不同的merv评级是什么意思？
merv or minimum efficiency reporting value rating is essential for understanding whether to purchase a merv 16 air filter or a merv 8 air filter for the home. the difference in air filters determines what types of particles are caught and removed by the air filter.
古德曼热泵的价格从1,800美元到6,000美元以上不等，具体取决于型号。