3 ms·

> five air changes per hour This appears in direct opposition to newer building codes to reduce energy usage.

• jefftk 3y ago
  They include filtration or germicidal UV: https://www.cdc.gov/coronavirus/2019-ncov/community/ventilation.html https://www.cdc.gov/coronavirus/2019-ncov/community/ventilat... If you do want to bring in outside air, you can use a heat exchange system to minimize the energy impact.
• jeffbee 3y ago
  Energy usage standards will soon be considered obsolete and counterproductive. They made sense before but as zero-carbon energy policies come into force, energy efficiency becomes less important. After you decouple the carbon from the energy, policies will change.
• Aspos 3y ago
  Energy recovery ventilators are great. Some of these systems have been known to have heat exchange efficiencies as high as 70-80% while others have as low as 50% It is subjective and anecdotal, but I am now more productive and I sleep better with a bunch of ERVs installed in my house. https://en.wikipedia.org/wiki/Energy_recovery_ventilation https://en.wikipedia.org/wiki/Energy_recovery_ventilation