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1. (WO2017040353) ENVIRONMENTALLY FRIENDLY HEATING VENTILATION AND AIR CONDITIONING SYSTEM

Pub. No.:    WO/2017/040353    International Application No.:    PCT/US2016/049161
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sun Aug 28 01:59:59 CEST 2016
IPC: F25D 16/00
Applicants: ZHANG, Yulong
JIN, Liang
Inventors: ZHANG, Yulong
JIN, Liang
Title: ENVIRONMENTALLY FRIENDLY HEATING VENTILATION AND AIR CONDITIONING SYSTEM
Abstract:
An air circulation system for a building or other enclosed space that includes an heating, venting and air conditioning (HVAC) unit and a first air duct connecting the HVAC unit with the interior of the building. The system also includes a second air duct connecting the exterior of the building with its interior. A fan or secondary unit directs and moves air from outside of the building to inside the building when a controller determines via one or more sensors that an outside condition is preferable to a condition inside the building. The system also may be used in vehicles such as in ground-based vehicles including public transports, and in aircraft.