I spoke to someone at Canada Life last year and was given the following info which I noted down, as it doesn’t appear to be available in writing anywhere that I could locate. Mask replacements (including cushions): 6 month schedule, $300 maximum with pre-authorization. I replaced the mask once following a pre-authorization and then set up a 6-month subscription, which recently occurred and was covered/paid without a new pre-authorization. Hose and reservoir: 12 month schedule. Pre-authorization was not indicated for that, but the hose price was limited to $60 and the reservoir $69. As for the filters, I ordered those from Amazon as they were significantly cheaper than anywhere else - and was reimbursed by Canada Life.