Is there anything you can buy to reduce indoor CO2 levels without exchanging outdoor air? Is bubbling air through a tank of algae the only solution available to consumers? I'd love some product recommendations from HN, if anyone has one.
1) Get a CO2 monitor and partially open a couple windows whenever the level is above 800 ppm. Cost: $60.
2) Get a good air filter such as an IQAir HealthPro+ and pair it with a ducting adapter such as https://www2.iqair.com/sites/default/files/documents/InFlowW.... This will allow you to constantly exchange your indoor air with filtered fresh air. If you don’t want to install a wall intake for the duct, you can connect it to a window adapter like what is used for portable A/C units. Cost: $1,500.