@sinz54 @BlakeMMurdoch Better filtration doesn't drastically increase energy costs, and may not at all (higher quality filters can have lower back-reassure even while filtering better, but cost more). Ventilation can use energy recovery, again costs more up front but little energy cost.
@sinz54@BlakeMMurdoch Better filtering不会大幅增加能源成本，而且可能根本不会（即使过滤效果更好，但质量更高的过滤器也会降低背部舒适度，但成本更高）。通风可以利用能量回收，前期成本更高，但能源成本很低。