About: http://webisa.webdatacommons.org/143076470

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	One possible DIY system you might look up and play with is an air to air heat exchanger, which would allow you to bring in fresh air from the outside and expel the CO2 and other products to the outside.
http://www.w3.org/ns/prov#wasQuotedFrom	thesurvivalistblog.net