暖機運転は不要!? https://bure55.kms-55.com/2007/01/19/%e6%9a%96%e6%a9%9f%e9%81%8b%e8%bb%a2%e3%81%af%e4%b8%8d%e8%a6%81%ef%bc%81%ef%bc%9f/