4 ms·
It's a nice round number that the manufacturers use a reference point, it's not a hard limit. In 99% of the cases, the out door unit will be connected to a indo
by fastbeef 8y ago
It's a nice round number that the manufacturers use a reference point, it's not a hard limit. In 99% of the cases, the out door unit will be connected to a indoor counterpart that has a 9kW resistance heating element what will aid with heating as the outdoor unit loses efficency with dropping temperature.