1/3 DIY window air exchanger with HEPA â built while house-sitting for my partner during her trip down south.
Not an HRV, just a simple air exchanger â quiet, effective fix (~35âŻdB) for high COâ in a tiny bedroom, for under $100. 3â4h build & install 3-night COâ test 1h airflow + sound testing
9 months ago