Hi Lisa @lisalucier -- Yuppers! That's one of the joys of the CPAP mask/hose. There is the exhale vent on the mask connector. Some of them vent down or to the sides. Mine goes the same direction as the elbow of the connector so I can direct it. I have a CPAP hose holder that I lets me move the hose around easy and position it to minimize or direct where the air is directed. Another thing I've tried is to loosely wrap a piece of soft cloth around the elbow connector on the mask to muffle the outgoing air a little. You could probably use a safety pin to hold the cloth on it by just pinning the cloth...or a piece of tape. I used a piece of an old t-shirt - clean of course! 🙂

Is it CPAP or BIPAP and does he have a heated humidifier or heated tubing? On CPAP you can change the setting (it's in the menu that users don't have access to unless they watch YouTube videos) to C-Flex+ rather than C-Flex. The plus is a comfort setting that stops or reduces the amount of airflow from the machine during exhaling. Heated humidifier and/or tubing helps some also. If he is using Auto CPAP he already has the built-in exhale comfort setting so I'm lost. I sleep alone so I have not had issues with cold Arctic blasts, lol.

Additional comment, my sister's husband uses a BiPAP machine and she has never complained about the cold arctic air. Trust me when I say that she does not like her sleep disturbed and would have told both me and her husband immediately if it was a problem.