Can the HOTTAP be used inside? No! The HOTTAP must be used outdoors and in a well ventilated area. Please refer to your User Guide for the appropriate setup. Related articles Can I use the HOTTAP on my River Boat, and can I attach it to my existing plumbing? How many showers can I get with a 9kg gas bottle? HOTTAP User Guide Can I wire the HOTTAP direct to a 12V Supply? Can the HOTTAP be laying flat when in use? Comments 0 comments Please sign in to leave a comment.