FCC-ee is an e+e- circular collider designed to accelerate and collide counter-propagating beams of electrons and positrons. One of the fundamental aspects to be addressed in the design phase is the intensity limitation due to collective effects and the impedance budget. The machine design must be such that the global machine impedance as well as individual equipment do not pose any limits for nominal operation to reach the required machine perfomance.
Although this collider will operate at room temperature, as in the case of other lepton colliders, the heat load in specific machine locations could still represent one of the major issues for the operation with nominal parameters. In particular, we will analyze the electron cloud induced heat load in both the arc components and interaction region magnets.
Besides, preliminary studies on transverse and longitudinal instabilities due to resistive wall and other vacuum chamber components will be also presented, which will help to provide specifications on the coating compatible with the nominal operation and a possible way to reduce the beam coupling impedance.