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. 2016 Mar 30;7:270. doi: 10.3389/fpls.2016.00270

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Copyright © 2016 Wang, Tong, Yang and Xin.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Sensible heat factor (SHF) of the air exchanger and heat pumps as affected by the air temperature difference between indoor and outdoor. SHF_ae, sensible heat factor of the air exchanger; SHF_e, sensible heat factor of the heat pump in the PPAL_e; SHF_c, sensible heat factor of the heat pump in the PPAL_c.