First of all, ultra-low temperature air source heat pump is also a type of central air conditioner
Secondly, the compressor of ordinary air conditioners cannot start at -15 degrees, so an ultra-low temperature heat pump is required
Again, if the floor heating is used indoors, the effect will be better if the floor heating is designed better
Finally, if the capillary floor heating is used indoors, the effect will be even more extraordinary, let alone 26 degrees, 29 degrees None of it is a problem.