Czech residents urged to improve night ventilation and consider silent mobile AC units

Effective night ventilation of a house requires the outdoor temperature to be lower than the indoor temperature and a continuous airflow path across rooms. Opening windows on opposite sides, using interior doors, and adding a fan can replace warm indoor air with cooler exterior air. Cooling also needs to affect walls, ceilings and furniture, and windows should be closed and shaded in the morning as soon as temperatures rise.

For households unable to install permanent split‑system air conditioners, a portable unit offers a quick solution. The Sencor SAC MT1270C ExtraSilent provides 12 000 BTU/h cooling power while operating below 45 dB(A), includes an app‑controlled interface, and is classified in energy class A. It is marketed for renters, bedrooms and spaces where low noise is essential, but it requires floor space and an exhaust hose that must be vented through a partially opened window.