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Mini split

A mini-split is a single-zone ductless heat pump system that consists of 1 indoor unit and 1 outdoor unit.
Either unit can act as a condenser or evaporator to draw heat energy from ambient air.

  • decentralized air conditioner, sometimes can also heat.
  • decentralized heat pump. can control each room (zone control)

Economic to handle 1 room, if 2 rooms need HVAC a multi split is better.

this article talks about using minisplits in a passive house for heating.

how it works

It works by moving heat from one place to another. By transporting only that thermal energy, and not air, it provides heating and cooling throughout the house without ductwork. The refrigerant travels through the system via narrow piping to transport the heat.