In February, my ACT Oxygen system was installed in our mountain property. Our first visitors were our grandchildren, who in the past have had negative reactions to visiting us at altitude. We let them sleep in the oxygenated bedroom during their stay and to our delight neither child had any negative reactions to the altitude. They were able to enjoy their stay with us without altitude fatigue or symptoms. We look forward to next Christmas when our Daughter-in-law, who will not travel to see us because of past altitude induced problems has agreed to make the trip and stay in our mountain home with the ACT System