Lowering the Strength of a Fan, Dimming the Lights, Lowering the Settings on a Heater or Refrigerator;
floor Drain with Hinges or Handle, Shelf in a Bookcase with Hinges, and the Use of a High Riser or Sofa Bed on Shabbos;
ודבר דבר (Dabair Davar): Introduction to What One Could Talk About on Shabbos and What One Can't;