way all the air is not coming in twice as fast at once through only one valve. Newer chambers models have dual air valves. Older versions should have only one. If you are interested in just having 1 valve these are going to be cheaper but much noisier and warmer. Larger compressors make hotter air. Two smaller compressors that give the SAME PSI but deliver lower liters of air per minute I have found work best when working together. This way you get the same liters per minute but less noise and heat.
See my Syncing compressors page. Many people put one in each valve and fewer people put 2 in sync totaling 4 smaller compressors. Running 2 compressors in "parallel" is not the same as "syncing" 2 compressors one behind the other.
This is the sound muffler I use. This is hooked up to the air compressor and then to the chamber. The muffler dampens the sound so the sound is quiet enough that I can talk to someone on my cell phone while in the chamber and no one complains.
This also is the old cooler that cools down the air from the compressor.
If you are concerned about the noise in the hyperbaric chamber, this is the muffler that helps with the loud noise.
Note: for those that are really looking for just a few decibels lower, having the air compressor 50+ feet away by having a 50+ foot tubing dampens the sound. The compressor doesn't have to be 50 feet away, it's just the tube has to be 50 foot long. Not many people do this but I like it when people don't know I'm in my chamber unless I tell them. Having 2 air valves on the chamber and two 50 foot tubes makes it even quieter. It's really cheap to do this since its just clear tubing.