Ventilation is important since the dome covers are impermeable to air and water. We design our glamping package with plenty of ventilation in mind. 3 opening triangle windows with removable screens provide lots of natural airflow. You can add a solar fan, or an electric fan. In the summer, if the sun shines directly into the panorama window it can get quite hot. Rigging up some shade sails outside, closing the curtains, and opening all the windows will help.
In the winter, a dehumidifier can be very helpful for removing moisture from the air and preventing condensation issues that result from the temperature difference between inside and outside the dome.