Hampton by Hilton Calisia One in Kalisz is a building with an exceptional history. This is where the Calisia piano and grand piano factory was located. The factory enjoyed more 130 prosperous years in the city of Kalisz. Then, the building with very interesting architecture, built in 1878, was converted into an office, hotel and culture complex. Today, it is protected by SMAY ventilation devices and systems.

A differential pressure system that prevents smoke accumulation in vertical evacuation routes was designed specifically for the building. Solutions from Smay Sp. z o.o. are designed for gaining overpressure in the passenger elevator shafts. The system is a modular solution that uses complete differential pressure sets called iSWAY. The concept was developed with the iSWAY-FC certified differential pressure sets in mind.