A method for efficiently producing high purity vinyl ether represented by the following formula from tertiary alcohol having a low reactivity comprising by reacting acetylene and a tertiary alcohol in the presence of a base using, as a solvent, a cyclic urea compound or glyme compound or mixture thereof:is provided. The wands are attachable to the vehicle’s side prior to parking it to provide the extension length without risk of damage to the slideout. A portable information device access point is provided for helping the portable information device reciprocally communicate with the home appliances connected to the high-speed and low-speed networks. In cases where the insulation systems are subject to extreme temperature fluctuations, components of the insulation may thermally expand andor contract, and may form gaps between the components. Over repeated generations, the solutions in the population improve.