Dec 31
Jessica asked:
In winter time, we always close all of the doors and turn on the heater. Does the heater system provide new oxygen for us to breath or we just get oxygen from the chinks in the doors?
Thanks.
In winter time, we always close all of the doors and turn on the heater. Does the heater system provide new oxygen for us to breath or we just get oxygen from the chinks in the doors?
Thanks.










