Installation guide: Vyana for retrofits
Retrofitting balanced ventilation is blocked by duct access, not the device. Vyana's through-wall design sidesteps duct runs entirely — m...
Blog
Research, guides, and deep-dives on indoor air quality.
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The science behind aromatherapy diffusion
Aromatherapy's marketing claims outrun its evidence. The research supports modest effects on mood and sleep for some oils (lavender, most...
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Why your bedroom has 2x the CO2 of your living room
Two sleepers in a closed bedroom push CO2 past 2,000 ppm by morning — twice the ASHRAE ceiling. The math behind why bedrooms underperform...
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Air purifier certifications that matter
Five certifications matter; the rest is marketing. CARB is mandatory in CA. AHAM CADR tells actual particle removal rate. True HEPA means...
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Cross-ventilation vs mechanical ventilation
Open windows exchange more air in 5 minutes than an HRV does in 2 hours. But you lose the heat. Passive wins in shoulder season; mechanic...
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VOC sources in typical homes
The top 5 indoor VOCs come from specific sources: formaldehyde, terpenes, BTEX, acetaldehyde, and siloxanes. Most fixes are product swaps...
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How to measure indoor air quality at home
You can't fix what you don't measure. Consumer IAQ monitors have gotten accurate enough since 2020 that $80-200 buys you actionable data ...
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HRV vs ERV vs ventilation fan
Three devices, three jobs. A bathroom fan exhausts stale air. An HRV exhausts stale air and recovers heat. An ERV does both plus moisture...