A Rate Ceiling is set within Rezlynx and can only be viewed in Roomlynx and not created or edited. A Rate Ceiling limits the number of reservations made on a certain Rate Plan by day, either at Room Type level or Hotel level.
Rate Ceilings will not affect availability, however once the Ceiling has been reached, a Close will be triggered. If the Ceiling is set at Hotel level, the Close will trigger to all Room Types mapped for that Rate Plan. If the Ceiling is set at Room Type level, only channels with this Room Type mapped will trigger a close.
Once the Ceiling is lifted, so for example a reservation is cancelled that matches the Ceiling, an Open will be triggered to the Channels.
An example of using a Rate Ceiling would be to limit the number of reservations made on a particular Rate Plan, possibly for a promotional Rate Plan.
Adding a ceiling will NOT restrict how many rooms will show available on online channels (i.e. OTAs & your own website), it will simply restrict the number of individual reservations that can be booked if a ceiling is set.