@property<EOL><INDENT>def annual_heating_design_day_990(self):<DEDENT>
if bool(self._winter_des_day_dict) is True:<EOL><INDENT>return DesignDay.from_ashrae_dict_heating(<EOL>self._winter_des_day_dict, self.location, True,<EOL>self._stand_press_at_elev)<EOL><DEDENT>else:<EOL><INDENT>return None<EOL><DEDENT>
A design day object representing the annual 99.0% heating design day.