The tank shall be totally encased in a metal jacket and insulated with a non-CFC foam to reduce stand-by heat loss.
The tank shall be totally encased in a metal jacket and insulated with a non-CFC foam to reduce stand-by heat loss.
应该采用金属外壳将热水器内胆完全包裹起来，并配置非氯氟烃泡沫加以绝缘隔热，以减少热量损失。