| 摘要 |
Water heaters comprising: (A) a tank, (B) a layer of insulation, e.g., polyurethane foam, and (C) a polyurethane water heater jacket wrapped about the layer of insulation, exhibit less heat loss per unit length than water heaters alike in all aspects except comprising an ABS water heater jacket. The water heater jacket can be made using RIM technology. |
