HVAC MERV ratings: what your furnace filter actually does
MERV 8 catches dust. MERV 13 catches viruses. MERV 16 catches almost everything HEPA does. Most homes ship with MERV 6.
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Set up your sensor, connect your home, and make sense of your air.
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Demand-controlled ventilation
Run the HVAC harder when people are in the room, less when they aren't. CO₂ sensors are how it knows.
Evaporative coolers ("swamp coolers"): cool air, high humidity
Common in the desert Southwest, evaporative coolers add 20-40 grains of moisture to the air for every degree of cooling. Different dynamics than AC, and a different humidity playbook.
