It can be operated completely independently of different heat sources, such as outdoor ambient air, the energy potential of unheated rooms and air discharged with humidity from bathrooms, toilets, and laundry rooms.
Maaari itong pinapatakbo ganap na nakapag-iisa ng mga iba't ibang mga pinagmumulan ng init, tulad ng panlabas na ambient air, ang enerhiya potensyal ng unheated kuwarto at air discharged na may kahalumigmigan mula sa banyo, toilet, at laundry room.