My cylinder is warm on the outside, what can i do to prevent this energy loss? Comments Off on My cylinder is warm on the outside, what can i do to prevent this energy loss? 18 Jan 2016 Vote Up 0 Vote Down Answered Public Public Private Electric Water Cylinders Anonymous asked January 18, 2016 Hi There, My cylinder is warm on the outside, what can i do to prevent this energy loss? 1 answer Vote Up 0 Vote Down Public ⋅ January 19, 2016 Althuogh cylinders are very well insulated there is always room for improvement. We can install a cylinder wrap to hold in even more heat. #1 Please login or Register to Submit Answer