46|PROTAGONISTA opinion, the real problem is the interface used by these systems. Teaching the hotel personnel how to use a new system is difficult but feasible and it is actually done when a new system is installed in the Conference Room, Reception or in the Restaurant but expecting every guest that takes a room to “guess” how the system operates and the possibilities of a “multitouch” key is a little more complicated. Normally, the number of nights a guest spends in a hotel (depending on the use: for vacation or for business) is from one to four, so in the best-case scenario the guest learns how to operate the system on the day he checks out. This results in countless phone calls to the Reception inquiring about the operation of the system or complaining about a malfunction. How has energy efficiency changed your approach to work in a hotel? Requirements to be up to code are increasing each time. To be sure, a