Frequently Asked Questions (FAQs) FAQs for Product: Resmed H4i Humidifier and TUBE WRAP 1. I currently have the Resmed S8 Autoscore with a 3i humidifier. will this humidifier replace the 3i as i can only find the container for the 3i on your website? (Posted: 17th Nov, 2010) Question & Answers for Product: Resmed H4i Humidifier and TUBE WRAP Q. I currently have the Resmed S8 Autoscore with a 3i humidifier. will this humidifier replace the 3i as i can only find the container for the 3i on your website? (Posted: 17th Nov, 2010) A. Yes, the H4i is an improved version of the H3i, with a larger heating plate, and more capacity. Back to Top Submit A New Question Can't Find The Answer You're Looking For? Submit Your Question Below: Related Product:  Resmed H4i Humidifier and TUBE WRAP Your Question:  (Please enter One Question Only! You can ask as many questions as you like, but do not combine them into one post!) Your Reply Email Address:  Security Step:  Enter the text to the Left in the space below: [ CLOSE WINDOW ]