HouseExhale

Free public tools for adults looking after a home in the United States. Explain bedroom CO₂ readings against HouseExhale’s precautionary 800 ppm average-while-asleep goal; check an exact quoted HRV or ERV against HVI-certified airflow; explore units to ask installers about; and find installer and rebate research. In-chat views show the bedroom scale, unit check and installer list. No account, API key or sign-in is required. This public connection cannot read a journal, contact companies, book work, place orders or take payments. Installer lists carry their ordering rule; unit families carry their technical screening sequence. Installer membership and listing are free. Companies may pay for optional installer tools; payment does not affect inclusion or ordering. This public connector has no sponsored content or paid placements. Installer research currently covers the Colorado Front Range and New England; rebate research covers US states. Eligibility and missing data stay unknown. The 800 ppm goal is not a health limit. Free fixes are tried one at a time, and a door-open night is a one-night diagnostic test, not an ongoing fix.