In the northern region because the winter is cold, from the warm interior to the toilet will be relativelycold, so I want to send fresh air to the toilet
Generally has an air inlet and an exhaust pipe into two independent, the wind is fresh air system, it is through the fan to outdoor air concentration brought in (some still with Heat recovery ventilator), fan coil air return again by a fresh air pipeline is sent to every guest room, the mixed air return through the windfan coil out. The fresh air quantity is little, ordinary people can not feel, some in order to saveelectricity, don't even open a fresh air machine, plus extra possible effects of Xinfeng system all, but iscan realize your ideas.